Fixed in mutter 44.1 which is now in Ubuntu 23.10
** Changed in: mutter (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2017137
Title:
Xorg sessions on Intel GPUs stutter noticeably in 23.04
Status in mutter package in Ubuntu:
Fix Released
Bug description:
[ Impact ]
Xorg sessions on Intel GPUs stutter noticeably in 23.04
Seems like a combination of:
* over-aggressive latency optimizations in the latest version of triple
buffering; and
* gnome-shell 44 being slightly less efficient at some operations like
scrolling the app grid.
[ Workaround ]
Add this to /etc/environment:
MUTTER_DEBUG_TRIPLE_BUFFERING=always
[ Test Plan ]
1. Find a machine with an Intel GPU.
2. Log into 'Ubuntu on Xorg'.
3. Press Super+A and scroll the icon right left/right. It should be
perfectly smooth like in Wayland sessions.
[ Where problems could occur ]
Triple buffering affects all frame scheduling so any mistakes can
cause high CPU usage, screen freezes and stutter. Try not to make
mistakes.
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