This bug was fixed in the package mutter - 44.2-3ubuntu1
---------------
mutter (44.2-3ubuntu1) mantic; urgency=medium
* Merge with Debian. Remaining changes:
- Add x11-Add-support-for-fractional-scaling-using-Randr.patch
- Add window-Add-ability-to-override-the-edge-constraints.patch
+ Make possible for extensions (such as Tiling Assistant) to override
window constraints
mutter (44.2-3) experimental; urgency=medium
* Cherry-pick patch to fix build test with mesa 23.1 (LP: #2025287)
mutter (44.2-2ubuntu1) mantic; urgency=medium
* Merge with Debian. Remaining changes:
- Add x11-Add-support-for-fractional-scaling-using-Randr.patch
- Add window-Add-ability-to-override-the-edge-constraints.patch
+ Make possible for extensions (such as Tiling Assistant) to override
window constraints
mutter (44.2-2) experimental; urgency=medium
[ Daniel van Vugt ]
* Cherry-pick 2 patches for stuttering fixes
* Avoid cursor stuttering over some windows (LP: #2023766). This will also
improve best-case input latency by roughly half a frame.
* Avoid render stuttering in some fullscreen games (LP: #2016990).
* Update Support-Dynamic-triple-double-buffering.patch
* Fix a failure to resume from sleep (frozen black screen), which seems
to be an old bug but only became likely in 44.1.
* Fix a crash on resume from sleep (LP: #2020049).
-- Jeremy Bícha <[email protected]> Wed, 28 Jun 2023 15:31:07 -0400
** Changed in: mutter (Ubuntu Mantic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2016990
Title:
Irregular frame rate in some fullscreen games
Status in Mutter:
Fix Released
Status in mutter package in Ubuntu:
Fix Released
Status in mutter source package in Jammy:
Won't Fix
Status in mutter source package in Lunar:
Triaged
Status in mutter source package in Mantic:
Fix Released
Bug description:
[ Impact ]
I'm having a strange issue with the game Path of Exile (free). With Ubuntu
Wayland session, vsync on, I get very irregular frame rates, it jumps around 40
fps.
If I switch to Plasma Wayland the game is very smooth 60 fps.
I'm running the game from Steam with Proton. I've tried Proton Experimental
and Proton 8.0 so far, no difference.
The game uses Vulkan so I guess it's being allowed to set up all the swap and
presentation stuff pretty much itself... ?
MUTTER_DEBUG_DISABLE_TRIPLE_BUFFERING=1 doesn't help Mutter so it's
not strictly related to triple buffering, which makes sense since it's
a full screen game anyway.
[ Test Plan ]
None known, other than the OP to run the game.
[ Where problems could occur ]
In rendering performance of fullscreen apps/games.
[ Workaround ]
Add this to /etc/environment:
CLUTTER_PAINT=disable-dynamic-max-render-time
[ Other Info ]
Kernel: 6.2.0-1003-lowlatency
GPU: Radeon 6800 XT
CPU: Ryzen 9 5900X
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