http://bugzilla.kernel.org/show_bug.cgi?id=10658
------- Comment #70 from martin-kernel-bugzi...@earth.li 2009-02-25 15:35 ------- Len, Thanks for getting this patch accepted. It sounds like it provides a useful catch for similar problems with other machines, even if we can ultimately resolve this particular case without resorting to polling. I have kept the laptop in its original state, and have been using Matthew's patches, although am currently running an *unpatched* 2.6.28.1 kernel. This is what happens with that, if I run the CPU flat out: The GPE 0x1D interrupts start at 91 C, i.e 10 degrees below the critical trip point. They then come in every ~10ish seconds after that (not consistent, seems to be something like 7-15 sec, maybe related to the increasing temprature). When the temperature hits 97 C, several things happen. I get "processor CPU0 00000080 00000001" on /proc/acpi/event. The CPU clock frequency drops from the max 2GHz to 1.6GHz, and the temperature drops immediately to about 85 degrees. Then a few seconds later, I get "processor CPU0 00000080 00000000" on /proc/acpi/event. The CPU goes back up to 2GHz, and the temperature jumps back to 97-98 degrees. This cycle continues, spending what seems to be 5 seconds at each frequency, but the temperature on return to 2GHz keeps increasing towards the trip point. So I guess the BIOS is already trying to do something itself here via SMI, but it's not acheiving the desired results. It is sending out ACPI events though, which presumably we should be using instead of polling to trigger our own passive cooling efforts. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is. ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
