2003-08-04 18:06:49

by Ruben Puettmann

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Subject: [APM ERROR-REPORT] APM_DISPLAY_BLANK freezes Thinkpad R40 and Sony Z1 on suspend


hy,


enable CONFIG_APM_DISPLAY_BLANK on linux 2.4.22-pre10 and
2.4.22-pre10-ac1 freeze my Thinkpad R40 with Ati Mobile 7500 and Sony Z1
on apm -s.

Ruben

--
Ruben Puettmann
[email protected]
http://www.puettmann.net


2003-08-04 19:20:04

by Mikael Pettersson

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Subject: Re: [APM ERROR-REPORT] APM_DISPLAY_BLANK freezes Thinkpad R40 and Sony Z1 on suspend

Ruben Puettmann writes:
> enable CONFIG_APM_DISPLAY_BLANK on linux 2.4.22-pre10 and
> 2.4.22-pre10-ac1 freeze my Thinkpad R40 with Ati Mobile 7500 and Sony Z1
> on apm -s.

If you have UP_APIC or SMP enabled, then this is a known user-bug.
CONFIG_APM_DISPLAY_BLANK, CONFIG_APM_CPU_IDLE, and configuring APM
as a module instead of built-in, are known to do really bad things
with regard to BIOSen and the local APIC.

The fix, if you have APIC or SMP support, is to NOT misconfigure APM.

/Mikael