** Description changed:
- I've just tried the Nvidia-560 driver for the first time and am seeing
- very poor performance in Wayland sessions. Just tapping the Super key I
- can see animations stuttering.
+ On a desktop with a single Nvidia GPU and single monitor, desktop
+ performance is poor in Wayland sessions.
- In 'NVIDIA Settings' it looks like the reason might be a lack of power
- profiles ("Performance Levels"). Those are only reported correctly if I
- log into Xorg. And indeed performance in Xorg sessions is much higher,
- more like what I would expect.
-
- P.S. Performance on this machine is much worse in upstream GNOME without
- triple buffering. So triple buffering is doing its job.
+ The main culprit seems to be that all rendering gets deferred until
+ meta_drm_buffer_gbm_new_lock_front by the Nvidia driver, which blocks
+ the main loop at a time we are not optimised to handle blocking.
ProblemType: Bug
DistroRelease: Ubuntu 24.10
Package: nvidia-driver-560 560.35.03-0ubuntu3
ProcVersionSignature: Ubuntu 6.11.0-7.7-generic 6.11.0-rc7
Uname: Linux 6.11.0-7-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.30.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
Date: Thu Sep 19 14:13:32 2024
InstallationDate: Installed on 2024-06-12 (99 days ago)
InstallationMedia: Ubuntu 24.10 "Oracular Oriole" - Daily amd64 (20240528)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: nvidia-graphics-drivers-560
UpgradeStatus: No upgrade log present (probably fresh install)
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https://bugs.launchpad.net/bugs/2081140
Title:
Poor performance in Nvidia Wayland sessions
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