https://bugs.kde.org/show_bug.cgi?id=466312
Bug ID: 466312
Summary: enable and configure screen with xrandr = no desktop
Classification: Plasma
Product: plasmashell
Version: 5.27.1
Platform: Neon
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Multi-screen support
Assignee: plasma-b...@kde.org
Reporter: s_chriscoll...@hotmail.com
CC: aleix...@kde.org, notm...@gmail.com
Target Milestone: 1.0
SUMMARY
***
I have keyboard shortcuts set up to disable and enable my secondary monitor:
• disable: xrandr --output HDMI-0 --off
• enable: xrandr --output HDMI-0 --mode 1280x1024 --rate 75 --pos 1920x120
The secondary monitor is enabled on boot and works fine, but if I disable and
then re-enable the screen using the above shortcuts, the secondary monitor will
be black with no desktop functionality. The cursor will show up and I can drag
windows to it, but there are no wallpaper, icons, widgets, right-click menu,
etc. This is a regression that I suspect is pretty recent.
I was also able to reproduce this bug in Virtualbox using virtual screens and
adapting the xrandr commands accordingly. Restarting plasmashell restores the
secondary screen to full functionality.
***
STEPS TO REPRODUCE
1. Ensure both screens are enabled and functioning correctly.
2. Run xrandr to get the screen name, resolution, position and active screen
resolution & refresh rate. In my case, the line "HDMI-0 connected
1280x1024+1920+120" means screen name = "HDMI-0", resolution = "1280x1024", and
position = "+1920+120". The active resolution and refresh rate is marked with
an asterisk on the refresh rate. Use the values for your screen in the commands
below.
3. Disable the screen: xrandr --output HDMI-0 --off
4. Re-enable the screen: xrandr --output HDMI-0 --mode 1280x1024 --rate 75
--pos 1920x120
OBSERVED RESULT
The secondary screen (HDMI-0) is black with no desktop functionality.
EXPECTED RESULT
The secondary screen should behave normally.
SOFTWARE/OS VERSIONS
Linux: KDE neon 5.27
KDE Plasma Version: 5.27.1
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
ADDITIONAL INFORMATION
Video: EVGA NVIDIA GeForce GTX 980 Ti SC GAMING ACX 2.0+ w/ 6GB RAM
NVIDIA video driver: 515.86.01
Screen #1 (DVI-I-1, screen 0, marked as primary):
• Monitor: ASUS VG248QE 24" LCD Monitor
• Resolution: 1920 x 1280 @ 120 Hz
Screen #2 (HDMI-0, screen 1):
• Monitor: Dell P170Sb 17" LCD Monitor
• Resolution: 1280 x 1024 @ 75 Hz
• Position relative to Screen #1: +1920+120
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