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

[Mike Tallroth]

Problem solved. There was a USB stick plugged directly in to the
motherboard which I had forgotten about since changing this box over
from a freeNAS install. Once that was removed, the install completed
with no hangup.

I'll include the output from the point where it was hung. Both from ps,
and from the full os-prober output in syslog. At this point, I'm happy
to close the issue, but if you would like any further testing on this
setup, I'd be willing to support that. I'm not sure if you would expect
a USB drive to hang up the install or not.

The USB stick was the boot drive for freeNAS, so the primary partition
was formatted as ZFS.

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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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