Re: APIC frequency too slow on HP dv5z

[Howard Chu <hyc@symas.com>]

Thomas Gleixner wrote:
> On Tue, 30 Sep 2008, Howard Chu wrote:
>
>> 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?
>
> Hmm, strange. Which kernel version ?

I only started paying attention recently. 2.6.27-rc4 thru rc7 for sure. I'm 
running rc7 right now, that's what those log snippets are from.

-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/