Yes, it only started occurring within the last few weeks/month. I can confirm that booting the previous (but still installed) kernel, fixes the problem.
$ uname -a Linux metabox 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux That kernel works for me, so the issue must be in the "139" version. I did not try the latest upstream kernel because I have NVIDIA drivers and Virtualbox installed and I'd rather not go through the hassle of uninstalling all custom modules, if I can avoid it. Do you still need me to try the latest upstream? ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1803929 Title: Summary: Kernel bug (unhandled paging request) on "udisksctl power- off" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803929/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs