Hello, I’m trying to dust off my then-stable Linux machine after about 1.5 years of no use, only to find that the desktop is extremely sluggish on my UWQHD 120 Hz monitor, especially resizing windows and scrolling. Changing the latency/quality value in the compositor has no effect. I tried Wayland but it only locked my monitor to 60 Hz without exposing any other display modes, made my nvidia-settings a lot simplified (I couldn’t even enable GSync) and all desktop animations seemed to be capped at 30 FPS or lower, so I switched back to X.
Tested with Manjaro KDE LiveCD as well, got same results with proprietary drivers, open source were slightly better but still not nearly as smooth as my Windows running on the same rig, and the screen turned black when I raised my screen to my native 120 Hz (100 Hz was the most that worked). And that still didn’t make all animations fast, especially GTK4 apps like Pamac were extremely slow or produced black banding inside the windows when I resized it. Turning off transparency effects on window move/resize didn’t help.
Is all this (considering my high-end gaming hw) normal for KDE or is there something I can try to make it snappier? I uninstalled and re-installed the drivers with
sudo mhwd -a pci nonfree 0300, didn’t help.
GPU RTX 3090
CPU AMD 5800X3D
RAM 64GB 3600 MHz
Primary monitor connected with DP, enabling built-in FPS meter always shows 120.
$ glxinfo | grep -i nvidia
server glx vendor string: NVIDIA Corporation
client glx vendor string: NVIDIA Corporation
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: NVIDIA GeForce RTX 3090/PCIe/SSE2
OpenGL core profile version string: 4.6.0 NVIDIA 545.29.06
OpenGL core profile shading language version string: 4.60 NVIDIA
OpenGL version string: 4.6.0 NVIDIA 545.29.06
OpenGL shading language version string: 4.60 NVIDIA
OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 545.29.06