https://bugs.kde.org/show_bug.cgi?id=361799
Bug ID: 361799
Summary: Crashes/visual curruption/lost windows on HIGH-dpi
(4k) scaled multiscreen
Product: kwin
Version: 5.5.4
Platform: Ubuntu Packages
OS: Linux
Status: UNCONFIRMED
Severity: crash
Priority: NOR
Component: xrandr
Assignee: kwin-bugs-n...@kde.org
Reporter: hawk...@tiscali.it
When using the fixDisplay.sh script I get a working extended desktop on my
laptop's HDMI-attached external screen. The three (related ?) problems I get
are:
As soon as I run the script I (sometimes) in one random case of the following:
1) end up with an Xorg crash (problem1)
2) end up with some of the open windows disappearing (not on any
display/desktop/activity), but the processes are still running and it is still
possible to list the x window ID
3) kwin works ok for a while (problem2)
While kwin is working I get reversible and temporary visual corruptions
(expecially in konsole) while scrolling.
I have a patched Xorg xorg-server-1.17.2 (because of a bug related to randr
and scaling)
xrandr -q
Screen 0: minimum 8 x 8, current 7680 x 4320, maximum 32767 x 32767
eDP1 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis)
344mm x 194mm
3840x2160 60.00*+ 48.00
3200x1800 60.00
2880x1620 60.00
2560x1440 60.00
2048x1536 60.00
1920x1440 60.00
1856x1392 60.01
1792x1344 60.01
2048x1152 60.00
1920x1200 59.95
1920x1080 60.00 59.93
1600x1200 60.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 60.00
1280x1024 60.02
1440x900 59.89
1280x960 60.00
1368x768 60.00
1360x768 59.80 59.96
1152x864 60.00
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
640x360 60.00
HDMI1 connected 3840x2160+3840+0 (normal left inverted right x axis y axis)
443mm x 249mm
1600x900 60.00*+
1280x1024 60.02
1440x900 59.90
1280x720 60.00
1024x768 60.00
800x600 60.32
640x480 60.00
720x400 70.08
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
Reproducible: Sometimes
Steps to Reproduce:
1. run the patched xorg (not sure this prerequisite is ncessary)
2. attach a secondary screen
3. run the script
Actual Results:
crash/corruption/visual problems
Expected Results:
The external screen should just work after just running xrandr, without the
need to kill kwin and kwin should not present the described problems.
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