After a few rounds of testing, I think there is different result to run
g-s-d with and without the "--debug" argument.
This is what I do:
kill -9 `pgrep "gnome-settings"`; gnome-settings-daemon --debug
And then press the video switch hotkey or super+p and observe if the
xrandr-plugin is called. There will be log like:
(gnome-settings-daemon:21343): xrandr-plugin-DEBUG: applying
=== Applying Configuration Configuration ===
Clone: false
Output: (null) attached to VGA1
status: off
width: -1
height: -1
rate: -1
primary: false
position: -1 -1
Output: BenQ 22" attached to HDMI1
status: on
width: 1920
height: 1080
rate: 60
primary: true
position: 0 0
Output: (null) attached to DP1
status: off
width: -1
height: -1
rate: -1
primary: false
position: -1 -1
(gnome-settings-daemon:21343): xrandr-plugin-DEBUG: done handling fn-f7
However when testing without killing the g-s-d process first and without the
--debug argument. The video switch does not work.
This could be a race of grabbing the key or some timing issue as it
seems.
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https://bugs.launchpad.net/bugs/950160
Title:
Keyboard function key to switch between monitors no more works
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