[Bug 1769044] [NEW] Ubunut 18.04 d-i preseeded installer hangs at 66 % of update-grub...

[Lenin]

Public bug reported:

Checking alt-f4, I can see stuff about os-prober, going alt-f2, ps |
grep mounted; then killing the first process, it goes further and all is
fine.

Annoying thing, out of 15 machines it happened on 7 (about 50%), why, I
can't tell yet.

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "IMG_2687.jpg"
   https://bugs.launchpad.net/bugs/1769044/+attachment/5133426/+files/IMG_2687.jpg

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https://bugs.launchpad.net/bugs/1769044

Title:
  Ubunut 18.04 d-i preseeded installer hangs at 66 % of update-grub...

Status in debian-installer package in Ubuntu:
  New

Bug description:
  Checking alt-f4, I can see stuff about os-prober, going alt-f2, ps |
  grep mounted; then killing the first process, it goes further and all
  is fine.

  Annoying thing, out of 15 machines it happened on 7 (about 50%), why,
  I can't tell yet.

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