System won't boot after failed upgrade from 23.10 to 24.04

[Walt Mankowski]

I just realized I had a typo in the message subject. Obviously I meant
24.04, not 24.05.

Walt

On Sat, May 25, 2024 at 04:45:58PM -0400, Walt Mankowski wrote:
> Hi.
> 
> I tried to upgrade from 23.10 to 24.04 today and it failed. It ran out
> of disk space on /usr midway through the install, leaving things in a
> weird state. I was able to run `apt upgrade` and install a bunch of
> them, but several 100 more were still in a state where they were being
> held. I tried doing another `apt do-release-upgrade`, but by that
> point it thought it was already on 24.04 and so it returned
> immediately.
> 
> At this point I tried rebooting to see if that would clear things up,
> That was a mistake. Not it's not booting up. If gets pretty far into
> the boot process then fails. The messages scroll off the screen and I
> can't see all of them.. The last one says
> 
> Failed to start svscan.service - Daemontools service scanner.
> See 'systemctl status svscan.service' for details.
> 
> Above that I see that dbus.service failed to start. And above that I
> see a bunch of failed dependencies for half a dozen SSSD responder
> sockets. I'm not able to scroll up beyond that.
> 
> I do nightly backups so with any luck I haven't lost any data. Is
> there any way I can get back in there in single user mode and have it
> finish the upgrade to 24.04?
> 
> Walt
> 
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