Re: 2.4.0 APM w/ Compaq 16xx laptop...

Erik Mouw (J.A.K.Mouw@ITS.TUDelft.NL)
Mon, 8 Jan 2001 22:15:44 +0100

On Sun, Jan 07, 2001 at 07:57:42PM -0800, Brian Macy wrote:
> Anyone get this working? If so please tell me the version of you APM utilities
> and what Power Management options you have on in the kernel.
>
> Ever since I started trying 2.3.x, as soon as the box gets a change in it's
> power status (even just an update of the % battery) Linux locks solid. It's 100%
> repeatable.

Sounds like the kernel is using ACPI reserved memory, so the first ACPI
event corrupts kernel memory and the kernel locks up.

I've seen similar problems with an IBM ThinkPad 600X, but it was fixed
somewhere in 2.4.0-pre12-test7. Try linux-2.4.0, if that doesn't work,
boot the kernel with "mem=1MB-less-than-the-machine-actually-has", so
for a 128MB machine, try "mem=127M".

Erik

-- 
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031,  2600 GA Delft, The Netherlands
Phone: +31-15-2783635  Fax: +31-15-2781843  Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
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