RE: i see the intel i915 black screen issue is back

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On Fri, 28 Jan 2011, Tayade, Nilesh wrote:

>  It worked on my Ubuntu-Desktop. Ubuntu version: 10.04.
>  Please see the attached config file (I have not enabled/disabled any
>  config parameter - it is a default one).
>
>  >
>  > rday
>  >
>  > p.s.  i posted to the dri-devel list, let's see what i hear back.

  oh, we've been having an exciting time on the dri-devel list with
this.  if anyone wants to play along, the current workaround is to
take the git-bisected bad commit (b705120e), and deactivate a chunk of
functionality:

$ git diff
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregi
index 64fd644..27f677e 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) {


  at this point, the job is to narrow down where in that file the
problem is occurring.  it's clear that others are not seeing this so
i can only imagine it's some combination of my hardware and its
version or something.

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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