https://bugs.kde.org/show_bug.cgi?id=490123
Bug ID: 490123
Summary: sometimes SDDM starts in 640x480
Classification: Plasma
Product: plasmashell
Version: 6.1.2
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Startup process
Assignee: plasma-b...@kde.org
Reporter: mig...@rozsas.eng.br
CC: k...@davidedmundson.co.uk
Target Milestone: 1.0
Created attachment 171581
--> https://bugs.kde.org/attachment.cgi?id=171581&action=edit
screen capture showing the second monitor at 640x480
This is happening since KDE 6.0.0.
This bug is not deterministic. It happens in 3 of 10 times, no clue what
triggers it.
A simple fix is remove the video cable from video card e reconnect it. Just
power off/power on the affected monitor didn't help.
SUMMARY
Sometimes, SDDM starts in 640x480 in both monitors.
If I power off the computer and monitors and try again, usually works, with
SDDM starting in 1920x1080 (the native resolution of both screens)
If I log in anyway, the first/primary monitor is adjusted to 1920x1080, but the
second still is in 640x480.
Then, I remove the cable from the second monitor and reconnect it and the
monitor gets 1920x1080 as expected.
STEPS TO REPRODUCE
1. Power on the computer, BIOS Logo is in the expected size
2. Sometimes SDDM starts in both monitors as 640x480
3. Log in anyway and the primary monitor gets 1920x1080, but not the secondary
monitor
4 . Remove the video cable from second monitor and reconnect to get it in
expected native resolution of 640x480
OBSERVED RESULT
Monitors are set in 640x480
EXPECTED RESULT
Monitors are set in 640x480
Check the attachment: a screen capture showing the problem on the second
monitor, just after login.
It is not possible to take a screenshot from SDDM, but at that time, both
monitors were at 640x480.
It is not possible to fix/adjust the second monitor by KDE control center.
After removing the video cable from second monitor and plug in back, it was
restored to its native resolution, 1920x1080, just as the first one.
The primary monitor is a Samsung C27F390 (HDMI)
The secondary monitor is a Dell U2312HM (DP1)
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20240709
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Kernel Version: 6.9.7-1-default (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 7600X 6-Core Processor
Memory: 30.6 GiB of RAM
Graphics Processor: AMD Radeon RX 6600
expected normal xrandr output:
Screen 0: minimum 16 x 16, current 3840 x 1080, maximum 32767 x 32767
DP-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis)
510mm x 287mm
1920x1080 59.96*+
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.52
1680x1050 59.95
1440x900 59.89
1280x800 59.81
1152x720 59.97
960x600 59.63
928x580 59.88
800x500 59.50
768x480 59.90
720x480 59.71
640x400 59.95
320x200 58.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
HDMI-A-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y
axis) 598mm x 336mm
1920x1080 59.96*+
1440x1080 59.99
1400x1050 59.98
1280x1024 59.89
1280x960 59.94
1152x864 59.96
1024x768 59.92
800x600 59.86
640x480 59.38
320x240 59.52
1680x1050 59.95
1440x900 59.89
1280x800 59.81
1152x720 59.97
960x600 59.63
928x580 59.88
800x500 59.50
768x480 59.90
720x480 59.71
640x400 59.95
320x200 58.96
1600x900 59.95
1368x768 59.88
1280x720 59.86
1024x576 59.90
864x486 59.92
720x400 59.55
640x350 59.77
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