ok - I've run a git bisect on https://salsa.debian.org/gnome- team/mutter/commits/upstream/3.28.x
dad@dad-VirtualBox:~/Downloads/mutter/mutter$ git bisect good 527f6ef8357f614793035a999ec4409ef02470e2 is the first bad commit commit 527f6ef8357f614793035a999ec4409ef02470e2 Author: Carlos Garnacho <carl...@gnome.org> Date: Sat Apr 29 11:43:33 2017 +0000 ClutterActor: Preserve valid paint volumes till the next relayout/repaint Cuts down approximately all paint volume calculations when there's windows that redraw frequently, but don't move. https://bugzilla.gnome.org/show_bug.cgi?id=782344 (cherry picked from commit 161d2540e659fa8ed5efc74f350a741b2430417d) :040000 040000 058f850980bad70fdd5792a46dbfc33c70fe88c6 bf54863f282d901b9aeb323d00f2a5dfe2d13588 M clutter I don't pretend to actually understand what that means or how to interpret a possible fix for budgie animations - but at least its something to focus on. ** Bug watch added: GNOME Bug Tracker #782344 https://gitlab.gnome.org/782344 -- 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/1811900 Title: SRU 3.28 latest git to bionic Status in gnome-shell package in Ubuntu: In Progress Status in mutter package in Ubuntu: In Progress Status in gnome-shell source package in Bionic: Fix Committed Status in mutter source package in Bionic: Fix Committed Bug description: [ Description ] 3.28 gnome git branch has various upstream approved fixes for many months now, but no release has been done yet, thus we're releasing a git snapshot of the latest approved fixes. [ QA ] Run Ubuntu session, expect the shell to work normally with various setups https://wiki.ubuntu.com/StableReleaseUpdates/GNOME [ Regresison potential ] Many patches we were including already have been included in upstream git now, various optimizations to clutter actors could cause drawing issues. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1811900/+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