Thank you for the report. I noted this in https://wiki.ubuntu.com/DesktopTeam/TestPlans/Mutter for future updates that rely on the exception. Would it be appropriate to add this Test Plan to future mutter updates that are based on the exception? If so, please could you amend the wiki? Thanks!
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2023363 Title: Mouse input latency in GNOME 44.1 Wayland sessions is one frame higher than it was in 44.0 and earlier Status in mutter package in Ubuntu: In Progress Status in mutter source package in Lunar: Triaged Status in mutter source package in Mantic: In Progress Bug description: [ Impact ] Mouse input latency in Wayland sessions is slightly higher in 23.10 than 22.04 at the moment. I might be imagining things and it does feel like only one frame higher latency. But experimenting with MUTTER_DEBUG_TRIPLE_BUFFERING seems to confirm my suspicion: BAD: MUTTER_DEBUG_TRIPLE_BUFFERING=auto (the Ubuntu default) BAD: MUTTER_DEBUG_TRIPLE_BUFFERING=always GOOD: MUTTER_DEBUG_TRIPLE_BUFFERING=never [ Test Plan ] 0. Find a machine with an Intel GPU. 1. Add this to /etc/environment: CLUTTER_DEBUG=frame-timings 2. Reboot. 3. Log in to a Wayland session and wait for the desktop to become idle. 4. Also log in via ssh from a remote machine and run: journalctl -f /usr/bin/gnome-shell 5. Over your idle desktop just wiggle the mouse continuously. 6. In your ssh login, verify that the resulting log messages from gnome-shell say "[FRAME_TIMINGS]: Double buffering:" and not "[FRAME_TIMINGS]: Triple buffering:" when only the mouse pointer is moving. [ Where problems could occur ] In the frame rate and latency of the Ubuntu desktop experience. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2023363/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
