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

[ykzhao]

On Fri, 2010-03-19 at 00:53 +0800, Scott Silverman wrote:
> 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.

Will you please boot the system with the option of "nomodeset" and cat
the output of /proc/acpi/button/lid/LID/state?

It will be great if you can add the boot option of "drm.debug=0x04" with
KMS enabled and attach the output of dmesg.

Thanks.
    Yakui
> 
> 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
> >
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