[Bug 1760598] Re: I/O Error after clicking "reboot now" - Ubuntu font missing from casper shutdown

[Dimitri John Ledkov]

Keeping ubiquity task open; until after we respin, and test that this
issue is gone. It is cosmetic, and the only side effect that one does
not see the final message "please remove installation media and hit
enter". I'm hoping the first daily after beta will be fixed.

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https://bugs.launchpad.net/bugs/1760598

Title:
  I/O Error after clicking "reboot now" - Ubuntu font missing from
  casper shutdown

Status in ubuntu-mate:
  Invalid
Status in casper package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Invalid
Status in ubiquity package in Ubuntu:
  Confirmed
Status in ubuntu-mate-welcome package in Ubuntu:
  Invalid

Bug description:
  ubuntu Plymouth theme now correctly uses Ubuntu font, meaning it needs
  to be cached for display of the shutdown message.

  We really should be using shutdown initramfs on the livecd....

  --

  Tested in Virtualbox VM.
  Ubuntu MATE works after force-reboot, but after I click on "restart now" after completing the installation, the screen shows me this:

  req_error: I/O error, dev sr0, sector 1488792

  And the above message loops a couple times, and wont turn off the
  computer to restart.

  No error happens after force reboot, and the OS boots properly, but
  I'm curious as to what's causing this.

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