X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=autorandr.py;h=fe1906d16e83b2fed2f71ddbee8592eee1ce6ff9;hb=ffd20489a2beacecf295f138dcfb9f6106d6a606;hp=d36b568485aca6e87a3b61e83ada3be63fe866b6;hpb=4dbe0d4ed2df628e946e81d7572f800896bc80c5;p=deb_pkgs%2Fautorandr.git

diff --git a/autorandr.py b/autorandr.py
index d36b568..fe1906d 100755
--- a/autorandr.py
+++ b/autorandr.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # encoding: utf-8
 #
 # autorandr.py
@@ -26,29 +26,35 @@ from __future__ import print_function
 
 import binascii
 import copy
-import fnmatch
 import getopt
 import hashlib
+import math
 import os
 import posix
 import pwd
 import re
+import shlex
 import subprocess
 import sys
 import shutil
 import time
+import glob
 
 from collections import OrderedDict
-from distutils.version import LooseVersion as Version
 from functools import reduce
 from itertools import chain
 
+try:
+    from packaging.version import Version
+except ModuleNotFoundError:
+    from distutils.version import LooseVersion as Version
+
 if sys.version_info.major == 2:
     import ConfigParser as configparser
 else:
     import configparser
 
-__version__ = "1.7"
+__version__ = "1.12.1"
 
 try:
     input = raw_input
@@ -64,6 +70,20 @@ virtual_profiles = [
     ("vertical", "Stack all connected outputs vertically at their largest resolution", None),
 ]
 
+properties = [
+    "Colorspace",
+    "max bpc",
+    "aspect ratio",
+    "Broadcast RGB",
+    "audio",
+    "non-desktop",
+    "TearFree",
+    "underscan vborder",
+    "underscan hborder",
+    "underscan",
+    "scaling mode",
+]
+
 help_text = """
 Usage: autorandr [options]
 
@@ -76,11 +96,15 @@ Usage: autorandr [options]
 --batch                 run autorandr for all users with active X11 sessions
 --current               only list current (active) configuration(s)
 --config                dump your current xrandr setup
+--cycle                 automatically load the next detected profile
 --debug                 enable verbose output
 --detected              only list detected (available) configuration(s)
 --dry-run               don't change anything, only print the xrandr commands
 --fingerprint           fingerprint your current hardware setup
---force                 force (re)loading of a profile
+--ignore-lid            treat outputs as connected even if their lids are closed
+--match-edid            match diplays based on edid instead of name
+--force                 force (re)loading of a profile / overwrite exiting files
+--list                  list configurations
 --skip-options <option> comma separated list of xrandr arguments (e.g. "gamma")
                         to skip both in detecting changes and applying a profile
 --version               show version information and exit
@@ -96,6 +120,18 @@ Usage: autorandr [options]
 """.strip()
 
 
+def is_closed_lid(output):
+    if not re.match(r'(eDP(-?[0-9]\+)*|LVDS(-?[0-9]\+)*)', output):
+        return False
+    lids = glob.glob("/proc/acpi/button/lid/*/state")
+    if len(lids) == 1:
+        state_file = lids[0]
+        with open(state_file) as f:
+            content = f.read()
+            return "close" in content
+    return False
+
+
 class AutorandrException(Exception):
     def __init__(self, message, original_exception=None, report_bug=False):
         self.message = message
@@ -138,9 +174,14 @@ class AutorandrException(Exception):
 class XrandrOutput(object):
     "Represents an XRandR output"
 
