Comment 30 for bug 453444

I get the same errors that taka jedna gets. The exact same messages about "Temperature above threshold, cpu clock throttled", etc. I mean thousands of these messages per minute. This machine has always run like this. I has always run hot and when it gets too hot the cpu is throttled down and the rpms of the internal cpu fan are ramped up. The machines originally came with Windows XP Home but I have even put windows XP Professional on it in the past with no problems. I tried disabling acpi by passing the switches "noapic nolapic acpi=off" on the grub kernel parameter line but it does not fix the problem. All that happens is that now hyperthreading (which is turned on in the bios) seems not to be recognized by the kernel. I have all the latest ubuntu 9.10 patches installed by the way. It is definitely dd and rsyslogd that are consuming cpu resources. If I tail the /var/log/messages file you can see a huge stream of these temperature cpu throttling messages flying past at a fantastic rate. I know this motherboard is supposed to work this way because it has software in the bios to shutdown the machine if the cpu temperature reaches dangerous levels. This happened once a few years ago when the copper heat exchange veins used to cool the cpu got clogged up with dust. Back then I opened the bottom of the case, cleaned out the veins and the machine started to work like normal again. Last night I checked the veins again and they were all clean and so far the machine has not shut down unexpectedly on me. All of which suggest that it is operating with normal temperature ranges.

Juan