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.
--
Vojtech Pavlik
SuSE Labs, SuSE CR
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