SUMMARY The entire desktop moves to the left when the mouse goes to the right side of the desktop. STEPS TO REPRODUCE 1. Run plasma 2. Move mouse to the right side 3. Profit OBSERVED RESULT The desktop moves to the right side. EXPECTED RESULT The desktop should not move. SOFTWARE/OS VERSIONS Linux/KDE Plasma: ArchLinux KDE Plasma Version: 5.27.7 KDE Frameworks Version: 5.109.0 Qt Version: 5.15.10 ADDITIONAL INFORMATION
Created attachment 161412 [details] video
From a chat with the reporter, it seems it's affected just the plasma desktop and panel, normal application windows stay still, but plasma popups such as the calendar are affected as well. Problem happens on X11.
(In reply to Marco Martin from comment #2) > From a chat with the reporter, it seems it's affected just the plasma > desktop and panel, normal application windows stay still, but plasma popups > such as the calendar are affected as well. > > Problem happens on X11. correction: every window moves this way, also applications
xrandr -q output: Screen 0: minimum 8 x 8, current 8704 x 2160, maximum 32767 x 32767 DVI-D-0 disconnected (normal left inverted right x axis y axis) HDMI-0 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 600mm x 340mm 3840x2160 60.00*+ 59.94 50.00 30.00 29.97 25.00 23.98 2560x1440 59.95 1920x1080 60.00 59.94 50.00 29.97 23.98 1600x900 60.00 1280x1024 60.02 1280x800 59.81 1280x720 60.00 59.94 1152x864 60.00 1024x768 60.00 800x600 60.32 720x576 50.00 720x480 59.94 640x480 59.94 59.93 DP-0 connected 3840x2160+3840+0 (normal left inverted right x axis y axis) 600mm x 340mm 3840x2160 60.00*+ 30.00 2560x1440 59.95 1920x1080 60.00 59.94 1600x900 60.00 1280x1024 60.02 1280x800 59.81 1280x720 60.00 59.94 1152x864 59.96 1024x768 60.00 800x600 60.32 720x480 59.94 640x480 59.94 59.93 DP-1 disconnected (normal left inverted right x axis y axis) None-1-1 connected (normal left inverted right x axis y axis) 1024x768 60.00 +
3840x2160 two times in a horizontal row does not add up to 8704 which is reported to be total screen size from XRandR point of view. But if you also add that disabled 1024x768 "None-1-1" output to the sum, you'll get exactly 8704 pixels total. Which means, xrandr failed to activate None-1-1, and stuck in a limbo state with screen size larger than the bounding rectangle covered by enabled outputs. Which automatically turns on "panning" — an intended feature of X11.
Going on the display window and setting again the display size fixed the issue.
So this is a monitor bug or an xrandr bug, or something else?