Message-Id: <20070308115843.8d264f91.thatistosayiseenem@gawab.com>
Date:	Thu, 8 Mar 2007 11:58:43 +0000
From:	Ash Milsted <thatistosayiseenem@...ab.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-acpi@...r.kernel.org, torvalds@...ux-foundation.org,
	dmitry.torokhov@...il.com
Subject: Re: 2.6.21-rc2 regression vs. 2.6.20: AT keyboard only works with
 pci=noacpi

On Wed, 7 Mar 2007 23:49:14 +0000
Ash Milsted <thatistosayiseenem@...ab.com> wrote:

> On Wed, 7 Mar 2007 21:25:34 +0000
> Ash Milsted <thatistosayiseenem@...ab.com> wrote:
> 
> > On Wed, 7 Mar 2007 12:00:04 +0000
> > Ash Milsted <thatistosayiseenem@...ab.com> wrote:
> > 
> > > On Sun, 4 Mar 2007 14:23:50 +0000
> > > Ash Milsted <thatistosayiseenem@...ab.com> wrote:
> > > 
> > > > On Sat, 3 Mar 2007 15:14:24 +0000
> > > > Ash Milsted <thatistosayiseenem@...ab.com> wrote:
> > > > 
> > > > > Hi,
> > > > > With 2.6.21-rc2-git1 I have a problem with my ps/2 port keyboard - it only works
> > > > > with one of the following on the command-line:
> > > > >  - nolapic
> > > > >  - irqfixup
> > > > >  - pci=noacpi
> > > > > Otherwise it gets stuck with the numlock on.
> > > > > The following options have no effect:
> > > > >  - nohz=off (who knows eh?)
> > > > >  - pci=nomsi
> > > > > 
> > > snip
> > > > > 
> > > > > Ash
> > > > 
> > > > Just checked 2.6.21-rc2-mm1, still has the problem.
> > > > Also, acpi=noirq fixes it too.
> > > > To clarify, the problem is that my ps/2 port keyboard is completely frozen
> > > > on boot - usually it gets activated when udev probes for hardware (my kernel
> > > > config is highly modular). It worked fine with 2.6.20 and earlier with acpi 
> > > > taking care of interrupt routing.
> > > > 
> > > > Ash
> > > 
> > > Any thoughts on this? It still occurs with 2.6.21-rc3. Here's my config
> > > in case that helps. You'll see that I have swap-prefetch patched in (I
> > > also have RDSL and some VM changes in there), but I have confirmed that
> > > the problem occurs with no extra patches. By the way, I tested mm1 with
> > > a rather different config (I used my distro package) and still saw the
> > > problem.
> > > 
> > > Also, you should probably ignore that bit above where I suggest the
> > > keyboard driver is being loaded as a module, because of course it
> > > isn't.. Yet it does start responding (with pci=noacpi) at about that
> > > time that udev does its thing.
> > > 
> > schnip
> > 
> > So, I tracked this down to 2.6.21-git7, the first snapshot that gives me
> > this problem. Tellingly it does contain an input tree merge. I would git bisect
> > but I don't have a local copy of the tree - I tried to get one, but it stopped
> > halfway through the clone, probably because I had to use http... So, I hope that
> > helps.
> > 
> > Ash
> > 
> > PS: I should have said I'm not subscribed, so please CC me on reply.
> > PPS: That almost rhymes. Almost.
> 
> Apologies for only replying to my own mails, but I need to be CC'd if
> any alternative is to be convenient :)
> 
> Linus, thanks for your detailed messages. I will try to get a bisect done, but 
> the university firewall is likely to put up a fight against rsync as much as it
> does with the git protocol. We will see. And yeah, that 2.6.21-git7 business was
> a typo, should've been 2.6.20-git7, natch.
> 
ker-cut

>Argh, I can't believe I forgot to get this into my tree. Could you
>please tell me if the patch below fixes ytour issue?

Yup, that patch really hit the spot. Now I don't have to bisect :)

Thanks for your help (both of you),

Ash
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