I switched to Kubuntu 25.10 on my desktop from Windows 10 and every since, I’ve noticed that Linux on my primary monitor has felt very choppy with a low FPS. Animations are choppy and slow. As soon as I drag it to my second monitor, everything is faster and has higher FPS. This doesn’t happen on Windows. testufo.com shows ~20fps on the problematic monitor I also haven’t noticed this behavior with any other programs. There are spikes to 50fps and smoother animations when I open the Firefox menu, but then it goes back to 20fps. Chromium on the same monitor is faster and shows 50+fps. Games on this monitor also are higher fps
The primary monitor is configured to 60Hz, the second monitor is 143.97Hz. I’ve got an Nvidia GeForce 2070 with the NVIDIA driver (open kernel) metapackage from nvidia-driver-580-open installed, 32GB of RAM, plenty of CPU, and no other programs or tabs open even.
What could cause this issue and how can I fix it?
Interesting. I played around with X11 vs Wayland settings just to see what different configurations give me
MOZ_ENABLE_WAYLAND=1 /snap/bin/firefox- Exhibits low FPS issueMOZ_ENABLE_WAYLAND=0 DISABLE_WAYLAND=1 /snap/bin/firefox- Actually feels fast like it should be. Most animations feel faster, some are still choppy though. It’s hard to tell.It seems like running with X11 sort of the problem? Which seems unexpected and concerns me since I know distros are starting to default to Wayland.