ACPI problems with Dell laptops? (was: Jerky keyboard and mouse)

[Greg 'groggy' Lehey]

On Saturday, 19 November 2005 at 21:37:03 -0600, Stephen Montgomery-Smith wrote:
> I recently upgraded from stable-6 of Nov 4 to stable-6 of today on
> my Dell Latitude D800 Laptop, and suddenly the response of the
> touchpad mouse and keyboard was bery bad.

Heh.  I saw the subject line and thought "I wonder if this is a Dell
laptop".

> In particular, when I type about 1 in 10 key presses simply do not
> register.

This, however, is a order of magnitude worse than what I have
experienced with my Inspiron 6100.

> I ended up going back to the Nov 4 stable-6, which fixed the
> problem.

Well, it worked around it.

> Any ideas?  I am happy to provide any details you may need.

I'd guess that this is another ACPI issue like the one I reported a
couple of weeks back.  In my case, it was slow, but I didn't lose any
keystrokes.

What happens when you ping another system?  I found that the ping time
was normal (in the order of 1 µs), but it repeated only every 3
seconds.  When I unloaded ACPI, things worked normally.

I'm following this up to the ACPI list with a reminder that my message
has been there for 2 weeks.  How do I localize the problem?

Greg
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