Messages in this thread | | | Date | Sat, 06 Jun 2009 09:14:41 +0300 | From | Pekka Enberg <> | Subject | Re: Intel 915GM MCHBAR bug |
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Woody Suwalski wrote: > Andrew Morton wrote: >> On Fri, 05 Jun 2009 11:02:21 +0300 >> Pekka Enberg <penberg@cs.helsinki.fi> wrote: >> >> >>> Hi Jesse, >>> >>> (I am cc'ing linux-kernel.) >>> >>> On Mon, 01 Jun 2009 22:31:13 +0300 >>> >>>> Pekka Enberg <penberg@cs.helsinki.fi> wrote: >>>> >>>> >>>>> Hi Jesse, >>>>> >>>>> I am seeing this on my Eee PC 701 which is running a Ubuntu >>>>> 2.6.28-11.42-generic stock kernel: >>>>> >>>>> [ 76.826966] [drm:i915_gem_detect_bit_6_swizzle] *ERROR* Couldn't >>>>> read from MCHBAR. Disabling tiling. >>>>> [ 76.827215] [drm] Initialized i915 1.6.0 20080730 on minor 0 >>>>> [ 76.834037] [drm:i915_setparam] *ERROR* unknown parameter 4 >>>>> [ 76.834104] [drm:i915_getparam] *ERROR* Unknown parameter 6 >>>>> >>>>> Google turned up this patch >>>>> >>>>> http://lists.freedesktop.org/archives/intel-gfx/2009-January/001186.html >>>>> >>>>> >>>>> but I don't seem to find it mainline kernel. >>>>> >>>>> Was the bug fixed in some other way? It seem that distributions have >>>>> not yet picked up your patch and I am unsure if it's in any of the >>>>> -stable kernels. >>>>> >>> On Thu, 2009-06-04 at 11:27 +0100, Jesse Barnes wrote: >>> >>>> I think Eric acked it but may not have pushed it to drm-intel-next >>>> yet. Should happen in the next week or two though as we prepare the >>>> merge window series. >>>> >>> OK, thanks for the info! FYI, I tested 2.6.30-rc8 with your patch >>> applied and everything works smoothly on my EeePC 701. I did not test >>> plain 2.6.30-rc8 as I expect it to show same kind of behavior as Ubuntu >>> distro kernel. Is this correct or do you want me to test 2.6.30-rc8 too? >>> >>> I wonder why the patch hasn't received more attention as it's a pretty >>> critical bug. The _default_ Ubuntu 9.04 netbook remix installation is >>> completely broken for EeePC 701 (and probably others as well) without >>> the patch. And it's not as if I'm the only one that suffers from it. A >>> quick Google search reveals that a lot of people are hitting it. >>> >>> So I really do think we need to merge this patch to the upcoming 2.6.31 >>> ASAP and backport it to -stable after it has gotten some more testing. >> >> Wanna show us the patch? >> >> Because the world could certainly do with more i915 bugfixes :( > > Here is Jesse's patch from > http://lists.freedesktop.org/archives/intel-gfx/2009-January/001186.html > adopted for 2.6.30-rc8... (needed to redo hunk #3 for i915_gem_tile.c)
Yup. I took the two patches from here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/349314
and did the same rediffing on top of 2.6.30-rc8 for the first one.
Andrew, do you want me to forward you the (tested) patches or should we wait for Jesse et al to take care of it?
Pekka
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