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SubjectRe: has the i915 "black screen" boot issue returned? [BISECTED]
On Fri, 28 Jan 2011, Chris Wilson wrote:

> On Fri, 28 Jan 2011 09:51:01 -0500 (EST), "Robert P. J. Day" <rpjday@crashcourse.ca> wrote:
> > sadly, no change -- still black screen. again, rebooted
> > successfully under commit 8a327f23. just to be clear, here's "git
> > diff":
> >
> > $ git diff
> > diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h
> > index 7180013..e035f3c 100644
> > --- a/include/linux/acpi_io.h
> > +++ b/include/linux/acpi_io.h
> > @@ -7,7 +7,7 @@
> > static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
> > acpi_size size)
> > {
> > - return ioremap_cache(phys, size);
> > + return ioremap(phys, size);
> > }
>
> Ok, that implies the new mapping is fine and not the cause of the issue.
>
> Instead you have some OpRegion related regression hidden until till now
> because the conflicting mapping disabled it for i915.
>
> That would be easy to test by returning early in intel_opregion_setup():
>
> diff --git a/drivers/gpu/drm/i915/intel_opregion.c
> b/drivers/gpu/drm/i915/intel_
> index 9efccb9..8c93201 100644
> --- a/drivers/gpu/drm/i915/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/intel_opregion.c
> @@ -470,6 +470,8 @@ int intel_opregion_setup(struct drm_device *dev)
> u32 asls, mboxes;
> int err = 0;
>
> + return -ENOTSUPP;
> +
>
> pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
> DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
> if (asls == 0) {
>

so you want me to revert to a stock b705120e before doing the above?

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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