Messages in this thread Patch in this message | | | Date | Tue, 31 May 2011 14:08:48 -0400 (EDT) | From | "Robert P. J. Day" <> | Subject | Re: [3.0-rc1] i915: blank screen on Lenovo Ideapad U160 |
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On Tue, 31 May 2011, Dirk Gouders wrote:
> Hello, > > I tested 3.0.0-rc1 on my notebook which has never been the best friend > of the i915 driver. With linux-2.6.38-gentoo-r4 it has the problem > that the screen remains blank after the lid is closed and reopened, but > that problem I can live with. With 3.0.0-r1 I am back to a former > problem that the screen goes (and remains) blank while booting. > > The next step I will do is to test linux-2.6.39-gentoo, probably I > did not notice information that I have to adjust boot parameters or the > kernel config?
based on my having lived through the i915 "black screen of death", pulling out my handy "git bisect" and with advice from chris wilson, these days, i simply apply this patch to the source:
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c index d2c7104..a1a5d03 100644 --- a/drivers/gpu/drm/i915/intel_opregion.c +++ b/drivers/gpu/drm/i915/intel_opregion.c @@ -152,6 +152,8 @@ static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) struct opregion_asle *asle = dev_priv->opregion.asle; u32 max;
+return ASLE_BACKLIGHT_FAILED; // rday + if (!(bclp & ASLE_BCLP_VALID)) return ASLE_BACKLIGHT_FAILED;
i tried taking it out a couple of times and immediately got the same i915-related problem so until i hear differently, the patch stays in.
rday
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======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ========================================================================
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