I've a 1920x1080 resolution set on a 4K laptop screen. In Kwin master (773384b59f), Plasma is being rendered in only 1/4th of the laptop screen, as you can see in the attached photo. Downgrading to commit a23d23593b (from April) fixes the rendering to the full screen as expected. I have not been able to do a git bisect between these two commits yet to figure out the first bad commit. If a fix is not immediately obvious, let me know and I'll try to perform the git bisect sometime later. SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.25.80 KDE Frameworks Version: 5.95.0 Qt Version: 5.15.4 Kernel Version: 5.17.9-arch1-1 (64-bit) Graphics Platform: X11 Processors: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz Graphics Processor: Mesa Intel® Xe Graphics
Created attachment 149097 [details] kwin incorrect scaling
A more precise bisect would be lovely, if you can manage it.
So the first bad commit is a4a2ee042 Refactor output mode abstractions. It's parent commit 6b4daeddc9 works okay for me.
Here is my xrandr output. In master, setting resolution to "3840x2160" works but not for "1920x1080". Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 174mm 3840x2160 60.00 + 59.97 3200x1800 59.96 59.94 2880x1620 59.96 59.97 2560x1600 59.99 59.97 2560x1440 59.99 59.96 59.95 2048x1536 60.00 1920x1440 60.00 1856x1392 60.01 1792x1344 60.01 2048x1152 59.99 59.98 59.90 59.91 1920x1200 59.88 59.95 1920x1080 60.01* 59.97 59.96 59.93 1600x1200 60.00 1680x1050 59.95 59.88 1400x1050 59.98 1600x900 59.99 59.94 59.95 59.82 1280x1024 60.02 1400x900 59.96 59.88 1280x960 60.00 1440x810 60.00 59.97 1368x768 59.88 59.85 1280x800 59.99 59.97 59.81 59.91 1280x720 60.00 59.99 59.86 59.74 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 1024x576 59.95 59.96 59.90 59.82 960x600 59.93 60.00 960x540 59.96 59.99 59.63 59.82 800x600 60.00 60.32 56.25 840x525 60.01 59.88 864x486 59.92 59.57 700x525 59.98 800x450 59.95 59.82 640x512 60.02 700x450 59.96 59.88 640x480 60.00 59.94 720x405 59.51 58.99 684x384 59.88 59.85 640x400 59.88 59.98 640x360 59.86 59.83 59.84 59.32 512x384 60.00 512x288 60.00 59.92 480x270 59.63 59.82 400x300 60.32 56.34 432x243 59.92 59.57 320x240 60.05 360x202 59.51 59.13 320x180 59.84 59.32 HDMI-1 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) DP-4 disconnected (normal left inverted right x axis y axis)
*** This bug has been marked as a duplicate of bug 453696 ***