Enable xrandr outputs one-by-one, --pos 0x0 first

Enabling more than one or two outputs at once may result in this error:
/usr/bin/xrandr: Configure crtc 1 failed
This happens on my Dell Latitude E7440 with three monitors connected.

Disabling many outputs at once still seems safe.

Output positioning may be ignored by xrandr in some cases.
To circumvent this, make sure the output with --pos 0x0 is enabled first.

diff --git a/autorandr b/autorandr
index ef750e2b2aba218d86287f4e67e2337c876f4377..5937f8a2a8ad3ded1cd9dd27a3d9d7b3535b1bcf 100755 (executable)
--- a/autorandr
+++ b/autorandr
@@ -277,26 +277,34 @@ config_equal() {
 load_cfg_xrandr() {
        # sed 1: Prefix arguments with "--"
        # sed 2: Merge arguments into one line per output
-       # sed 3: Merge into two lines, all --off outputs in the first one
+       # sed 3:  * Merge all --off outputs into the first line
+       #         * Place the output with --pos 0x0 on the second line
+       #         * Remaining outputs are appended as they appear
+       #         * Keep everything in hold buffer until the last line
+       # sed 4: Remove empty lines caused by G and H on empty hold buffer
        sed 's/^/--/' "$1" | sed -e '
                :START
                /\n--output/{P;D}
                s/\n/ /
                N;bSTART' | sed -e '
-                       ### First line
                        / --off/{
                                G
-                               # Merge if next line contains --off
+                               # Merge with next line if it contains --off
                                s/\n\([^\n]* --off\)/ \1/
                                h
                                $!d;b
                        }
-                       ### Last line
-                       H;x
-                       # Merge if previous line contains --mode
-                       s/\(--mode [^\n]*\)\n/\1 /
-                       h
-                       $!d' | xargs -L 1 $XRANDR
+                       / --pos 0x0/{
+                               G
+                               # Swap lines 1 and 2 if --off is found
+                               / --off/ s/^\([^\n]*\)\n\([^\n]*\)/\2\n\1/
+                               h
+                               $!d;b
+                       }
+                       H
+                       $!d
+                       x' | sed -e '
+                               /./ !d' | xargs -L 1 $XRANDR
 }
 
 load_cfg_disper() {