Public bug reported:

Hi

Upgrading to a newer distribution version mostly works very well, but
the monitor switches off after some time with no user input. This is
normally quite useful on notebooks to save some battery power, but a big
problem during upgrade when the monitor doesn't turn on again.

If you think that the system crashed due to an ACPI bug and reset, the
Ubuntu installation gets corrupted and with no luck in recovery you have
to reinstall the entire system. :(

See also: http://brainstorm.ubuntu.com/idea/28146/


Best Regards,
Atalanttore

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Description changed:

  Hi
  
  Upgrading to a newer distribution version mostly works very well, but
  the monitor switches off after some time with no user input. This is
  normally quite useful on notebooks to save some battery power, but a big
  problem during upgrade when the monitor doesn't turn on again.
  
  If you think that the system crashed due to an ACPI bug and reset, the
  Ubuntu installation gets corrupted and with no luck in recovery you have
  to reinstall the entire system. :(
  
+ See also: http://brainstorm.ubuntu.com/idea/28146/
+ 
  
  Best Regards,
  Atalanttore

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https://bugs.launchpad.net/bugs/811029

Title:
  Disable monitor suspend while upgrading to a newer distribution
  version

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