Messages in this thread | | | Date | Thu, 02 Oct 2008 15:56:22 -0700 | From | Howard Chu <> | Subject | Re: APIC frequency too slow on HP dv5z |
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Thomas Gleixner wrote: > On Thu, 2 Oct 2008, Howard Chu wrote: >> 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. > > Ok. Can you please add apic=verbose to the kernel command line so we > get more detailed info about that ?
OK. Of course since you asked for it, the problem refused to show up. It took about a dozen reboots before it appeared again. And then it took 3-4 reboots to make it go away. Full dmesg output is here: http://www.highlandsun.com/hyc/msg.rc7.bad.gz http://www.highlandsun.com/hyc/msg.rc7.ok.gz
-- -- 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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