+    XRANDR_PROPERTIES_REGEXP = "|".join(
+        [r"{}:\s*(?P<{}>[\S ]*\S+)"
+         .format(re.sub(r"\s", r"\\\g<0>", p), re.sub(r"\W+", "_", p.lower()))
+            for p in properties])
+
     # This regular expression is used to parse an output in `xrandr --verbose'
     XRANDR_OUTPUT_REGEXP = """(?x)
-        ^(?P<output>[^ ]+)\s+                                                           # Line starts with output name
+        ^\s*(?P<output>\S[^ ]*)\s+                                                      # Line starts with output name
         (?:                                                                             # Differentiate disconnected and connected
             disconnected |                                                              # in first line
             unknown\ connection |
@@ -160,9 +201,12 @@ class XrandrOutput(object):
         (?:[\ \t]*tracking\ (?P<tracking>[0-9]+x[0-9]+\+[0-9]+\+[0-9]+))?               # Tracking information
         (?:[\ \t]*border\ (?P<border>(?:[0-9]+/){3}[0-9]+))?                            # Border information
         (?:\s*(?:                                                                       # Properties of the output
-            Gamma: (?P<gamma>(?:inf|[0-9\.: e])+) |                                     # Gamma value
+            Gamma: (?P<gamma>(?:inf|-?[0-9\.\-: e])+) |                                 # Gamma value
+            CRTC:\s*(?P<crtc>[0-9]) |                                                   # CRTC value
             Transform: (?P<transform>(?:[\-0-9\. ]+\s+){3}) |                           # Transformation matrix
+                      filter:\s+(?P<filter>bilinear|nearest) |                          # Transformation filter
             EDID: (?P<edid>\s*?(?:\\n\\t\\t[0-9a-f]+)+) |                               # EDID of the output
+            """ + XRANDR_PROPERTIES_REGEXP + """ |                                      # Properties to include in the profile
             (?![0-9])[^:\s][^:\n]+:.*(?:\s\\t[\\t ].+)*                                 # Other properties
         ))+
         \s*
@@ -196,7 +240,7 @@ class XrandrOutput(object):
     EDID_UNAVAILABLE = "--CONNECTED-BUT-EDID-UNAVAILABLE-"
 
     def __repr__(self):
-        return "<%s%s %s>" % (self.output, self.short_edid, " ".join(self.option_vector))
+        return "<%s%s %s>" % (self.output, self.fingerprint, " ".join(self.option_vector))
 
     @property
     def short_edid(self):
@@ -225,7 +269,22 @@ class XrandrOutput(object):
         "Return the command line parameters for XRandR for this instance"
         args = ["--output", self.output]
         for option, arg in sorted(self.options_with_defaults.items()):
-            args.append("--%s" % option)
+            if option.startswith("x-prop-"):
+                prop_found = False
+                for prop, xrandr_prop in [(re.sub(r"\W+", "_", p.lower()), p) for p in properties]:
+                    if prop == option[7:]:
+                        args.append("--set")
+                        args.append(xrandr_prop)
+                        prop_found = True
+                        break
+                if not prop_found:
+                    print("Warning: Unknown property `%s' in config file. Skipping." % option[7:], file=sys.stderr)
+                    continue
+            elif option.startswith("x-"):
+                print("Warning: Unknown option `%s' in config file. Skipping." % option, file=sys.stderr)
+                continue
+            else:
+                args.append("--%s" % option)
             if arg:
                 args.append(arg)
         return args
@@ -260,8 +319,32 @@ class XrandrOutput(object):
         self.edid = edid
         self.options = options
         self.ignored_options = []
+        self.parse_serial_from_edid()
         self.remove_default_option_values()
 
+    def parse_serial_from_edid(self):
+        self.serial = None
+        if self.edid:
+            # Thx to pyedid project, the following code was
+            # copied (and modified) from pyedid/__init__py:21 [parse_edid()]
+            raw = bytes.fromhex(self.edid)
+            # Check EDID header, and checksum
+            if raw[:8] != b'\x00\xff\xff\xff\xff\xff\xff\x00' or sum(raw) % 256 != 0:
+                return
+            serial_no = int.from_bytes(raw[15:11:-1], byteorder='little')
+
+            serial_text = None
+            # Offsets of standard timing information descriptors 1-4
+            # (see https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#EDID_1.4_data_format)
+            for timing_bytes in (raw[54:72], raw[72:90], raw[90:108], raw[108:126]):
+                if timing_bytes[0:2] == b'\x00\x00':
+                    timing_type = timing_bytes[3]
+                    if timing_type == 0xFF:
+                        buffer = timing_bytes[5:]
+                        buffer = buffer.partition(b'\x0a')[0]
+                        serial_text = buffer.decode('cp437')
+            self.serial = serial_text if serial_text else "0x{:x}".format(serial_no) if serial_no != 0 else None
+
     def set_ignored_options(self, options):
         "Set a list of xrandr options that are never used (neither when comparing configurations nor when applying them)"
         self.ignored_options = list(options)
@@ -317,6 +400,12 @@ class XrandrOutput(object):
         else:
             edid = "%s-%s" % (XrandrOutput.EDID_UNAVAILABLE, match["output"])
 
