Re: Bizzare crashes on IBM Thinkpad A22e

Erik Mouw
2001-08-30T17:50:49Z

On Thu, Aug 30, 2001 at 11:46:19AM -0400, Tester wrote:
> I've just received an IBM Thinkpad A22e. Using kernel 2.4.2-2 (redhat 7.1
> version) or the stock 2.4.4 or 2.4.9 (they all exhibit the same problem).

Uh-oh, another broken Thinkpad BIOS.

> When I use any of the APM functions or any of the thinkpad keys (volume
> keys and Fn-Fx keys.. for suspend and even display brightness), the whole
> system freezes without any other indication. This is using a kernel with
> APM compiled it, but without any other option. If I compile in ACPI
> instead of APM, it freezes even before the kernel is done booting. But, it
> worked perfectly well with the 2.2.19-2 kernel form Mandrake 7.2

Hmm, linux-2.2.19pre4 got the "thinkpad E820 edx overwriting" for a
Thinkpad 600X from Marc Joosen. The same fix also went into
2.4.0-test13-pre6, so that can't be the problem.

> Everything else seems to work fine... can anyone help?

Could you try to boot with "mem=one MB less than the machine actually
has" and see if that fixes the problem? So "mem=127M" for a 128MB
machine. If that fixes the problem, I think there is a bug in the e820
BIOS memory map and you should ask IBM to fix their BIOS.

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/