[Bug 1779757] Re: Ubuntu 18.04 installer failure related time synchronization issues on a DELL server

[Paul White]

** Package changed: ubuntu => subiquity (Ubuntu)

** Tags added: bionic focal hirsute

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Title:
  Ubuntu 18.04 installer failure related time synchronization issues on
  a DELL server

Status in subiquity package in Ubuntu:
  Confirmed

Bug description:
  Tried to install Ubuntu server on an older Dell server, but it failed.
  I received the exact same errors that was posted in another thread
  (and I don't have a way to copy the failure log) so I am copying the
  details from https://answers.launchpad.net/ubuntu/+question/669976.

  As in the other thread, there seemed to be a time synchronization
  issue:

  "E: Release file for http://.../InRelease is not valid yet (invalid
  for another 1h 59min 50s)."

  However, I checked the BIOS system time - it was correct. This seems
  like an installer bug in 18.04 LTS. I just installed 16.04.4 without
  issue, and will upgrade from there.

  If I had to guess where this error is coming from, I would guess that
  it is related to the fact that this DELL machine encodes system time
  as packed BCE and the 18.04 LTS  Ubuntu installer is decoding it as
  something else? But that is just my guess

  
  - - - - - - - - 
  here are additional error details (copied from +question/669976.) 

  - got a python traceback from curthooks.py, which seems to be called by unshare.
  - highlights:

  Unexpected error while running command: unshare --fork --pid -- chroot
  /target apt-get --quiet --option=Acquire::Languages=none
  --option=Dir::Etc::sourcelist=/tmp/tmpk_vnogkp/sources.list
  --option=Dir::Etc::sourceparts=/tmp/tmpk_vnogkp/sources.list.d update

  Exit code: 100

  finish: cmd-install: FAIL: curtin command install

  Traceback:
    File "/usr/lib/python3/dist-packages/curtin/commands/curthooks.py", line 191, in install_kernel
      map_suffix = mapping[codename][version]
  KeyError: 'bionic'

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