+        # An output can be disconnected but still have a mode configured. This can only happen
+        # as a residual situation after a disconnect, you cannot associate a mode with an disconnected
+        # output.
+        #
+        # This code needs to be careful not to mix the two. An output should only be configured to
+        # "off" if it doesn't have a mode associated with it, which is modelled as "not a width" here.
         if not match["width"]:
             options["off"] = None
         else:
@@ -326,10 +415,11 @@ class XrandrOutput(object):
                 options["mode"] = "%sx%s" % (match["mode_width"], match["mode_height"])
             else:
                 if match["rotate"] not in ("left", "right"):
-                    options["mode"] = "%sx%s" % (match["width"], match["height"])
+                    options["mode"] = "%sx%s" % (match["width"] or 0, match["height"] or 0)
                 else:
-                    options["mode"] = "%sx%s" % (match["height"], match["width"])
-            options["rotate"] = match["rotate"]
+                    options["mode"] = "%sx%s" % (match["height"] or 0, match["width"] or 0)
+            if match["rotate"]:
+                options["rotate"] = match["rotate"]
             if match["primary"]:
                 options["primary"] = None
             if match["reflect"] == "X":
@@ -338,7 +428,8 @@ class XrandrOutput(object):
                 options["reflect"] = "y"
             elif match["reflect"] == "X and Y":
                 options["reflect"] = "xy"
-            options["pos"] = "%sx%s" % (match["x"], match["y"])
+            if match["x"] or match["y"]:
+                options["pos"] = "%sx%s" % (match["x"] or "0", match["y"] or "0")
             if match["panning"]:
                 panning = [match["panning"]]
                 if match["tracking"]:
@@ -355,6 +446,8 @@ class XrandrOutput(object):
                         # I doubt that this special case is actually required.
                         print("Warning: Output %s has a transformation applied. Could not determine correct mode! "
                               "Using `%s'." % (match["output"], options["mode"]), file=sys.stderr)
+            if match["filter"]:
+                options["filter"] = match["filter"]
             if match["gamma"]:
                 gamma = match["gamma"].strip()
                 # xrandr prints different values in --verbose than it accepts as a parameter value for --gamma
@@ -362,8 +455,13 @@ class XrandrOutput(object):
                 # so we approximate by 1e-10.
                 gamma = ":".join([str(max(1e-10, round(1. / float(x), 3))) for x in gamma.split(":")])
                 options["gamma"] = gamma
+            if match["crtc"]:
+                options["crtc"] = match["crtc"]
             if match["rate"]:
                 options["rate"] = match["rate"]
+            for prop in [re.sub(r"\W+", "_", p.lower()) for p in properties]:
+                if match[prop]:
+                    options["x-prop-" + prop] = match[prop]
 
         return XrandrOutput(match["output"], edid, options), modes
 
@@ -396,6 +494,16 @@ class XrandrOutput(object):
 
         return XrandrOutput(output, edid, options)
 
+    @property
+    def fingerprint(self):
+        return str(self.serial) if self.serial else self.short_edid
+
+    def fingerprint_equals(self, other):
+        if self.serial and other.serial:
+           return self.serial == other.serial
+        else:
+           return self.edid_equals(other)
+
     def edid_equals(self, other):
         "Compare to another XrandrOutput's edid and on/off-state, taking legacy autorandr behaviour (md5sum'ing) into account"
         if self.edid and other.edid:
@@ -404,22 +512,22 @@ class XrandrOutput(object):
             if len(self.edid) != 32 and len(other.edid) == 32 and not self.edid.startswith(XrandrOutput.EDID_UNAVAILABLE):
                 return hashlib.md5(binascii.unhexlify(self.edid)).hexdigest() == other.edid
             if "*" in self.edid:
-                return fnmatch.fnmatch(other.edid, self.edid)
+                return match_asterisk(self.edid, other.edid) > 0
             elif "*" in other.edid:
-                return fnmatch.fnmatch(self.edid, other.edid)
+                return match_asterisk(other.edid, self.edid) > 0
         return self.edid == other.edid
 
     def __ne__(self, other):
         return not (self == other)
 
     def __eq__(self, other):
-        return self.edid_equals(other) and self.output == other.output and self.filtered_options == other.filtered_options
+        return self.fingerprint_equals(other) and self.output == other.output and self.filtered_options == other.filtered_options
 
     def verbose_diff(self, other):
         "Compare to another XrandrOutput and return a list of human readable differences"
         diffs = []
-        if not self.edid_equals(other):
-            diffs.append("EDID `%s' differs from `%s'" % (self.short_edid, other.short_edid))
+        if not self.fingerprint_equals(other):
+            diffs.append("EDID `%s' differs from `%s'" % (self.fingerprint, other.fingerprint))
         if self.output != other.output:
             diffs.append("Output name `%s' differs from `%s'" % (self.output, other.output))
         if "off" in self.options and "off" not in other.options:
@@ -472,7 +580,10 @@ def debug_regexp(pattern, string):
     return "Debug information would be available if the `regex' module was installed."
 
