[Intel-gfx] Black screen on boot with KMS and unable to start X

[Scott Silverman]

My kernel .config can be found here: http://paste.pocoo.org/show/191168/

I have disabled uvesafb, and removed all modesetting/framebuffer
related entries from my grub config.
i.e.: kernel /vmlinuz26 root=/dev/disk/by-uuid/<snip> ro

When I boot, I see the boot process up until the point where I believe
the i915 module is loaded, at which point I get a black screen, though
the backlight is still on. The kernel continues to load properly, and
after this point I can access the machine via SSH, or blindly via the
console.

If at this point I attempt to start X, I will see the backlight flash
off, then back on. The log for Xorg can be found herE:
http://paste.pocoo.org/show/191171/

The configuration I am using for X is here: http://paste.pocoo.org/show/191172/

I can also try to start X without a config, the log for that attempt
is here (results the same, backlight flashes, then nothing):
http://paste.pocoo.org/show/191173/

Ideally, when I boot, I will see the console, and when I startx, I
will be able to see X.

Do you think I should file a bug?

Thanks,
Scott

On Thu, Mar 18, 2010 at 5:54 AM, Florian Mickler <florian at mickler.org> wrote:
> On Wed, 17 Mar 2010 15:55:04 -0500
> Scott Silverman <ssilverman at simplexinvestments.com> wrote:
>
>> I tried updating to the driver you specified (Actually, I went to 2.10.902).
>>
>> I still can't start X, I get:
>>
>> (EE) intel(0): No kernel modesetting driver detected.
>> (EE) Screen(s) found, but none have a usable configuration.
>>
>> I have checked dmesg, doesn't appear to be anything interesting there.
>>
>> In the interest of confirming that I have a proper configuration, I changed
>> " Driver "Intel" " to " Driver "vesa" " temporarily, X started up (thought
>> without decorations, I didn't really bother to look into that).
>>
>> I am currently using the uvesafb framebuffer driver, but as soon as the i915
>> module loads it enables modesetting and my display goes blank.
>>
>
> Hi!
>
> please post your kernel .config.
>
> short summary of the kernel side:
> 1. all kernel-graphics support is consolidated into i915 module.
> fbcon is used by i915 to display the console. kernel mode setting is
> needed for userspace x-driver.
>
> 2. all other kernel framebuffer-drivers are not to be used together with
> the i915 module.
>
> if you honor those two points, you should see the kernel booting up.
> if you don't see the kernel booting up, you should probably file a bug.
>
> hth,
> Flo
>