Created attachment 171837 [details] Bug video SUMMARY When the browser is launched, the mouse cursor starts drawing artifacts on the screen, all this is accompanied by flickering and slow startup. This happens with both Chromium Flatpak and RPM. STEPS TO REPRODUCE 1. Launch your browser SOFTWARE/OS VERSIONS Operating System: Fedora Linux 40 KDE Plasma Version: 6.1.2 KDE Frameworks Version: 6.3.0 Qt Version: 6.7.2 Kernel Version: 6.9.9-200.fc40.x86_64 (64-bit) Graphics Platform: Wayland Processors: 12 × 11th Gen Intel® Core™ i5-11400H @ 2.70GHz Memory: 15.3 ГиБ of RAM Graphics Processor: Mesa Intel® UHD Graphics dGPU: NVIDIA GeForce RTX 3060 Laptop GPU Driver: 555.58.02 Manufacturer: HP Product Name: Victus by HP Laptop ADDITIONAL INFORMATION This happens in all (or almost) Chromium browsers. Google Chrome, Brave... This bug does not exist in the X11 session. Also there is no bug when running "chromium-browser --ozone-platform=wayland"
Created attachment 171838 [details] console output
It's a _NET_WM_SYNC_REQUEST handling issue, it doesn't work properly with Xwayland clients atm. BUT it's also worth pointing out that neither web browser properly handles _NET_WM_SYNC_REQUEST either. *** This bug has been marked as a duplicate of bug 486464 ***