 
-def parse_xrandr_output():
+def parse_xrandr_output(
+    *,
+    ignore_lid,
+):
     "Parse the output of `xrandr --verbose' into a list of outputs"
     xrandr_output = os.popen("xrandr -q --verbose").read()
     if not xrandr_output:
@@ -494,6 +605,16 @@ def parse_xrandr_output():
         if output_modes:
             modes[output_name] = output_modes
 
+    # consider a closed lid as disconnected if other outputs are connected
+    if not ignore_lid and sum(
+        o.edid != None
+        for o
+        in outputs.values()
+    ) > 1:
+        for output_name in outputs.keys():
+            if is_closed_lid(output_name):
+                outputs[output_name].edid = None
+
     return outputs, modes
 
 
@@ -543,22 +664,76 @@ def get_symlinks(profile_path):
     return symlinks
 
 
+def match_asterisk(pattern, data):
+    """Match data against a pattern
+
+    The difference to fnmatch is that this function only accepts patterns with a single
+    asterisk and that it returns a "closeness" number, which is larger the better the match.
+    Zero indicates no match at all.
+    """
+    if "*" not in pattern:
+        return 1 if pattern == data else 0
+    parts = pattern.split("*")
+    if len(parts) > 2:
+        raise ValueError("Only patterns with a single asterisk are supported, %s is invalid" % pattern)
+    if not data.startswith(parts[0]):
+        return 0
+    if not data.endswith(parts[1]):
+        return 0
+    matched = len(pattern)
+    total = len(data) + 1
+    return matched * 1. / total
+
+
+def update_profiles_edid(profiles, config):
+    fp_map = {}
+    for c in config:
+        if config[c].fingerprint is not None:
+            fp_map[config[c].fingerprint] = c
+
+    for p in profiles:
+        profile_config = profiles[p]["config"]
+
+        for fingerprint in fp_map:
+            for c in list(profile_config.keys()):
+                if profile_config[c].fingerprint != fingerprint or c == fp_map[fingerprint]:
+                    continue
+
+                print("%s: renaming display %s to %s" % (p, c, fp_map[fingerprint]))
+
+                tmp_disp = profile_config[c]
+
+                if fp_map[fingerprint] in profile_config:
+                    # Swap the two entries
+                    profile_config[c] = profile_config[fp_map[fingerprint]]
+                    profile_config[c].output = c
+                else:
+                    # Object is reassigned to another key, drop this one
+                    del profile_config[c]
+
+                profile_config[fp_map[fingerprint]] = tmp_disp
+                profile_config[fp_map[fingerprint]].output = fp_map[fingerprint]
+
+
 def find_profiles(current_config, profiles):
-    "Find profiles matching the currently connected outputs"
+    "Find profiles matching the currently connected outputs, sorting asterisk matches to the back"
     detected_profiles = []
     for profile_name, profile in profiles.items():
         config = profile["config"]
         matches = True
         for name, output in config.items():
-            if not output.edid:
+            if not output.fingerprint:
                 continue
-            if name not in current_config or not output.edid_equals(current_config[name]):
+            if name not in current_config or not output.fingerprint_equals(current_config[name]):
                 matches = False
                 break
-        if not matches or any((name not in config.keys() for name in current_config.keys() if current_config[name].edid)):
+        if not matches or any((name not in config.keys() for name in current_config.keys() if current_config[name].fingerprint)):
             continue
         if matches:
-            detected_profiles.append(profile_name)
+            closeness = max(match_asterisk(output.edid, current_config[name].edid), match_asterisk(
+                current_config[name].edid, output.edid))
+            detected_profiles.append((closeness, profile_name))
+    detected_profiles = [o[1] for o in sorted(detected_profiles, key=lambda x: -x[0])]
     return detected_profiles
 
 
@@ -571,6 +746,17 @@ def profile_blocked(profile_path, meta_information=None):
     return not exec_scripts(profile_path, "block", meta_information)
 
