** Description changed: + [ Impact ] + Debug mode MUTTER_DEBUG_TRIPLE_BUFFERING=always doesn't result in triple buffering being used anymore. + + [ Test Plan ] + + 1. Add MUTTER_DEBUG_TRIPLE_BUFFERING=always to /etc/environment + 2. Reboot. + 3. Log into a Wayland session. + 4. Open a Terminal window and drag it in circles with the mouse. + 5. Verify there is a slight lag between the mouse pointer position and the window position. This means it's always triple buffering (or you accidentally logged into a Xorg session). + + [ Where problems could occur ] + + Anywhere in frame scheduling, including screen freezes and stutter. + + [ Other Info ] + + This regression occurred in 46.0 as a result of jbicha and myself + working a little too independently. Jeremy identified that the upstream + branch supported 46 and cherry-picked that for the Noble release, while + I was still working on creating a stable maintenance branch for 46 in + https://gitlab.gnome.org/Community/Ubuntu/mutter/-/tree/triple- + buffering-v4-46 + + Fortunately it's very low priority and nobody has actually reported it.
** Tags added: regression-release -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2070437 Title: Debug mode MUTTER_DEBUG_TRIPLE_BUFFERING=always doesn't work anymore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2070437/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
