On 2/16/07, Len Brown <lenb@xxxxxxxxxx> wrote:
On Friday 16 February 2007 13:25, you wrote: > On 2/16/07, Len Brown <lenb@xxxxxxxxxx> wrote: > > On Friday 16 February 2007 02:46, Andras Lorincz wrote: > > > > > and the output of cat /proc/acpi/thermal_zone/*/* is: > > > > > > cooling mode: active > > > polling frequency: 30 seconds > > > state: ok > > > temperature: 49 C > > > critical (S5): 105 C > > > passive: 79 C: tc1=3 tc2=1 tsp=80 > > > devices=0xf7e9c720 > > > active[0]: 65 C: devices=0xc17e4d9c > > > active[1]: 55 C: devices=0xc17e4d38 > > > > > > Some remarks: > > > > > > - the polling frequency is not set by default so I > > > run a script on startup which sets the polling > > > frequency to 30 secs > > > > if you don't set polling frequency it is 0? > > Does anything not work in that case? > > > > That is the ideal case -- as polling frequency 0 > > means that the system is event-driven. > > > > If you need to enable polling b/c something isn't working, > > 3 seconds may be more prudent than 30 seconds. > > > > > - the state reported by > > > /proc/acpi/thermal_zone/THRM/state changes correctly > > > according to changing temperatures but it is not in > > > accordance with the real state of the cooler. > > > > Do you have /proc/acpi/fan/*/* files? > > What do they say? > > > > -Len > > > > Now I'm playing around with 2.6.20. If I don't set the polling > frequency at boot time then cat > /proc/acpi/thermal_zone/polling_frequency gives me: > > <polling disabled> > > I also tried setting the polling frequency to 0 but doesn't help. ls > /proc/acpi/fan gives me: right, polling frequency of 0 disables polling. when polling is disabled, the thermal system is event driven. why do you want to enable polling -- what is not working when it is disabled? > FAN0 FAN1 > > and ls /proc/acpi/fan/FAN0 and ls /proc/acpi/fan/FAN1 give me: > > state s/ls/cat/ -Len
The CPU cooler doesn't start spinning when temperature raises, although the output of `cat /proc/acpi/thermal_zone/THRM/state` changes according to the temperature, so if temperature is less than 55 then `cat /proc/acpi/thermal_zone/THRM/state` returns state ok, if temperature is between 55 and 65 then it returns state active[1] and finally if temperature is higher then 65, `cat /proc/acpi/thermal_zone/THRM/state` returns active[0] but the cpu cooler won't ever start. If I issue the commands `echo 3 > /proc/acpi/fan/FAN0/state` and `echo 0 > /proc/acpi/fan/FAN0/state` then the cooler starts but then never stops even if the temperature falls bellow 55 and manually also can be stopped by `echo 3 > /proc/acpi/fan/FAN0/state`. The same situation with polling set or not. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
