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Hi everyone,
I am running Arch Linux (64 bit) and have noticed that warm air is constantly produced from fans. When in windows, this is not the case. Acpi-t shows temp at both cores as 47 C. Is there something that can be done/what is the cause? Thank you
Linux is written to use system resources (i.e. RAM, CPU) for better performance, as opposed to persistent HDD swapping like Windows. This, in turn, will cause your CPU to run a little warmer. While you might be able to make adjustments in BIOS concerning fan control, 47C isn't detrimental to your system.
- Run 'top' to see what is using CPU and what might be keeping it constantly running... kill any process that is using a lot of cpu and see if it makes a difference.
- Check packages that do CPU scaling .. I run Ubuntu and it's built-in as an applet you can add.. you can throttle the CPU so that it keeps things 'cool'. But .. it shouldn't be running hot unless there is a process using CPU .. so I would suspect some process is running..
I've noticed similar behavior when various distros kickoff 'utility' commands.. for example -- running updatedb or similar things.. I often find a cron task like this running when I notice a sudden spike in CPU.
I look over the /etc/cron.hourly, daily, weekly directories and erase or hide (rename whatever to .whatever) things I don't think are necessary to be run regularly.
Which Prozessor/Mainboard do you have? with most modern processors it is possible to control the CPU-frequency. For example I'm using the governor "conservative" and the system always tries to run with the lowest possible frequency. My output of the cpufreq-info command is:
Code:
markus@samsung:~$ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: powernow-k8
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 8.0 us.
hardware limits: 800 MHz - 2.10 GHz
available frequency steps: 2.10 GHz, 1.50 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 800 MHz and 2.10 GHz.
The governor "conservative" may decide which speed to use
within this range.
current CPU frequency is 800 MHz.
analyzing CPU 1:
driver: powernow-k8
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 8.0 us.
hardware limits: 800 MHz - 2.10 GHz
available frequency steps: 2.10 GHz, 1.50 GHz, 800 MHz
available cpufreq governors: conservative, ondemand, userspace
current policy: frequency should be within 800 MHz and 2.10 GHz.
The governor "conservative" may decide which speed to use
within this range.
current CPU frequency is 800 MHz.
markus@samsung:~$
I have an AMD processor. I'd recommend to read the Arch-documentation: https://wiki.archlinux.org/index.php...quency_Scaling
Since Arch has an excellent documentation this should help you. If it doesn't please provide additional information about your processor and please post the output of
Code:
lsmod | sort
If the CPU-frequency isn't the problem, you may have to look into the BIOS and check if there is a setting for the fan-control.
Thanks for the responses. Here is an image of top and acpi -t http://img196.imageshack.us/i/201104...1600x900s.png/. Don't see anything out of the ordinary, very little cpu usage (I have Intel Centrino 2) and I have 6 GB ram. So it really shouldn't run this hot and constantly be working, should it? It seems like disk is spinning up quite often even though I have hdparm set to 254 when plugged in/128 on battery (using laptop-mode-tools).
With regards to cpu frequencing, I have installed laptop-mode-tools/cpufrequtils. I have configured the settings to use performance on AC and conservative governor on battery. I have acpid installed and in daemon array to monitor power events; when I have power source, cpufreq-info shows performance (both cores at 2 GHz), and correctly shifts to conservative (both cores 800 MHz) when I unplug. Nothing happens when I plug back in, however, and cpufreq-info still shows conservative. Any idea what could cause this? Here is cpufreq.conf and also the output of acpi_listen when I unplug (first part) and plug back in (second).
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