Additional clarification after further testing:
The issue is still reproducible here with apparmor
4.0.1really4.0.1-0ubuntu0.24.04.6 installed.
I repeated the test in an isolated setup (separate test directory and
XDG_CACHE_HOME),
so this is not influenced by any previous cache state.
The behavior remains unchanged:
thumbnail generation still fails immediately and the log continues to show:
bwrap: loopback: Failed RTM_NEWADDR: Operation not permitted
This suggests that the recent changes (removal of the Nautilus AppArmor profile)
are not sufficient to resolve the issue in this environment.
System state:
All packages are up to date.
$ apt policy apparmor
apparmor:
Installed: 4.0.1really4.0.1-0ubuntu0.24.04.6
Candidate: 4.0.1really4.0.1-0ubuntu0.24.04.6
Version table:
*** 4.0.1really4.0.1-0ubuntu0.24.04.6 500
500 http://de.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
100 http://de.archive.ubuntu.com/ubuntu noble-proposed/main amd64
Packages
100 /var/lib/dpkg/status
4.0.0-beta3-0ubuntu3 500
500 http://de.archive.ubuntu.com/ubuntu noble/main amd64 Packages
The AppArmor service was restarted:
$ sudo systemctl restart apparmor
Also, no Nautilus AppArmor profile is present anymore:
$ sudo aa-status | grep -i nautilus
(no results)
From a user perspective, it currently looks like the underlying restriction
affecting
the bwrap-based thumbnailing is still active.
As already noted, further debugging on the user side is limited, since Nautilus
enters
the fail-state immediately and only the failure condition can be observed in
logs.
For reference, the related Nautilus report with detailed logs and behavior:
https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/2148075
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https://bugs.launchpad.net/bugs/2142792
Title:
The busybox and nautilus profiles in 24.04 should be removed
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