[Bug 1854839] Re: Fresh Bionic install hangs forever at 66% waiting for os-prober

[Dimitri John Ledkov]

also, you probably want to wipe your drive clean prior to install. This
will most likely help os-prober to not hang.

Also one can preseed that to do as an early action (like in pre-partman
command)

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to debian-installer in Ubuntu.
https://bugs.launchpad.net/bugs/1854839

Title:
  Fresh Bionic install hangs forever at 66% waiting for os-prober

Status in debian-installer package in Ubuntu:
  Confirmed

Bug description:
  Installing Ubuntu 18.04 cleanly on boxes that have 14.04, the
  installer hangs at the end during "update grub" at 66%, forever, until
  I switch to another console and kill the pid of "dmsetup".  Issue is
  described in more detail here:
  https://jrs-s.net/2019/05/31/ubuntu-18-04-hung-at-update-grub-66/  .
  I am doing a netboot preseed install using the 4.15.0-62 kernel and
  initrd from October 2019.  When provisioning ~15 boxes at a time, 90%
  - 100% of them are afflicted by this.  If I power cycle them and PXE
  them into the installer again when hung they usually run to
  completion.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1854839/+subscriptions