* - Tong - <[EMAIL PROTECTED]> [20070731 03:15]: > I rebooted my PC the other day, and only then I know that my CPU is > overheated, because I saw a BIOS warning. The fact that my CPU might have > been overheated for months made me consider seriously to control my CPU > frequency (My AMD cpu has that feature available in bios).
What temperature was your CPU running at? > I've tried to make use powernowd before, but never able to. I should feel > lucky this time since the latest kernel that grml 1.0-1 uses, support cpu > frequency control by default: > http://kernelnewbies.org/Linux_2_6_20 > "Grand unification of ACPI based speedstep-centrino and acpi-cpufreq > drivers. It combines functionality of these two driver into acpi-cpufreq > driver." > But the problem is that googling "acpi-cpufreq" didn't come up much > result. The closest is from > http://bbs.archlinux.org/viewtopic.php?pid=256607 > "... you should try the 'acpi-cpufreq' module. My favorite governor is the > 'conservative' one. Under load, it will ramp up the frequency, but it will > generally keep it as low as possible." > But there is no details. So I'm wondering if anyone can help me here? acpi-cpufreq is the kernel module used instead of speedstep-centrino with kernels >=2.6.20. To check your current settings regarding cpu frequency scaling check output of 'cpufreq-info'. To configure your current settings (if you aren't happy with the defaults) either manually use sysfs or use the userspace tool cpufreq-set. Is the 'thermal' kernel module loaded on your system? Check CPU temperature using tools like sensors/mbmon (depending of your hardware whether what's supported of course). If you want to read some docs regarding ACPI and cpufreq start for example with https://www.linux-magazine.com/issue/40/ACPI.pdf and https://ols2006.108.redhat.com/2007/Reprints/brown_1-Reprint.pdf and the docs inside Documentation/cpu-freq/ of current kernel sources. regards, -mika- -- http://grml.org/ # Linux for texttool-users and sysadmins http://wiki.grml.org/ # share your knowledge http://grml.supersized.org/ # the grml development weblog #grml @ irc.freenode.org # meet us on irc
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