[Intel-gfx] Black screen when loading i915 on Mac mini Core Duo

[Jesse Barnes]

On Tue, 14 Jul 2009 10:42:28 +0200
Tino Keitel <tino.keitel+xorg at tikei.de> wrote:

> On Mon, Jul 13, 2009 at 21:12:30 +0200, Tino Keitel wrote:
> 
> [...]
> 
> > In the console, when I load the i915 module, the screen gets black.
> > This is the kernel output:
> > 
> > mtrr: no MTRR for 80000000,10000000 found
> > [drm] Initialized drm 1.1.0 20060810
> > i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> > i915 0000:00:02.0: setting latency timer to 64
> > i2c-adapter i2c-2: unable to read EDID block.
> > i915 0000:00:02.0: DVI-D-1: no EDID data
> > i2c-adapter i2c-2: unable to read EDID block.
> > i915 0000:00:02.0: DVI-D-1: no EDID data
> > [drm] TV-10: set mode NTSC 480i 0
> > [drm:drm_helper_initial_config] *ERROR* connectors have no modes,
> > using standard modes
> > [drm] fb0: inteldrmfb frame buffer device
> > [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
> > 
> > The computer has just a DVI-I output, an LCD with a resolution of
> > 1680x1050 is connected via DVI.
> > 
> > It looks like the EDID routines failed.
> 
> Any hints regarding this? I once saw a commit whith this subject:
> 
> drm/i915: sdvo: check GPIOA for SDVO DDC (vga DDC) when GPIOE fails
> 
> on this list posted by Keith Packard. However, it doesn't seem to be
> merged yet. This makes me think that my above issue is a known issue,
> which is not handled in the current KMS code yet.

Does his patch work for you?  We definitely have some known issues on
Macs; I'm not sure if Keith is planning on cleaning up that particular
patch some more or if it's ok to go in now...

-- 
Jesse Barnes, Intel Open Source Technology Center