Bug 491219 - fifo-v1 and commit-timing-v1 need to be implemented for SDL v3 to run in Wayland mode
Summary: fifo-v1 and commit-timing-v1 need to be implemented for SDL v3 to run in Wayl...
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (other bugs)
Version First Reported In: 6.1.3
Platform: Fedora RPMs Linux
: NOR task
Target Milestone: ---
Assignee: KWin default assignee
URL: https://github.com/libsdl-org/SDL/pul...
Keywords: wayland-only
Depends on:
Blocks:
 
Reported: 2024-08-03 14:27 UTC by Neal Gompa
Modified: 2025-11-28 18:09 UTC (History)
5 users (show)

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Description Neal Gompa 2024-08-03 14:27:02 UTC 
SUMMARY
SDL v3 will refuse to offer applications to run in native Wayland mode unless fifo-v1 and commit-timing-v1 are implemented by the compositor. As of right now, KWin doesn't have an implementation for this nor is one pending, presumably because the protocols are in draft status upstream. Please consider implementing the protocols and reviewing/acking the protocols upstream.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 40 (KDE Plasma)
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION
Mutter has an implementation ready to go: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3355
wlroots has one too: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4463

fifo-v1 protocol merge request: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/256
commit-timing-v1 protocol merge request: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/248
Comment 1 David Edmundson 2024-09-27 15:52:58 UTC 
We have some stuff pending but for other FIFO types, I don't think this is too useful in the format of a open bug report. Once mesa gets something we'll land something.
Comment 2 Henrik Harmsen 2025-11-28 11:03:44 UTC 
(In reply to David Edmundson from comment #1)
> We have some stuff pending but for other FIFO types, I don't think this is
> too useful in the format of a open bug report. Once mesa gets something
> we'll land something.

Mesa merged this a year ago: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26150
So any thoughts on the way forward with this?
Comment 3 Zamundaaa 2025-11-28 11:51:36 UTC 
fifo-v1 is supported since Plasma 6.4
Comment 4 Henrik Harmsen 2025-11-28 16:04:36 UTC 
(In reply to Zamundaaa from comment #3)
> fifo-v1 is supported since Plasma 6.4

Sorry for perhaps being unclear but what about commit-timing-v1 support in kwin?
Comment 5 Zamundaaa 2025-11-28 18:09:50 UTC 
It's not needed for anything yet.