Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: mutter (Ubuntu Lunar)
Status: Fix Committed => Won't Fix
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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:
Won't Fix
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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