No signal on external monitor with 3.5 Kernel
On 08/10/12 14:06, jsteel wrote:
> On 10 August 2012 01:55, Sudaraka Wijesinghe
> <firstname.lastname@example.org> wrote:
>> Hi Everyone,
>> I have an external monitor connected to my laptop via HDMI which I use
>> side by side to get an extended desktop.
>> When I boot the system with 3.5 Kernel I don't get any signal on the
>> external monitor, laptop display and everything else work fine.
>> It works fine with 3.4.x Kernels, and I believe it's not a X problem as
>> it's not getting any signal even before X starts (It does with 3.4.x).
>> I was wondering if anyone else has this issue and possibly a solution,
>> or is this something I need to submit upstream?
>> Sudaraka Wijesinghe
> What's the output of xrandr? Try something like xrandr --output LVDS1
> --auto --output VGA1 --auto --right-of LVDS1
xrandr output http://pastebin.com/z9G4n1Sp
This is what I use to initialize the two monitors when X starts
xrandr --output LVDS1 --auto --primary --output HDMI1 --auto
And it has no effect as the monitor connected to receives no signal (it
goes to sleep)
Also, as I mentioned before I don't see the output during the boot
either so I assume this is not an X thing.
Maybe 3.5 has some modules turned off by default? or this is a bug. I
couldn't diagnose it properly.