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Message-ID: <d120d5000601100737r7b1e12edy6d4eedc4b12960fc@mail.gmail.com>
Date: Tue, 10 Jan 2006 10:37:31 -0500
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reply-To: dtor_core@ameritech.net
To: Vojtech Pavlik <vojtech@suse.cz>
Subject: Re: PROBLEM: PS/2 keyboard does not work with 2.6.15
Cc: Alan Stern <stern@rowland.harvard.edu>,
       Martin Bretschneider <mailing-lists-mmv@bretschneidernet.de>,
       linux-kernel@vger.kernel.org, Jan Engelhardt <jengelh@linux01.gwdg.de>,
       linux-usb-devel@lists.sourceforge.net, Greg KH <gregkh@suse.de>,
       Leonid <nouser@lpetrov.net>
In-Reply-To: <20060110152807.GB22371@suse.cz>
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References: <20060110074336.GA7462@suse.cz>
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On 1/10/06, Vojtech Pavlik <vojtech@suse.cz> wrote:
> On Tue, Jan 10, 2006 at 10:12:21AM -0500, Alan Stern wrote:
> > On Tue, 10 Jan 2006, Vojtech Pavlik wrote:
> >
> > > It's usually that the BIOS does an incomplete emulation of the i8042
> > > chip, while still getting in the way to the real i8042. Usually GRUB and
> > > DOS don't care about sending any commands to the i8042, and so they
> > > work. The Linux i8042.c driver needs to use them to enable the PS/2
> > > mouse port and do other probing, and if the commans are not working, it
> > > just bails out.
> > >
> > > The question of course is why the handoff code doesn't work on that
> > > platform.
> >
> > It turned out that a BIOS upgrade fixed the problem, but this doesn't
> > answer your question.
> >
> > The problem wasn't an incomplete emulation of the i8042, because when the
> > USB handoff code was commented out the PS/2 keyboard worked okay.  This
> > means the handoff, when enabled, wasn't being done correctly.  That could
> > be the fault of the USB drivers or the BIOS (or both).  We have no way to
> > tell which, because the users have all switched to the newer BIOS.
>
> As usual with BIOS interaction problems.
>

We'll just have to wait for another report. "Sluggish typing" report
looks promising.

--
Dmitry