Apologies for the delayed follow-up to this. No, booting from any other medium works fine. I also got further in figuring out under what circumstances this happens, and it appears to be EFI-related.
So if I bring up the boot media menu on boot, and manually choose the Ubuntu EFI partition (the only one), the system actually boots fine. But if I don't do this, and let it go to default, the problem consistently happens. I am not using Secure Boot (it's not supported by the system), and as mentioned I'm running the last BIOS available for this model. Tinkering with booting in legacy/BIOS mode has not been successful, and manually choosing Ubuntu EFI from the boot menu is currently the only way I've found to get the system to successfully boot. I have tried everything I can think of to rectify this, including completely reinstalling GRUB according to Boot-Repair's recommendations, but to no avail. Here's the output of Boot-Repair, which also did not fix the problem: https://paste.ubuntu.com/p/jVvMSWwGxn/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926972 Title: Xubuntu with LUKS FDE hangs upon boot after Hirsute upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1926972/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