 
+def check_configuration_pre_save(configuration):
+    "Check that a configuration is safe for saving."
+    outputs = sorted(configuration.keys(), key=lambda x: configuration[x].sort_key)
+    for output in outputs:
+        if "off" not in configuration[output].options and not configuration[output].edid:
+            return ("`%(o)s' is not off (has a mode configured) but is disconnected (does not have an EDID).\n"
+                    "This typically means that it has been recently unplugged and then not properly disabled\n"
+                    "by the user. Please disable it (e.g. using `xrandr --output %(o)s --off`) and then rerun\n"
+                    "this command.") % {"o": output}
+
+
 def output_configuration(configuration, config):
     "Write a configuration file"
     outputs = sorted(configuration.keys(), key=lambda x: configuration[x].sort_key)
@@ -586,13 +772,20 @@ def output_setup(configuration, setup):
             print(output, configuration[output].edid, file=setup)
 
 
-def save_configuration(profile_path, configuration):
+def save_configuration(profile_path, profile_name, configuration, forced=False):
     "Save a configuration into a profile"
     if not os.path.isdir(profile_path):
         os.makedirs(profile_path)
-    with open(os.path.join(profile_path, "config"), "w") as config:
+    config_path = os.path.join(profile_path, "config")
+    setup_path = os.path.join(profile_path, "setup")
+    if os.path.isfile(config_path) and not forced:
+        raise AutorandrException('Refusing to overwrite config "{}" without passing "--force"!'.format(profile_name))
+    if os.path.isfile(setup_path) and not forced:
+        raise AutorandrException('Refusing to overwrite config "{}" without passing "--force"!'.format(profile_name))
+
+    with open(config_path, "w") as config:
         output_configuration(configuration, config)
-    with open(os.path.join(profile_path, "setup"), "w") as setup:
+    with open(setup_path, "w") as setup:
         output_setup(configuration, setup)
 
 
@@ -612,23 +805,22 @@ def call_and_retry(*args, **kwargs):
     waits a second and then retries once. This mitigates #47,
     a timing issue with some drivers.
     """
-    if "dry_run" in kwargs:
-        dry_run = kwargs["dry_run"]
-        del kwargs["dry_run"]
+    if kwargs.pop("dry_run", False):
+        for arg in args[0]:
+            print(shlex.quote(arg), end=" ")
+        print()
+        return 0
     else:
-        dry_run = False
-    kwargs_redirected = dict(kwargs)
-    if not dry_run:
         if hasattr(subprocess, "DEVNULL"):
-            kwargs_redirected["stdout"] = getattr(subprocess, "DEVNULL")
+            kwargs["stdout"] = getattr(subprocess, "DEVNULL")
         else:
-            kwargs_redirected["stdout"] = open(os.devnull, "w")
-        kwargs_redirected["stderr"] = kwargs_redirected["stdout"]
-    retval = subprocess.call(*args, **kwargs_redirected)
-    if retval != 0:
-        time.sleep(1)
+            kwargs["stdout"] = open(os.devnull, "w")
+        kwargs["stderr"] = kwargs["stdout"]
         retval = subprocess.call(*args, **kwargs)
-    return retval
+        if retval != 0:
+            time.sleep(1)
+            retval = subprocess.call(*args, **kwargs)
+        return retval
 
 
 def get_fb_dimensions(configuration):
@@ -638,7 +830,11 @@ def get_fb_dimensions(configuration):
         if "off" in output.options or not output.edid:
             continue
         # This won't work with all modes -- but it's a best effort.
-        o_width, o_height = map(int, output.options["mode"].split("x"))
+        match = re.search("[0-9]{3,}x[0-9]{3,}", output.options["mode"])
+        if not match:
+            return None
+        o_mode = match.group(0)
+        o_width, o_height = map(int, o_mode.split("x"))
         if "transform" in output.options:
             a, b, c, d, e, f, g, h, i = map(float, output.options["transform"].split(","))
             w = (g * o_width + h * o_height + i)
@@ -655,21 +851,21 @@ def get_fb_dimensions(configuration):
         if "panning" in output.options:
             match = re.match("(?P<w>[0-9]+)x(?P<h>[0-9]+)(?:\+(?P<x>[0-9]+))?(?:\+(?P<y>[0-9]+))?.*", output.options["panning"])
             if match:
-                detail = match.groupdict()
-                o_width = int(detail.get("w")) + int(detail.get("x", "0"))
-                o_height = int(detail.get("h")) + int(detail.get("y", "0"))
+                detail = match.groupdict(default="0")
+                o_width = int(detail.get("w")) + int(detail.get("x"))
+                o_height = int(detail.get("h")) + int(detail.get("y"))
         width = max(width, o_width)
         height = max(height, o_height)
-    return int(width), int(height)
+    return math.ceil(width), math.ceil(height)
 
 
 def apply_configuration(new_configuration, current_configuration, dry_run=False):
     "Apply a configuration"
+    found_top_left_monitor = False
+    found_left_monitor = False
+    found_top_monitor = False
     outputs = sorted(new_configuration.keys(), key=lambda x: new_configuration[x].sort_key)
-    if dry_run:
-        base_argv = ["echo", "xrandr"]
-    else:
-        base_argv = ["xrandr"]
+    base_argv = ["xrandr"]
 
