linux-kernel - Re: has the i915 "black screen" boot issue returned? [BISECTED]

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Date:	Fri, 28 Jan 2011 15:46:08 -0500 (EST)
From:	"Robert P. J. Day" <rpjday@...shcourse.ca>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Chris Wilson <chris@...is-wilson.co.uk>,
	dri-devel@...ts.freedesktop.org, Len Brown <len.brown@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: has the i915 "black screen" boot issue returned? [BISECTED]

On Fri, 28 Jan 2011, Rafael J. Wysocki wrote:

> Alternatively, you could take the vanilla Linus' tree and replace
> ioremap_cache() with ioremap() in include/linux/acpi_io.h .  Please
> try that and see if it makes a difference.

  as a quick followup, i applied the following simple patch:

$ git diff
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;


to the latest tree, and it gave me a booting kernel, no black screen
issue.  i will not pretend to understand why that fixes the problem
but it does.

rday

-- 

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

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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