Re: 2.6 kernel won't reboot on AMD system - 8042 problem?

Dmitry Torokhov
2004-08-08T15:05:24Z

On Sunday 08 August 2004 07:18 am, Sascha Wilde wrote:
> On Fri, Aug 06, 2004 at 10:22:57AM +0200, David N. Welton wrote:
> > [ Re-added Sascha to the CC, as he's interested in this too. ]
> >
> > James Lamanna wrote:
> >
> > >Change i8042.c:62 to
> > >#define DEBUG
> > >And see what printk's you get on trying to reboot.
> > >i8042_command has a bunch in it that are turned off by default.
>
> I just did some further testing, the problem here is exactly the same
> as Davids. And thinking about the exact point of failure and that
> Davids reboot problem is related to the keyboard being attached or not
> I realized what causes the problems for me:
>
> I have a keyboard attached to the PS/2 port, but my mouse is attached
> to USB. So I pluged in a PS/2 mouse, and guess what? The box
> rebooted!
>
> Well, this is by no means a solution, but I think it's pretty clear
> now, what exactly causes the trouble. Now we have to find out, why
> the i8042 code in 2.6.x breaks things on sertain hardware when there
> are not devices present in all ports, while in 2.4.x everything went
> well...
>

You could also try out the following scenario: remove your USB mouse and
_do not_ plug PS/2 one... What you might be seeing is another case of USB
Legacy emulation thingy getting in your way.

--
Dmitry