after upgrading to 11.04, getting intel "black screen of death" *again*

[Robert P. J. Day]

  last night, i did a 10.10 -> 11.04 release upgrade on my laptop, and
everything seemed to go fine except i started having sound issues as i
did with slightly earlier versions of hand-rolled kernels.  so for the
first time in a *looooong* time, i booted with the standard kernel
(vmlinuz-2.6.38-8-generic) just to have an allegedly working baseline
to compare against.

  sadly, it appears that the ubuntu-shipped kernel still has the intel
video "black screen of death" problem that's been there, like,
forEVAH!  and it's getting kind of tiring.

  to bypass this issue in all of the kernels i've built, i've added
the following patch to my kernel 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;


  as you can see, it just blows off a backlight check, and that's all
it's taken to avoid this issue for quite some time.  but because i
wanted to boot the stock ubuntu kernel, i can't control that and, sure
enough, boom -- totally black display.

  is anyone else running into this with 11.04 and that release of the
kernel?

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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