[Bug 1770173] Re: 18.04 install stuck on grub install

[Mike Tallroth]

-- I'm still not seeing the output of os-prober with the set -x option
working.

I updated /target/usr/bin/os-prober with the -x option added. I was
expecting it to show up in the syslog. Apparently still having trouble
following the twisty maze of passages all alike. I will try again.

-- Also you were able to manually run it with this zfs usb stick plugged
in and it did not hang right?

That it correct, if all the calls in os-prober are synchronous, then it
did not hang. It returned to the command line with no error output. I
did not check ps at the same time I ran os-prober manually however, so I
don't know what might have still been running. I assumed everything was
synchronous, so I didn't bother.

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https://bugs.launchpad.net/bugs/1770173

Title:
  18.04 install stuck on grub install

Status in os-prober package in Ubuntu:
  Incomplete

Bug description:
  Installation freezes on grub install at 66%. syslog shows grub-install
  ran successfully, then seems to have actually gotten stuck in the next
  step (osprober). Photo attached, sorry for the terrible quality from
  HTC.

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