SUMMARY Visual artifacts on monitor that uses 100% scale when using custom (both fractional and integer) scaling on a second monitor. Everything does look fine on the second monitor though. STEPS TO REPRODUCE 1. Have a multi monitor setup (tested on 2 monitors) 2. Set 1 monitor to a custom scale (150% and 200% were tested so far), 1 monitor to 100% 3. Open the setting app, check the fonts (tested with various fonts) 4. Hover the mouse pointer over the window decoration. It should look distorted (tested with Adwaita, Capitaine & WhiteSur cursor themes) 5. Right click on the desktop on the 100% scale monitor and hover over the submenus. Some areas should go transparent/flicker for no reason. (tested with Breeze-dark and WhiteSur themes) 6. Clicking in the topbar sometimes doesn't show anything or go transparent/flicker. (tested with latte-dock-git r5033 & Plasma panels) OBSERVED RESULT See reproduce steps above. EXPECTED RESULT Everything on the monitor that's running on 100% scale next to a monitor with custom scale, should look exactly the same as it would normally, without a custom scaled monitor or without a second monitor at all. (no artifacts) SOFTWARE/OS VERSIONS Operating System: Arch Linux x86_64 Kernel version: 5.11.1-zen1-1-zen KDE Plasma Version: 5.21.1 KDE Frameworks Version: 5.79.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Graphics Platform: Wayland GPU: AMD Radeon 6900XT with Mesa driver 20.3.4.0 Video here https://youtu.be/E30cim44Gv0
Can you please attach a screenshot or image that shows the issue? Are you using X11 or Wayland? If you're using X11, does it work properly on Wayland?
Created attachment 136123 [details] Fonts distorted
Created attachment 136124 [details] Submenu's in desktop right click menu Right click menu in desktop goes partially transparent when hovering over a sub menu, and causes flickering.
Created attachment 136125 [details] Submenu's in topbar Also partially going transparent and flickering when hovering over a sub menu.
(In reply to Nate Graham from comment #1) > Can you please attach a screenshot or image that shows the issue? Are you > using X11 or Wayland? If you're using X11, does it work properly on Wayland? Using Wayland. Per monitor scaling does not work in X11 (at least not supported by kscreen) Watch the video mentioned under Additional information for a better look at the situation
There is already a bug report to track the issue where context menus have invisible items: bug 432264 As for distored fonts, it looks like a client side bug. kwin doesn't apply any filters that can distort them that way.
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Ah yes, the distorted fonts would be an example of Bug 414266. *** This bug has been marked as a duplicate of bug 414266 ***