Created attachment 165059 [details] Video showing the artifacts I got a new monitor and I started experiencing visual artifacts while dragging windows, specially if the window being dragged overlaps with the taskbar. The taskbar displays some flickering, and the window displays some crazy tearing/rectangular holes. Difficult to explain in words, please see attached video for clarification. For me this only happens on the 4k resolution (3840x2160) AND using refresh rates either 144Hz or 160Hz, AND using 150% scaling factor (might happen on other scaling factor). If I put 4k 120Hz or below, the bug doesn't trigger, it needs at least 144Hz to trigger. If I lower the resolution to anything below 4k, it doesn't happen. If I use 100% scaling, it doesn't happen, even on 4k 160Hz. So you need these 3 conditions to trigger it: 4k, 144Hz+, and a scaling factor like 150%. STEPS TO REPRODUCE 1. Own a 4k+high refresh rate monitor 2. Set the resolution to 4k, the refresh rate to at least 144Hz, and the global scaling factor to 150%. 3. Drag some window overlapping the taskbar OBSERVED RESULT Crazy tearing/rectangular holes on the window being dragged, and flickering on the taskbar. EXPECTED RESULT Smooth dragging with no artifacts SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.27.10 KDE Frameworks Version: 5.114.0 Qt Version: 5.15.12 Kernel Version: 6.1.71-1-lts (64-bit) Graphics Platform: X11 Processors: 12 × Intel® Core™ i7-8700K CPU @ 3.70GHz Memory: 31,3 GiB of RAM Graphics Processor: NVIDIA GeForce RTX 4090/PCIe/SSE2 nVidia driver version 535.113.01
This is almost certainly a problem in the proprietary NVIDIA drivers. Please report this issue to the NVIDIA folks, either by sending an email to linux-bugs@nvidia.com or making a post at https://forums.developer.nvidia.com/c/gpu-graphics/linux. It would be helpful to the NVIDIA developers if you could run nvidia-bug-report.sh and attach the resulting file in your report. Thanks!