linux-kernel - Re: BUG: unable to handle kernel NULL pointer dereference at 0000000000000004

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Date:	Wed, 21 Oct 2009 13:11:35 +0200
From:	Jerome Glisse <glisse@...edesktop.org>
To:	Jike Song <albcamus@...il.com>
Cc:	Ben Nizette <bn@...sdigital.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: BUG: unable to handle kernel NULL pointer dereference at 
 0000000000000004

On Wed, 2009-10-21 at 14:25 +0800, Jike Song wrote:
> On Wed, Oct 21, 2009 at 2:15 PM, Ben Nizette <bn@...sdigital.com> wrote:
> > On Wed, 2009-10-21 at 13:04 +0800, Jike Song wrote:
> >
> >> Pid: 3427, comm: Xorg Tainted: G      D    2.6.32-rc5-00011-g2fdc246
> >
> > the "D" means this isn't the first oops/bug since boot; please post all
> > bugs and/or full dmesg.  Given all the invalid ioctl noise an Xorg
> > version might help too.
> >
> > Thx,
> >        --Ben.
> 
> Ben,
> 
> Thank you for telling me this. The whole dmesg output is attached.
> 
> --
> Thanks,
> Jike

I think you have activated radeon KMS and you have a too old userspace.
You need git version of libdrm,xserver,ddx,mesa to be able to use KMS.
See: http://dri.freedesktop.org/wiki/Radeon

That being said it should not oops or bug, i will recheck this code.

Cheers,
Jerome

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