[Bug 60568] New: Intel HD 4000 i915 black screen starting gdm

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60568

          Priority: medium
            Bug ID: 60568
          Assignee: chris at chris-wilson.co.uk
           Summary: Intel HD 4000 i915 black screen starting gdm
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ek at itomat.se
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

Created attachment 74521
  --> https://bugs.freedesktop.org/attachment.cgi?id=74521&action=edit
Starting gdm3 getting to black screen with cursor

Quick description:
I recently started trying to get my Debian(squeeze) installation running on a
new Ivy Bridge machine. I disabled the nvidia optimus gfx card in the bios, so
the only active gfx card is the intel one. 

Using latest stable kernel, xf86-video-intel, libdrm gives, when starting gdm3
however, the screen blanks, and theres only a white cursor at the top left,
leaving it for quite some while makes no difference.

-----
Detailed:
This is what I've done so far getting to this point.

To start with, I compiled a new kernel, 3.7.6 and make sure to enable:
CONFIG_DRM_I915=m
CONFIG_DRM_I915_KMS=y

after reboot lsmod | grep i915 gives:
i915                  377949  2 
drm_kms_helper         17932  1 i915
intel_agp               7845  1 i915
intel_gtt              11114  2 i915,intel_agp
button                  3371  1 i915
video                   9277  1 i915

$ uname -a
Linux box 3.7.6-intel #1 SMP Sat Feb 9 09:08:15 CET 2013 i686 GNU/Linux
$ uname -r
3.7.6-intel

Libdrm - 2.4.40
Compiled with ./configure --prefix=/usr; make; sudo make install

xf86-video-intel - 2.20.12
Compiled with ./configure --prefix=/usr; make; make check; sudo make install

I avoided the 3d drivers for now trying to keep it simple. :)

Starting gdm3 after this point gives the log in Xorg.log_intel_drv.

I also tried booting the kernel with i915.semaphores=1 and i915.nomodeset=1
since I read that might be useful, but it doesnt make any difference in this
case.

If I make uninstall the xf86-video-intel I can start gdm3 but I assume it then
uses fbdev/vesa for the screen.

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