Re: Linux-Kernels 2.4.xx, apm & P4 issues

From: Pavel Machek (pavel@ucw.cz)
Date: Tue Feb 18 2003 - 03:02:15 EST


Hi!

> and my apologies for the general direction.
>
> I have googled on this topic, asked on discussion boards
> and couldn't find any suitable hints.
>
> The problem that I encounter is happening on a mobile P4.
> When apm is active (I've compiled it as a module in
> both a 2.4.18 and 2.4.20 kernel) my system clock errs
> by as much as 90 seconds in an hour. Also, I seem to
> experience keyboard related problems (Ctrl, Alt, Shift get
> *sticky* -excuse my wording, I can't think of a better
> description- that is, if I press them while typing normally,
> even though they are released physically their functionality
> carries on. Also the cursor keys sometimes issue numbers rather
> than cursor-movement) when apm is running.

> The machine in question is a IBM Thinkpad R32, mobile P4 1.8GHz,
> 512MB RAM.

Seems that crappy apm bios takes long to execute, and interrupts are
probably off during that. Try enabling interrupts during apm; try
acpi.

-- 
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
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