Yesterday I updated my Tumbleweed machine after a few weeks of vacation.
Since then I get this error message every so often:
syslog-ng: Error opening file for writing; filename='/dev/tty1',
error='Permission denied (13)'

I checked the syslog-ng apparmor file, but it still contains

  /dev/tty1 rw,

ls -l /dev/tty1

crw--w---- 1 root tty     4,  1 Oct 15 12:43 /dev/tty1

I'm not sure, if and how the permissions for /dev/tty1 have been changed,
though. They seem to be identical on other machines, where syslog doesn't give
that error message.