Daniel van Vugt bafea13e95 kms/impl-device: Handle empty updates properly
This fixes freezes on cursor movement when:

1. meta_onscreen_native_finish_frame would create an empty update.
2. maybe_update_cursor_plane would leave it empty (!cursor_invalidated).
3. do_process would fail to recognise a non-null empty update as an error.
4. meta_kms_impl_device_handle_update would fail to send feedback on errors
   from do_process, because do_process is meant to do it.
5. Page flip listeners would wait forever for feedback that never comes.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2923,
       https://gitlab.gnome.org/GNOME/mutter/-/issues/2924,
       https://gitlab.gnome.org/GNOME/mutter/-/issues/2926,
       https://gitlab.gnome.org/GNOME/mutter/-/issues/2933

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3138>
2023-08-07 16:51:43 +08:00
..
2023-07-25 21:24:35 +00:00
2023-07-30 16:29:33 +00:00