     # There are several xrandr / driver bugs we need to take care of here:
     # - We cannot enable more than two screens at the same time
@@ -706,6 +902,9 @@ def apply_configuration(new_configuration, current_configuration, dry_run=False)
         if not new_configuration[output].edid or "off" in new_configuration[output].options:
             disable_outputs.append(new_configuration[output].option_vector)
         else:
+            if output not in current_configuration:
+                raise AutorandrException("New profile configures output %s which does not exist in current xrandr --verbose output. "
+                                         "Don't know how to proceed." % output)
             if "off" not in current_configuration[output].options:
                 remain_active_count += 1
 
@@ -721,8 +920,21 @@ def apply_configuration(new_configuration, current_configuration, dry_run=False)
                                 option_vector = option_vector[:option_index] + option_vector[option_index + 2:]
                         except ValueError:
                             pass
-
-            enable_outputs.append(option_vector)
+            if not found_top_left_monitor:
+                position = new_configuration[output].options.get("pos", "0x0")
+                if position == "0x0":
+                    found_top_left_monitor = True
+                    enable_outputs.insert(0, option_vector)
+                elif not found_left_monitor and position.startswith("0x"):
+                    found_left_monitor = True
+                    enable_outputs.insert(0, option_vector)
+                elif not found_top_monitor and position.endswith("x0"):
+                    found_top_monitor = True
+                    enable_outputs.insert(0, option_vector)
+                else:
+                    enable_outputs.append(option_vector)
+            else:
+                enable_outputs.append(option_vector)
 
     # Perform pe-change auxiliary changes
     if auxiliary_changes_pre:
@@ -749,6 +961,13 @@ def apply_configuration(new_configuration, current_configuration, dry_run=False)
         # In the context of a xrandr call that changes the display state, `--query' should do nothing
         disable_outputs.insert(0, ['--query'])
 
+    # If we did not find a candidate, we might need to inject a call
+    # If there is no output to disable, we will enable 0x and x0 at the same time
+    if not found_top_left_monitor and len(disable_outputs) > 0:
+        # If the call to 0x and x0 is splitted, inject one of them
+        if found_top_monitor and found_left_monitor:
+            enable_outputs.insert(0, enable_outputs[0])
+
     # Enable the remaining outputs in pairs of two operations
     operations = disable_outputs + enable_outputs
     for index in range(0, len(operations), 2):
@@ -937,11 +1156,12 @@ def exec_scripts(profile_path, script_name, meta_information=None):
     if not os.path.isdir(user_profile_path):
         user_profile_path = os.path.join(os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")), "autorandr")
 
-    candidate_directories = [user_profile_path]
-    for config_dir in os.environ.get("XDG_CONFIG_DIRS", "/etc/xdg").split(":"):
-        candidate_directories.append(os.path.join(config_dir, "autorandr"))
+    candidate_directories = []
     if profile_path:
         candidate_directories.append(profile_path)
+    candidate_directories.append(user_profile_path)
+    for config_dir in os.environ.get("XDG_CONFIG_DIRS", "/etc/xdg").split(":"):
+        candidate_directories.append(os.path.join(config_dir, "autorandr"))
 
     for folder in candidate_directories:
         if script_name not in ran_scripts:
@@ -1000,16 +1220,33 @@ def dispatch_call_to_sessions(argv):
             # so it should be safe. Also, note that since the environment
             # is taken from a process owned by the user, reusing it should
             # not leak any information.
-            os.setgroups([])
+            try:
+                os.setgroups(os.getgrouplist(pwent.pw_name, pwent.pw_gid))
+            except AttributeError:
+                # Python 2 doesn't have getgrouplist
+                os.setgroups([])
             os.setresgid(pwent.pw_gid, pwent.pw_gid, pwent.pw_gid)
             os.setresuid(pwent.pw_uid, pwent.pw_uid, pwent.pw_uid)
             os.chdir(pwent.pw_dir)
             os.environ.clear()
             os.environ.update(process_environ)
-            os.execl(autorandr_binary, autorandr_binary, *argv[1:])
-            os.exit(1)
+            if sys.executable != "" and sys.executable != None:
+                os.execl(sys.executable, sys.executable, autorandr_binary, *argv[1:])
+            else:
+                os.execl(autorandr_binary, autorandr_binary, *argv[1:])
+            sys.exit(1)
         os.waitpid(child_pid, 0)
 
