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[Viswa B <vsbhattachar@xxxxxxxxxxx>]

Public bug reported:

I have installed Ubuntu 14.04 on a Acer Aspire One 722. Everything works
fine on the laptop by itself. But if I connect the laptop to an external
monitor (a HDTV in this instance) via a HDMI cable, the display on the
laptop screen and on the external monitor work fine:

1)  until I close the screen of the laptop while the laptp is still on,
let it go to sleep, and then open the screen and restart. At that point
the laptop and external montor screens are black with some garbled
characters. There is no way to recover the laptop but shut it down and
perform a cold boot.

2) and continue to do so if I use the suspend command (from the drop
down menu from the top right corner of the screen). The laptop and the
external monitor go dark when the computer suspends. Upon waking both
the laptop screen and the external monitor work fine. Needless to say
closing the lid after using the suspend command makes no difference.

Any clues on what could be happening when I close the lid of the laptop
to suspend the laptop?

Ubuntu information: 64 bit version
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"

viswa@netbook:~$ uname -r
3.11.0-18-generic

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1414230

Title:
  v14.04 screen garbled upon restart with external monitor

Status in unity package in Ubuntu:
  New

Bug description:
  I have installed Ubuntu 14.04 on a Acer Aspire One 722. Everything
  works fine on the laptop by itself. But if I connect the laptop to an
  external monitor (a HDTV in this instance) via a HDMI cable, the
  display on the laptop screen and on the external monitor work fine:

  1)  until I close the screen of the laptop while the laptp is still
  on, let it go to sleep, and then open the screen and restart. At that
  point the laptop and external montor screens are black with some
  garbled characters. There is no way to recover the laptop but shut it
  down and perform a cold boot.

  2) and continue to do so if I use the suspend command (from the drop
  down menu from the top right corner of the screen). The laptop and the
  external monitor go dark when the computer suspends. Upon waking both
  the laptop screen and the external monitor work fine. Needless to say
  closing the lid after using the suspend command makes no difference.

  Any clues on what could be happening when I close the lid of the
  laptop to suspend the laptop?

  Ubuntu information: 64 bit version
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=14.04
  DISTRIB_CODENAME=trusty
  DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"

  viswa@netbook:~$ uname -r
  3.11.0-18-generic

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