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
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