[ILUG] laptop keyboard problems

[Andrew Court]

Hi,

>From what I have read, "bad data from KBC" usually means the keyboard
controller can not understand any of the data coming into it. On a thread
which I found concerned with the same problem, one member found the problem
was down ESD. When he grounded the laptop, the problem would stop. Other
reasons for spurious signals coming from the KBC, are lose connection,
dirt/dust, and other foreign objects.

Did you say it works ok with FreeDos?

Also what distro and kernel are you using as from what I have read, some
people found changing kernel parameters solved the problem.

-A-

On 6/25/07, Michael Watterson <watty at eircom.net> wrote:
>
> Andrew Court wrote:
> > Hi,
> >
> > First-off what distro, kernel version etc are you using. What make and
> > model
> > is your laptop? Is your touchpad a Synaptic, Logitech, or ALPS touchpad.
> >
> > Read this: http://bugzilla.kernel.org/show_bug.cgi?id=6105  and let me
> > know
> > if anything help.
> >
> > Have you tried it in Windows? Do you get the same thing? I am not
> > saying you
> > have to use windows, but if you get the same thing in windows its most
> > likely a hardware issue.
> >
> > Let me know how you get on.
> >
> > Regards,
> >
> > Andrew
> >
> Freedos etc boot floppy or CD should be enough to eliminate HW vs Linux
> SW driver issue.
>
> The USB port doesn't use same SW stack all the way, so doesn't really
> tell you.
>
> Normal keyboard faults you loose keys, rows or columns, or everything
> without any error message. An actual keyboard controller fault (which it
> slightly looks like) I've seen once in 26 years of PCs. I fixed it by
> swapping the 8041.
>
> On laptops unless it is a physical keyboard fault, you are in trouble as
> usually even the touch pad & keyscan microcontroller are on the main
> board as well as any possible PS/2 KBD/Mouse 8041 type controller.
>
> >
> >
> > On 6/25/07, Michael Thompson <michaelnt at gmail.com> wrote:
> >>
> >> Hi,
> >>     my old laptop, just out of warranty, has a problem where the
> >> keyboard and touch pad stop working. If i plug in a usb keyboard i can
> >> keep working. dmesg says
> >>
> >> psmouse.c bad data from KBC - timeout bad parity
> >>
> >> Is this a software or hardware problem? Any ideas?
> >>
> >> Michael
> >> --
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>
>
> --
> Mike
>
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