** Description changed: - There is heavy stuttering visible in Firefox with mutter 45.1/45.2. This - is a regression introduced upstream in mutter 45.1 (8f27ebf8), although - it only hurts the triple buffering patch so that's where it's fixed: + [ Impact ] + + There is heavy stuttering visible in Firefox with mutter 45.1/45.2 when + kinetic scrolling a non-animated web page with a touchpad. This is a + regression introduced upstream in mutter 45.1 (8f27ebf8). + + [ Test Plan ] + + 0. Find a laptop with a touchpad. + 1. Open a simple web page like a Wikipedia page in Firefox. + 2. Use two fingers on the touchpad to fling it so it continues scrolling. + + Expect: The scrolling proceeds and slows perfectly smoothly. + + [ Where problems could occur ] + + Anywhere in frame scheduling (visual smoothness), since that is the code + affected. + + [ Other Info ] + + Since the bug only hurts the triple buffering patch, that's where it has + been fixed upstream: https://gitlab.gnome.org/Community/Ubuntu/mutter/-/commit/0b896518b2028d9c4d6ea44806d093fd33793689 https://gitlab.gnome.org/Community/Ubuntu/mutter/-/commits/triple-buffering-v4-45 [ Workaround ] In /etc/environment: MUTTER_DEBUG_TRIPLE_BUFFERING=always or "never" also works. Just not "auto".
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2046360 Title: Heavy stuttering in Firefox with mutter 45.1/45.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2046360/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
