Desktop Team Integration Squad Updates – Monday 10th February 2025

Project Discussion Desktop
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Hi everyone, below you will find updates from the Desktop team’s Integration squad from the last week. If you’re interested in discussing a topic please start a thread in the Desktop area of Discourse.

Last week’s notes are here: Desktop Team Integration Squad Updates – Monday 3rd February 2025

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  • Triple buffering for GNOME 48:
    • Finally reproduced the screen freeze from last week but it seems to already be fixed in the triple buffering branch for 48. I can’t yet figure out how much would need to be backported to 47 but it might not matter since the problem only seems to occur on newer kernels >= 6.12.
    • Retested VRR in detail. It works but is still too broken to enable by default. That’s a bug on main, not in triple buffering.
    • Retested multi-GPU-multi-monitor in detail. No problems found other than an Nvidia 560 showstopper in Ubuntu 25.04, but that’s not related to triple buffering and is already resolved by releasing Nvidia 570.
    • Re-audited all the commits to ensure no rebase mistakes crept in.
    • Researched amdgpu visual glitches to confirm they’re not specific to triple buffering.
    • Fixed a screen freeze caused by a bad merge with the new Wayland ‘fifo’ and ‘commit-timing’ protocols in GNOME 48. The protocols themselves are only about 3 months old so only Wine 10.0’s new native Wayland driver was hitting the problem.
    • All discussions were resolved for a few days, but then a new discussion was opened today.
  • Spent more time debugging fullscreen direct scanout frame skips, not related to triple buffering but also not fixed by triple buffering. Now identified the two upstream latency optimizations causing the frame skips and working with upstream to fix them. A fix for one is already proposed.
  • Migrated from IRC to Matrix.
  • Lots of bug triage and user support in Launchpad and upstreams:
    Open Ubuntu Desktop Bugs
    Open Ubuntu Desktop Bugs1773×1012 289 KB
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  • Completed the jpeg-xl 0.11 transition in Ubuntu
  • Removed obsolete packages gnome-devel-docs and vino (not removed from Ubuntu yet)
  • Sponsored the Showtime app (after Matthias Geiger’s review) into the Debian NEW queue. GNOME is expected to switch from Totem to Showtime for GNOME 49 for their default video player app.
     
  • Packaged gimp 3.0 RC3 for Debian and Ubuntu
  • Add a dependency on gstreamer1.0-plugins-bad to the epiphany package so it can play popular web videos on Ubuntu by default.
  • Many uploads to Debian and Ubuntu for GNOME 48 Beta. Too many details to explain here, especially as I have more work to do before Ubuntu Feature Freeze.
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