Created attachment 171581 [details] 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
ON STEPS TO REPRODUCE I MEANT: 4 . Remove the video cable from second monitor and reconnect to get it in expected native resolution of 1920x1080
Sorry, at EXPECTED RESULT section I meant: Monitors are set in 1920x1080
Today, it happened again. The output of xrandr is : Screen 0: minimum 16 x 16, current 2560 x 1080, maximum 32767 x 32767 DP-1 connected 640x480+1920+0 (normal left inverted right x axis y axis) 0mm x 0mm 640x480 59.38*+ 320x240 59.52 640x400 59.20 320x200 58.96 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
Created attachment 171612 [details] Both monitors in 640x480 after second power on of this day. Both monitors in 640x480 after second power on of this day. After login, only the second monitor stays in 640x480. It returns to expected native resolution if I remove the video cable or the power cord.
SDDM isn't a KDE project, so in general SDDM bugs should be reported at https://github.com/sddm/sddm/issues/. In this case there's a chance it could be a KDE bug if SDDM is being started by kwin_wayland, but IIRC on openSUSE they still use X11 for this, which means no KDE code is involved by the time the bug happens, which means it's not a KDE bug.