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

[Erick Brunzell]

I need to amend my last comment. I just performed another installation
on the same hardware starting from the live DE and I once again ended up
with just a black screen after selecting Restart - this time with Ubuntu
Mate amd64 but I doubt it's flavor specific ............ maybe it's just
more likely to occur if the installation is started from the boot
menu????

After clicking on restart the disk ejects but no message is displayed
and after removing the disk (and closing tray) no key combo works to
complete the reboot.

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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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