Re: 2.4.22 APM problems with IBM Thinkpad's
From: Ruben Puettmann
Date: Wed Aug 13 2003 - 08:36:46 EST
On Wed, Aug 13, 2003 at 03:13:02PM +0200, Mikael Pettersson wrote:
>
> This sounds like a well-known APM/local-APIC clash.
nice to know ...
>
> Never ever use DISPLAY_BLANK if you also have SMP or UP_APIC.
not nice so ;-( how is it with acpi? Same problem?
> With APIC support enabled (SMP or UP_APIC), APM must be constrained:
> DISPLAY_BLANK off
> CPU_IDLE off
> built-in driver, not module
Why will this not be disabled in make *config so that nobody will run in
this problem?
> This is because the apm driver does BIOS calls, and many BIOSen
> (including the code in graphics cards, e.g. all Radeons it seems)
> like to hang if a local APIC timer interrupt arrives.
Yes radeonfb don't like apm -s on this thinkpad. apm -s works but on
resume it freezed some on
modprobe radeonfb;
sleep 10;
rmmod radeonfb;
sleep 10;
modprobe radeonfb;
and thinkpad freezed .
Ruben
--
Ruben Puettmann
ruben@xxxxxxxxxxxxx
http://www.puettmann.net
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