Unfortunately the test infrastructure still uses Ubuntu 18.04 (or even 16.04) which in the Wayland world is quite old and has many known bugs. I opened https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1570 which will be needed for the vsyncsource. Alternatively we could force-off the pref for testing - but that would be somewhat hacky.
Bug 1629140 Comment 11 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
Unfortunately the test infrastructure still uses Ubuntu 18.04 (or even 16.04) which in the Wayland world is quite old and has many known bugs. I opened https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1570 / https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1905330 which will be needed for the vsyncsource. Alternatively we could force-off the pref for testing - but that would be somewhat hacky.