Re: Hardware Noise Under Linux But Not XP
From: General Schvantzkoph (schvantzkoph_at_yahoo.com)
Date: 02/22/05
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Date: Tue, 22 Feb 2005 12:16:55 -0500
On Tue, 22 Feb 2005 00:29:44 -0600, Marshall Lake wrote:
> I have a dual boot system (XP & Linux). I boot into XP only rarely.
> Recently I've noticed that my computer is emitting a strange whirring
> noise (it's a new noise which wasn't present before). The thing is
> that the noise is only emitted while running Linux. While running XP
> the system is perfectly quiet.
>
> What could account for this? How can I stop the noise from happening
> while running Linux?
It's probably the CPU fan. XP has a control panel that allows you to set
different performance modes, it's possible that XP is running in a low
power mode. It's also possible that you aren't doing anything that's
particularly taxing under XP. The first thing to do is to run top or
gnome-system-monitor to see how loaded your CPU is. There might be a
process that's keeping the CPU busy. If the CPU isn't particularly busy
then it could be a fan control issue. Some motherboards have a smart fan
control mechanism in their BIOS which will vary the fan speed depending
the CPU temperature. It's possible for Linux to interfere with that
mechanism. I just got a new system with an MSI K8N Neo2 motherboard. The
Neo2 BIOS will allow you to select a CPU temperature below which the CPU
fan is off and above which it's on. The modules required by lm_sensors
interfere with this mechanism. If the i2c-isa and w83627hf modules are
loaded the fan runs all of the time. To see if you are loading any modules
for lm_sensors check /etc/sysconfig/lm_sensors (at least on Fedora Core
systems, I suspect that it's the same for many other distros). To stop
those modules from loading just comment them out.
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