Not sure the downgrade touches this file.
After sudo apt install apparmor=4.0.0-beta3-0ubuntu3
libapparmor1=4.0.0-beta3-0ubuntu3 and reboot:
(flatpak not working)
$ apt policy apparmor
apparmor:
Installed: 4.0.0-beta3-0ubuntu3
Candidate: 4.0.1-0ubuntu0.24.04.2
Version table:
4.0.1-0ubuntu0.24.04.2 500
500 http://se.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
*** 4.0.0-beta3-0ubuntu3 500
500 http://se.archive.ubuntu.com/ubuntu noble/main amd64 Packages
100 /var/lib/dpkg/status
shasum /etc/apparmor.d/bwrap-userns-restrict
a9bc3009905641ccaf5dfbe2c7a99b2410d05022 /etc/apparmor.d/bwrap-userns-restrict
$ sudo apt install apparmor libapparmor1
...
$ shasum /etc/apparmor.d/bwrap-userns-restrict
a9bc3009905641ccaf5dfbe2c7a99b2410d05022 /etc/apparmor.d/bwrap-userns-restrict
$ apt policy apparmor
apparmor:
Installed: 4.0.1-0ubuntu0.24.04.2
Candidate: 4.0.1-0ubuntu0.24.04.2
Version table:
*** 4.0.1-0ubuntu0.24.04.2 500
500 http://se.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
100 /var/lib/dpkg/status
4.0.0-beta3-0ubuntu3 500
500 http://se.archive.ubuntu.com/ubuntu noble/main amd64 Packages
$ apt-file search /etc/apparmor.d/bwrap-userns-restrict
apparmor: /etc/apparmor.d/bwrap-userns-restrict
Entry in /var/log/apt/history.log that seems to have broken flatpak:
Start-Date: 2024-07-13 20:57:49
Commandline: aptdaemon role='role-commit-packages' sender=':1.122'
Upgrade: apparmor:amd64 (4.0.0-beta3-0ubuntu3, 4.0.1-0ubuntu0.24.04.2),
libapparmor1:amd64 (4.0.0-beta3-0ubuntu3, 4.0.1-0ubuntu0.24.04.2)
End-Date: 2024-07-13 20:57:53
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https://bugs.launchpad.net/bugs/2072811
Title:
Apparmor: New update broke flatpak with `apparmor="DENIED"`
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