+    # The following line assumes that user accounts start at 1000 and that no
+    # one works using the root or another system account. This is rather
+    # restrictive, but de facto default. If this breaks your use case, set the
+    # env var AUTORANDR_UID_MIN as appropriate. (Alternatives would be to use
+    # the UID_MIN from /etc/login.defs or FIRST_UID from /etc/adduser.conf; but
+    # effectively, both values aren't binding in any way.)
+    uid_min = 1000
+    if 'AUTORANDR_UID_MIN' in os.environ:
+      uid_min = int(os.environ['AUTORANDR_UID_MIN'])
+
     for directory in os.listdir("/proc"):
         directory = os.path.join("/proc/", directory)
         if not os.path.isdir(directory):
@@ -1019,17 +1256,15 @@ def dispatch_call_to_sessions(argv):
             continue
         uid = os.stat(environ_file).st_uid
 
-        # The following line assumes that user accounts start at 1000 and that
-        # no one works using the root or another system account. This is rather
-        # restrictive, but de facto default. Alternatives would be to use the
-        # UID_MIN from /etc/login.defs or FIRST_UID from /etc/adduser.conf;
-        # but effectively, both values aren't binding in any way.
-        # If this breaks your use case, please file a bug on Github.
-        if uid < 1000:
+        if uid < uid_min:
             continue
 
         process_environ = {}
-        for environ_entry in open(environ_file).read().split("\0"):
+        for environ_entry in open(environ_file, 'rb').read().split(b"\0"):
+            try:
+                environ_entry = environ_entry.decode("ascii")
+            except UnicodeDecodeError:
+                continue
             name, sep, value = environ_entry.partition("=")
             if name and sep:
                 if name == "DISPLAY" and "." in value:
@@ -1096,10 +1331,32 @@ def read_config(options, directory):
 
 def main(argv):
     try:
-        opts, args = getopt.getopt(argv[1:], "s:r:l:d:cfh",
-                                   ["batch", "dry-run", "change", "default=", "save=", "remove=", "load=",
-                                    "force", "fingerprint", "config", "debug", "skip-options=", "help",
-                                    "current", "detected", "version"])
+        opts, args = getopt.getopt(
+            argv[1:],
+            "s:r:l:d:cfh",
+            [
+                "batch",
+                "dry-run",
+                "change",
+                "cycle",
+                "default=",
+                "save=",
+                "remove=",
+                "load=",
+                "force",
+                "fingerprint",
+                "config",
+                "debug",
+                "skip-options=",
+                "help",
+                "list",
+                "current",
+                "detected",
+                "version",
+                "match-edid",
+                "ignore-lid"
+            ]
+        )
     except getopt.GetoptError as e:
         print("Failed to parse options: {0}.\n"
               "Use --help to get usage information.".format(str(e)),
@@ -1152,15 +1409,27 @@ def main(argv):
             profiles.update(load_profiles(profile_path))
             profile_symlinks.update(get_symlinks(profile_path))
             read_config(options, profile_path)
-        # Sort by descending mtime
-        profiles = OrderedDict(sorted(profiles.items(), key=lambda x: -x[1]["config-mtime"]))
     except Exception as e:
         raise AutorandrException("Failed to load profiles", e)
 
-    profile_symlinks = {k: v for k, v in profile_symlinks.items() if v in (x[0] for x in virtual_profiles) or v in profiles}
-
     exec_scripts(None, "predetect")
-    config, modes = parse_xrandr_output()
+
+    ignore_lid = "--ignore-lid" in options
+
+    config, modes = parse_xrandr_output(
+        ignore_lid=ignore_lid,
+    )
+
+    if "--match-edid" in options:
+        update_profiles_edid(profiles, config)
+
+    # Sort by mtime
+    sort_direction = -1
+    if "--cycle" in options:
+        # When cycling through profiles, put the profile least recently used to the top of the list
+        sort_direction = 1
+    profiles = OrderedDict(sorted(profiles.items(), key=lambda x: sort_direction * x[1]["config-mtime"]))
+    profile_symlinks = {k: v for k, v in profile_symlinks.items() if v in (x[0] for x in virtual_profiles) or v in profiles}
 
