Messages in this thread | | | Date | Sat, 31 Jan 2009 00:06:03 -0800 (PST) | From | Andrew Watts <> | Subject | Re: Thermal problems with newer kernels |
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Robert Hancock wrote: >Andrew Watts wrote: >> Dear Kernel Gurus: >> >> Below is a problem that I am unable to explain along with relevant(?) in >> fo. Please leti me know if I should provide additional debugging >> information. Thanks in advance for your assistance! >> >> -Andy >> >> [1] Problem: HP Pavilion zv5000 laptop idle temp is 17 degrees higher >> when running most recent kernels (57C versus 40C). >> >> [2] Brief Description >> >> Newer kernels (noticed starting with 2.6.27.3 but could have started any >> time past 2.6.26.7) result in a much higher idle CPU temp. Physical >> temperature reading of exhaust from primary cooling fan and the regular >> triggering of secondary cooling fan confirms this (it is not a readout >> scaling issue). The kernels and temps below: >> >> 2.6.26.7 Idle temp 40C >> 2.6.27.3 Idle temp 57C >> 2.6.28 Idle temp 57C >> >> The only third party kernel module installed that is not part of the >> official kernel source is: madwifi-ng. However, the problem occurs even >> when this module is not loaded. >> >> The .config file used for the newer kernels was imported from the >> working 2.6.26.7 .config file. > >CPU frequency scaling not working perhaps? What's your dmesg output from >bootup look like? Is the acpi-cpufreq driver being loaded?
I thought I had checked this but...the problem goes away with "nolapic" (i had configured lapic into previous kernels, even though a uniprocessor, because it solved minor IRQ issues). Broken HP APIC? I fixed the IRQ issue by forcing IRQ balancing. Interesting that this starts with 2.6.27.x.
Many thanks for your response.
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