[Bug 1445592] Re: vivid fails to shutdown or reboot at end of installation when "reboot now" button is pressed

[Erick Brunzell]

Brendan has Step #2 exactly correct:

"Select "Install" (not "Try before installing")"

I've tested both the Ubuntu GNOME and Ubuntu 20150417.1 amd64 images on
bare metal and if the installation is started from the live DE all works
as expected, but if you you choose Install while the image is booting
restart fails once the install is complete.

The prompt to restart is displayed but after clicking on restart the
disc ejects as it should, then the screen goes black and no key
combination will complete the restart procedure.

So it's sort of a combination of bug #966480 and bug #1436715 with the
exception that all works well as long as the installation is started
from the live DE, but if install is chosen while booting the images the
post-install reboot process is borked.

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https://bugs.launchpad.net/bugs/1445592

Title:
  vivid fails to shutdown or reboot at end of installation when "reboot
  now" button is pressed

Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  STEPS TO REPRODUCE
   1. Boot Vivid
   2. Select "Install" (not "Try before installing")
   3. Go through the installation process
   4. Upon successful installation, select "Reboot Now"

  EXPECTED RESULTS
   * system reboots

  ACTUAL RESULTS
   * system does not reboot or shutdown
   * cannot get to tty

  AFFECTS
   * images: 20160417+, all flavors
   * ubiquity 2.21.22

  NOTES
   * this was mentioned earlier in the cycle but on older bugs, so this is a regression of some kind
   * cyphermox claims this does NOT happen in the live session

  WORKAROUND
   * hard reboot

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