Simon,
Thank you for a reply. I understand. On the machine in question, libmutter-10-0
in version 42.3-2 is installed. The package libmutter-7-0 is not installed, and
no other libmutters are known to aptitude. At the moment, I cannot risk a full
upgrade from Debian stable to Debian testing (it's a production machine), but I
can certainly try to upgrade a package or two. To get rid of the particular
error message, the solution would be to upgrade xwayland, wouldn't it? Any
hint on which version would do, at least roughly?
Gratefully,
Alma
