linux-kernel - Re: Kernel 2.6.30 and udevd problem

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Date:	Thu, 6 Aug 2009 14:30:12 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Alberto Gonzalez <alberto6674@...il.com>
Cc:	Michal Soltys <soltys@....info>, Dave Airlie <airlied@...ux.ie>,
	Kay Sievers <kay.sievers@...y.org>,
	linux-kernel@...r.kernel.org, linux-hotplug@...r.kernel.org
Subject: Re: Kernel 2.6.30 and udevd problem

On Thu, 6 Aug 2009 15:53:23 +0200
Alberto Gonzalez <alberto6674@...il.com> wrote:

> On Thursday 23 July 2009 02:06:36 Alberto Gonzalez wrote:
> > > On Wednesday 22 July 2009 21:44:36 Jesse Barnes wrote:
> > > > Hm, so this type of interrupt problem is *supposed* to be
> > > > handled by setting of the PEG_BAND_GAP_DATA reg (low bits set
> > > > to 0xd).  Do you have that in your tree?  Does git master have
> > > > this problem?
> >
> > I've tested 2.6.31 from git and I can reproduce the problem.
> > Attached is the dmesg with the debug patch applied.
> >
> > > > Maybe we need to add a patch to 2.6.30.x to set
> > > > PEG_BAND_GAP_DATA as a workaround (git master already has code
> > > > to do this properly for HDMI and DP outputs afaict).
> 
> Hi,
> 
> No updates here? I was wondering if it would be more useful to open a
> bug report so that it doesn't get lost. It is a rather nasty bug that
> keeps me using .29 kernel, and since it seems to be clear where the
> problem is it seems a pity to let it go...

Yeah, sorry was on vacation.  A bug report would be great, can you
file one at bugs.freedesktop.org against drm/intel?  I think I know
where the issue might be, but I'll have to come up with some more test
patches for you.

-- 
Jesse Barnes, Intel Open Source Technology Center
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