Using kernel 6.11 I consistently get results like these from glmark2-wayland:
nouveau...: ~1000 FPS nvidia-550: ~8000 FPS nvidia-560: ~2000-4000 FPS but I can solve most of it with env __NV_DISABLE_EXPLICIT_SYNC=1 glmark2-wayland: nvidia-560: ~7000 FPS Though applying the same variable system-wide didn't fix desktop stutter. So that's a separate bug. Real time profile results suggest my desktop stutter is gnome-shell spending most (60%) of its time inside lock_front_buffer (also mentioned in https://gitlab.gnome.org/GNOME/mutter/-/issues/3461). TL;DR - I think there are two or three bugs here: 1. nvidia-560 is much slower than nvidia-550 in glmark2-wayland unless you set __NV_DISABLE_EXPLICIT_SYNC=1 2. nvidia-560 spends way too much of gnome-shell's real time (60%) inside gbm_surface_lock_front_buffer (called by lock_front_buffer). 3. nvidia-535 erratic results with different kernels (comment #9). Let's ignore that for now. ** Bug watch added: gitlab.gnome.org/GNOME/mutter/-/issues #3461 https://gitlab.gnome.org/GNOME/mutter/-/issues/3461 ** Changed in: mutter (Ubuntu) Status: New => In Progress -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers-560 in Ubuntu. https://bugs.launchpad.net/bugs/2081140 Title: [regression] Poor performance in Nvidia-560 Wayland sessions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2081140/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
