[Intel-gfx] Intel black screen

[valent.turkovic at gmail.com]

On Thu, Nov 10, 2011 at 10:43 PM, James M. Leddy
<james.leddy at canonical.com> wrote:
> On 11/10/2011 09:12 AM, Paulo J. Matos wrote:
>> Hi,
>>
>> I got a new PC DELL Vostro 360. This is an all-in-one which uses the
>> Optimus setup. An intel GT1 (Sandybridge) couples with an Nvidia 525m.
>> Ubuntu out of the box shows a black screen unless I add nomodeset to
>> kernel options.
>
> That sounds a lot like this bug:
>
> https://bugs.freedesktop.org/show_bug.cgi?id=42278
>
> It can be worked around by using vesafb instead of i915.

Maybe also this bug is related:
https://bugs.freedesktop.org/show_bug.cgi?id=38718

"I can confirm that with Acer Emachines E527, it's quite same behaviour on all
modern linux distributions (ubuntu, debian, gnome 3 livecd). Till 2.6.32 it
works out of the box, after it I need to manually run

setpci -s 00:02.0 F4.B=00

as root to enable backlight (completely black screen until gdm screen, very dim
before running setpci). "

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