Ubuntu
mutter package

  1. Bug #1751593
  2. Comment #11

Comment 11 for bug 1751593

Revision history for this message
In , Ofourdan (ofourdan) wrote :

Created attachment 341942
[PATCH] MetaWindowActor: Update shape in pre-paint

When dealing with clients who support the _NET_WM_SYNC protocol, the
shape update is done from meta_compositor_sync_updates_frozen(), but tha
can leave (on Xwayland primarily) visual traces of the previous hsape as
being cleared by a resize, causing ugly black border flickers.

Avoid the issue by updating the shape in pre_paint() as with other
clients which do not support _NET_WM_SYNC.
--
Note: that (simple) patch seems to avoid the issue, without needing additional synchronization mechanism.