Comment 10 for bug 816632

On 13/10/2011 23:23, Simon Déziel wrote:
> I'm not 100% sure if it's related to this bug but since I upgraded to
> unity 3.8.16-0ubuntu1~natty3 I have trouble with my external LCD screen.
>
> I can get to the login prompt but once authenticated, the screen goes
> black. When this occurs, I still can have my display back if I unplug my
> external monitor, my laptop's screen goes on and all work fine on this
> screen (except that some applets failed to load the first time).
>
> Note that I normally only use my external monitor as my primary and my
> laptop's screen is turned off by default. This seems to trigger the bug.
> I was able to find workaround to have my external LCD working :
>
> # Set my external LCD as primary
> $ xrandr --output VGA1 --primary
>
> # Turn off laptop's screen
> $ xrandr --output LVDS1 --off
>

It's probably not this bug. The fix for this bug is a one-liner that has no
visual impact at all. You should try downgrading to 3.8.16-0ubuntu1~natty2 and
seeing if the issue still persists. natty3 fixes bug #761409 as well, but I
don't think your issue is related to that either.

--
Kind regards,
Loong Jin