Created attachment 182041 [details] video SUMMARY With fractional scaling 1.25x if i right click near the very top of Firefox's maximized window i get a context menu which starts glitching out flashing semi-transparently as the mouse is moving over the elements. I can still click on the elements but there are graphical glitches. If i move my mouse even a little bit down context menu works correctly again. I've recorded a short demo. This does not happen without fractional scaling. It also doesn't happen on X11. Probably related links: https://bugs.kde.org/show_bug.cgi?id=466092 https://discuss.kde.org/t/weird-firefox-context-menu-issue-on-kde-wayland/16033 STEPS TO REPRODUCE 1. Use fractional scaling like 1.25x on Wayland 2. Maximize Firefox's window 3. Right click near the very top of an open tab 4. Move mouse over the elements OBSERVED RESULT Context menu starts rapidly warping in and out as if it's opening and closing EXPECTED RESULT Context menu works reliably ADDITIONAL INFORMATION Operating System: Arch Linux KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.14.0 Qt Version: 6.9.0 Kernel Version: 6.14.9-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 7535HS with Radeon Graphics Graphics Processor 1: NVIDIA GeForce RTX 4050 Laptop GPU Graphics Processor 2: AMD Radeon 660M
Cannot reproduce on current git master with Firefox 139 and 175% scale.
Some additional info: Firefox 139. Also tested with a clean profile. Also present with 175% scaling for me.
I can reproduce on current git master with Firefox 139 and 125% scale. It doesn't happen with 100% This is on a laptop display with 1920 x 1080 resolution Operating System: Solus 4.7 KDE Plasma Version: 6.4.80 KDE Frameworks Version: 6.15.0 Qt Version: 6.8.3 Kernel Version: 6.14.6-319.current (64-bit) Graphics Platform: Wayland Processors: 8 × AMD Ryzen 7 3700U with Radeon Vega Mobile Gfx Memory: 20 GiB of RAM (17.5 GiB usable) Graphics Processor: AMD Radeon Vega 10 Graphics Manufacturer: LENOVO Product Name: 81SS System Version: Lenovo IdeaPad FLEX-14API
Personally I can reproduce it in openSUSE Tumbleweed with Fx 139 and kwin 6.4.0 , no need for fractional scaling. Even 200% shows the issue. I can consistently reproduce the issue with any scaling value other than 100%. It is also not a recent regression. I also had the same issue for the entire kwin 6.3.x.