Which version of SuSE are you running? I am running 10.0, with kernel 2.6.14. As I said, the files of interest are in the directory '/proc/acpi/thermal_zone/THRM/', but not all of them can be written to. The directory '/proc/acpi/fan' is empty on my system. If the fan trip points are controlled by the BIOS (and in my system they seem to be), you probably won't be able to change them. After all, if you were able to change them and placed the wrong values, your nice laptop could go up in smoke --literally! Furthermore, if the ambient temperature is too high, radiative cooling may not be enough, so the fans will HAVE to run all the time. BTW, I tried editing the '/proc/acpi/thermal_zone/THRM/trip_points' file with vim (as root), but after the write vim warned me that the file I was editing on the screen no longer matched the file on disk or something like that (which should not happen with a normal file). I read the SuSE 9.3 manual (the last big manual in print as they went to all electronic 10.0); it clearly states that most of the values in these files are for information as the BIOS controls most, if not all, of them. That is all I know. Maybe the kernel experts here have better answers for you. After my initial adventures with overheating, HP replaced my 64-bit laptop and the one they gave me seems to run very cool. CF guru shashi wrote:
Hii
Here are the details you asked for:- Could not find the fan config details ... says as not such files of directory.
#cat /proc/acpi/fan/*/* cat: /proc/acpi/fan/*/*: No such file or directory
# cat /proc/acpi/thermal_zone/*/* <setting not supported> cooling mode: passive polling frequency: 2 seconds state: ok temperature: 52 C critical (S5): 97 C passive: 93 C: tc1=2 tc2=3 tsp=40 devices=0xffff81001bee9b80
Thanks Guru
On 3/10/06, *Constantine 'Gus' Fantanas*
mailto:fantanas@innocent.com> wrote: guru shashi wrote: > ... > BTW ... while building openssl ... CPU load always shows 100%. > > #powersave -rT > Thermal Device no. 0: > Temperature: 68 > Critical: 97 > Passive: 93 > 1600.048706 MHz > > Is there anyways I could opt my fan to keep runnin ... all time? > This isn't supported in my bios. > > Best Regards, > Guru > > In order to make valid comparisons, we should also note the ambient temperature. The fans cannot cool to below ambient. My AMD64 is 2.2 GHz. When it runs at 800 MHz, this is what I get at an ambient temperature of 25°C:
gus@presario:~> powersave -rT Thermal Device no. 0: Temperature: 37 Critical: 90 Passive: 88 797.938721 MHz
Since I have not resolved the java issue with my OpenOffice, which puts a lot of load on the CPU, I used it as a means to get the CPU to run at 1.8 GHz and even 2.2 GHz for a while. This is what I get then:
gus@presario:~> powersave -rT Thermal Device no. 0: Temperature: 61 Critical: 90 Passive: 88 2194.327637 MHz
You can find files with fan settings and other parameters relating to thermal management in the directory '/proc/acpi/thermal_zone/THRM'. Since your BIOS may be controlling most of these settings, I don't know which of them would have any impact if set by the user --if they can be written to. Nonetheless, they may give you a better idea of how your system works.
CF
-- Running 64-bit Linux on AMD64
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-- Running 64-bit Linux on AMD64