According to upstream, the fix for this bug can't safely be applied to
releases before 44.0
(https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3080#note_1772454)
so I just *hope* nobody encounters this bug on jammy.
** Changed in: mutter (Ubuntu)
Status: Triaged => Fix Committed
** Changed in: mutter (Ubuntu)
Status: Fix Committed => In Progress
** Tags added: fixed-in-mutter-45 fixed-upstream
** Also affects: mutter (Ubuntu Mantic)
Importance: High
Assignee: Daniel van Vugt (vanvugt)
Status: In Progress
** Also affects: mutter (Ubuntu Lunar)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu Lunar)
Importance: Undecided => High
** Changed in: mutter (Ubuntu Lunar)
Status: New => Triaged
** Summary changed:
- [Lunar] Irregular FPS with Path of Exile
+ Irregular frame rate in some fullscreen games
** Also affects: mutter (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: mutter (Ubuntu Jammy)
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/2016990
Title:
Irregular frame rate in some fullscreen games
Status in Mutter:
New
Status in mutter package in Ubuntu:
In Progress
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:
In Progress
Bug description:
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.
Kernel: 6.2.0-1003-lowlatency
GPU: Radeon 6800 XT
CPU: Ryzen 9 5900X
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