Public bug reported:
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.
** Affects: debian-installer (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1854839
Title:
Fresh Bionic install hangs forever at 66% waiting for os-prober
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