Re: APM woes: IBM T20 Thinkpad

From: Alex Bligh - linux-kernel (
Date: Sun Dec 09 2001 - 13:54:20 EST


--On Saturday, 08 December, 2001 11:20 PM +0000 Alex Hudson
<> wrote:

> I'm running a self-compiled Linux 2.4.16-pre1 on a IBM-T20, and am
> seeing problems with APM.
> If someone could point out some tests I could try to pin this down, or
> has some other suggestion, I would be very grateful.

This is what I did to try and get a T23 to work (which isn't
a T20, I know).

First upgrade your BIOS and/or system controller - available
FOC from the IBM web site.

If that doesn't fix it, try changing whether or not interrupts
are allowed during suspend. I think for a T20 they should *not*
be, but the T23 crashes if they are *not* (and needs it the
other way around). Don't just fiddle with the config option as
pci_quirks will override it. Either look at doing something like
or just frig the code yourself to force apm.allow_ints one way
or another.

Alex Bligh
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