The issue has reproduced since I left the office last night. The kernel and journal log are attached.
It means the issue can be reproduced with the noble AppArmor. $ apt list --installed | grep apparmor apparmor/now 4.0.1really4.0.1-0ubuntu0.24.04.5 amd64 [installed,upgradable to: 5.0.0~alpha1-0ubuntu9] libapparmor1/now 4.0.1really4.0.1-0ubuntu0.24.04.5 amd64 [installed,upgradable to: 5.0.0~alpha1-0ubuntu9] Therefore, I think the issue is not related to AppArmor or snapd. As JJ's comment. It may be related to the kernel. But the noble's 6.14.0-37-generic isn't bootable with resolute rootfs. I will try the noble for running 6.18.0-9-generic. Tks. ** Attachment added: "2026-0204-1800.zip" https://bugs.launchpad.net/apparmor/+bug/2139664/+attachment/5942860/+files/2026-0204-1800.zip -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2139664 Title: snap service cannot change apparmor hat To manage notifications about this bug go to: https://bugs.launchpad.net/apparmor/+bug/2139664/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
