Hi, I've been working steadily over the past few weeks to get my new HP nx6125 working under Debian (amd64 port) and have made significant progress. However, there is one considerable problem: thermal events don't seem to be recognised or processed by the kernel (until I do a cat /proc/acpi/thermal_zone/TZ?/temperature). As soon as I do anything CPU intensive I really run the risk of frying my laptop :-(
To be more specific, I am running kernel 2.6.14.3 (www.kernel.org vanilla) with the double timer patch applied (see http://bugzilla.kernel.org/attachment.cgi?id=6061&action=view). When I boot up, my thermal trip points get set nicely. The first is at 58 *C, then 65*C, then 75 *C, and 80*C (S5 = 95 *C). When I was testing things I was doing frequent executions of cat /proc/acpi/thermal_zone/TZ?/temperature and I would observe the temp rise to 58 C, then the fan would kick in, the first trip point would then (automatically) re-set to 50 C and the CPU would cool through 8 C before the fan turned off (nice, I thought, and very clever this re-setting of trip points--sorry I'm very new to ACPI). When the fan turned off, the trip point would again re-set to 58 C. So, I thought all was working well. However, subsequent tests done by running glxgears and not executing the above cat command allowed the CPU temp to rise above several trip points without the fans kicking in! Only when I ran the above cat command did the fans start!? So, I stopped acpid and did a cat /proc/acpi/event while running glxgears. I waited a while and then did a cat /proc/acpi/thermal_zone/TZ?/temperature to see that indeed the temp of TZ1 had exceeded 58C---and immediately /proc/acpi/event received a thermal event (note: the temp had already exceeded 58 C, my first thermal trip point; the thermal event only occurred when I did the 'cat'). So, in order for thermal events to "get through/processed" I need to keep doing cat /proc/acpi/thermal_zone/TZ?/temperature!!!! Can anybody shed some light on this behaviour. I don't know much about ACPI, but it seems (?) like the linux kernel is not processing the thermal events properly. Incidentally, I am also seeing spurious syslog errors that read APIC error on CPU0: 40(40) meaning that some interrupts presumably are not being correctly identified by the interrupt controller (thermal ones? could there be some correlation here?). Other info: the HP nx6125 is a Turion 64 based laptop with ATI chipset (yes, I know). I am running acpid and have just installed powernowd (doesn't fix it). I have also observed the above behaviour running the standard Debian 2.6.12-1-amd64 kernel (booting with no_timer_check to avoid double timer interrupts). Any help, suggestions would be greatly appreciated. If anyone has any ideas why catting /proc/acpi/thermal_zone/TZ?/temperature gets things to work, I'd be very happy to hear an explanation, too. Richard -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
