GNOME Shell crashes when recording a session with fractional scaling and using a custom cursor

[Marco Trevisan (Treviño)]

[ Impact ]

When recording a session or sharing it, and a custom cursor is used, then GNOME Shell crashes as soon as the cursor is painted

Upstream fix: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3978

[ Test case ]

- Enable fractional scaling to something that is not an integer scaling (e.g. 150%, 175%...)
- Start recording or sharing your session
  - E.g. Can use https://screenrecorderonline.net/
- Open this page (firefox) https://gitlab.gnome.org/Teams/Design/settings-mockups/-/commit/ff3c8fbbc1d14
  Hover on an image
- Open GIMP and use the color picker in your screen
- The custom cursor should show properly and gnome shell should record it without crashing

[ Regression potential ]

The cursor is not show or it has the wrong scaling

[Marco Trevisan (Treviño) (3v1n0)]

The bug has been fixed already in GNOME 47 as part of the commit https://gitlab.gnome.org/GNOME/mutter/-/commit/422ee4515d6ee69705654f8db0dced57673f894f

[Daniel van Vugt (vanvugt)]

If https://gitlab.gnome.org/GNOME/mutter/-/issues/2542 is the upstream issue then the fix went into Mutter 44.0. Noble should be "Fix Released" already.

[Daniel van Vugt (vanvugt)]

That same fix is in 42.8 already, meaning Jammy is already fixed too.

If you think it's still not fixed then I can only assume that https://gitlab.gnome.org/GNOME/mutter/-/issues/2542 is NOT the upstream issue(?)

[Daniel van Vugt (vanvugt)]

Oh OK, it needs two separate fixes. So https://gitlab.gnome.org/GNOME/mutter/-/issues/2542 should not be listed as the upstream issue.

[Robie Basak (racb)]

I'm rejecting two uploads for Noble because they collide between bug 2077746 and bug 2025006 (amongst others). Please coordinate and re-upload just one SRU at once (possibly squashing multiple fixes together as you wish).

[Daniel van Vugt (vanvugt)]

https://launchpadlibrarian.net/746352003/mutter_46.2-1ubuntu0.24.04.2_source.changes