master 0c240e4: Document a bug that exists with some versions of GNOME and GTK

[Po Lu]

branch: master
commit 0c240e42353976b9e6ee90d345abf31359ca5e8d
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Document a bug that exists with some versions of GNOME and GTK
    
    * etc/PROBLEMS (Window-manager and toolkit-related problems):
    Document GNOME shell bug.
---
 etc/PROBLEMS | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/etc/PROBLEMS b/etc/PROBLEMS
index acff3be..e70f61b 100644
--- a/etc/PROBLEMS
+++ b/etc/PROBLEMS
@@ -1328,6 +1328,12 @@ A better approach might be to avoid navigation from 
Nautilus to Emacs
 for such files, and instead to open the file in Emacs using Tramp
 remote file name syntax.
 
+*** Gnome: GTK builds with XInput2 freeze when making a frame fullscreen.
+
+This problem exists with GTK 3.24.30 in GNOME 41.1 and possibly other
+versions.  The solution is to upgrade GNOME Shell to the version that
+comes with GNOME 41.2.
+
 *** KDE: When running on KDE, colors or fonts are not as specified for Emacs,
 or messed up.