APIC frequency too slow on HP dv5z

From: Howard Chu
Date: Tue Sep 30 2008 - 15:56:07 EST


More often than not, on a warm boot I see something like this

msg.new:[ 1.940031] Using local APIC timer interrupts.
msg.new:[ 1.944031] APIC timer calibration result 466046
msg.new:[ 1.944031] Detected 0.466 MHz APIC timer.
msg.new:[ 1.944031] APIC frequency too slow, disabling apic timer

On cold boots it may see 12.5MHz, or may not...

[ 2.000584] Using local APIC timer interrupts.
[ 2.004067] APIC timer calibration result 12500236
[ 2.004080] Detected 12.500 MHz APIC timer.

I haven't figured out yet what the pattern is behind the behavior. Has anyone else seen this kind of problem before?
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
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