     if "--fingerprint" in options:
         output_setup(config, sys.stdout)
@@ -1184,14 +1453,21 @@ def main(argv):
         if options["--save"] in (x[0] for x in virtual_profiles):
             raise AutorandrException("Cannot save current configuration as profile '%s':\n"
                                      "This configuration name is a reserved virtual configuration." % options["--save"])
+        error = check_configuration_pre_save(config)
+        if error:
+            print("Cannot save current configuration as profile '%s':" % options["--save"])
+            print(error)
+            sys.exit(1)
         try:
             profile_folder = os.path.join(profile_path, options["--save"])
-            save_configuration(profile_folder, config)
+            save_configuration(profile_folder, options['--save'], config, forced="--force" in options)
             exec_scripts(profile_folder, "postsave", {
                 "CURRENT_PROFILE": options["--save"],
                 "PROFILE_FOLDER": profile_folder,
                 "MONITORS": ":".join(enabled_monitors(config)),
             })
+        except AutorandrException as e:
+            raise e
         except Exception as e:
             raise AutorandrException("Failed to save current configuration as profile '%s'" % (options["--save"],), e)
         print("Saved current configuration as profile '%s'" % options["--save"])
@@ -1248,23 +1524,32 @@ def main(argv):
             "CURRENT_PROFILES": ":".join(current_profiles)
         }
 
+        best_index = 9999
         for profile_name in profiles.keys():
             if profile_blocked(os.path.join(profile_path, profile_name), block_script_metadata):
-                if "--current" not in options and "--detected" not in options:
+                if not any(opt in options for opt in ("--current", "--detected", "--list")):
                     print("%s (blocked)" % profile_name)
                 continue
             props = []
+            is_current_profile = profile_name in current_profiles
             if profile_name in detected_profiles:
-                props.append("(detected)")
-                if ("-c" in options or "--change" in options) and not load_profile:
-                    load_profile = profile_name
+                if len(detected_profiles) == 1:
+                    index = 1
+                    props.append("(detected)")
+                else:
+                    index = detected_profiles.index(profile_name) + 1
+                    props.append("(detected) (%d%s match)" % (index, ["st", "nd", "rd"][index - 1] if index < 4 else "th"))
+                if index < best_index:
+                    if "-c" in options or "--change" in options or ("--cycle" in options and not is_current_profile):
+                        load_profile = profile_name
+                        best_index = index
             elif "--detected" in options:
                 continue
-            if profile_name in current_profiles:
+            if is_current_profile:
                 props.append("(current)")
             elif "--current" in options:
                 continue
-            if "--current" in options or "--detected" in options:
+            if any(opt in options for opt in ("--current", "--detected", "--list")):
                 print("%s" % (profile_name, ))
             else:
                 print("%s%s%s" % (profile_name, " " if props else "", " ".join(props)))
@@ -1273,7 +1558,7 @@ def main(argv):
 
     if "-d" in options:
         options["--default"] = options["-d"]
-    if not load_profile and "--default" in options and ("-c" in options or "--change" in options):
+    if not load_profile and "--default" in options and ("-c" in options or "--change" in options or "--cycle" in options):
         load_profile = options["--default"]
 
     if load_profile:
@@ -1292,7 +1577,7 @@ def main(argv):
                 scripts_path = profile["path"]
             except KeyError:
                 raise AutorandrException("Failed to load profile '%s': Profile not found" % load_profile)
-            if load_profile in detected_profiles and detected_profiles[0] != load_profile:
+            if "--dry-run" not in options:
                 update_mtime(os.path.join(scripts_path, "config"))
         add_unused_outputs(config, load_config)
         if load_config == dict(config) and "-f" not in options and "--force" not in options:
@@ -1325,7 +1610,9 @@ def main(argv):
             raise AutorandrException("Failed to apply profile '%s'" % load_profile, e, True)
 
         if "--dry-run" not in options and "--debug" in options:
-            new_config, _ = parse_xrandr_output()
+            new_config, _ = parse_xrandr_output(
+                ignore_lid=ignore_lid,
+            )
             if not is_equal_configuration(new_config, load_config):
                 print("The configuration change did not go as expected:")
                 print_profile_differences(new_config, load_config)