[Intel-gfx] gen6 (SNB) garbled window content when scrolling with SNA enabled

[Dave Airlie]

On Wed, Aug 3, 2011 at 4:59 PM, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> On Wed, 3 Aug 2011 08:06:05 +0100
> Dave Airlie <airlied at gmail.com> wrote:
>
>> > Also, is it a bug that xrandr does not report eDP and DVI ports? (the first
>> > one is located on the NTB itself and dock, DVI is located on the dock only.)
>> > xrandr reports only VGA1 and LVDS1 ports. I have optimus variant but
>> > I switched to Intel only in BIOS.
>>
>> Its most likely they aren't wired to the Intel chip at all, just the nvidia.
>
> Yeah that's pretty common.  On my Vaio, I can get DDC bits from the
> HDMI port with the Intel display controller, but can't actually light
> it up.  I guess it's cheaper to do that than to wire up a full MUX for
> the port.

Yeah the combined nvidia/intel driver detects the DDC and switches to
the nvidia driver.

Dave.