apparent workaround for i915 "black screen" issue

[Robert P. J. Day]

On Mon, 31 Jan 2011, selvamuthukumar v wrote:

> On Sat, Jan 29, 2011 at 4:13 PM, Robert P. J. Day <rpjday at crashcourse.ca> wrote:
> >
>
> > diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
> > index 64fd644..28adc6d 100644
> > --- a/drivers/gpu/drm/i915/intel_opregion.c
> > +++ b/drivers/gpu/drm/i915/intel_opregion.c
> > @@ -495,6 +495,8 @@ int intel_opregion_setup(struct drm_device *dev)
> >                opregion->acpi = base + OPREGION_ACPI_OFFSET;
> >        }
> >
> > +return 0; // rday
> > +
> >        if (mboxes & MBOX_SWSCI) {
> >                DRM_DEBUG_DRIVER("SWSCI supported\n");
> >                opregion->swsci = base + OPREGION_SWSCI_OFFSET;
> >
> >
>
> Yes. I was also facing similar issue. This workaround works for me.
> Tested using lenovo R61.

  so you're saying that you were persistently getting a black screen
boot, but that that simple tweak solved the problem?  i'm not scared
to admit that i still don't understand *how* that fixes things, i was
just following the guidance of the appropriate mailing list and, so
far, things have been working.  i'm sure there will be a formal fix in
the near future.

rday

-- 

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Robert P. J. Day                               Waterloo, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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