Bug 141097 - Plugging an USB storage device turns up CPU fan
Summary: Plugging an USB storage device turns up CPU fan
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: 3
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Dave Jones
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2004-11-29 08:24 UTC by Richard Körber
Modified: 2015-01-04 22:13 UTC (History)
2 users (show)

Clone Of:
Last Closed: 2005-10-03 00:25:13 UTC

Attachments (Terms of Use)

Description Richard Körber 2004-11-29 08:24:53 UTC
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Description of problem:
I have enabled powernow_k8 (Cool'n'Quiet) on my AMD64 system. The CPU
fan has a low RPM and is quiet, as I expect it.

Now, as soon as I plug in an USB storage device (here it is a mobile
USB harddisk), the CPU fan starts turning up to max speed, as if the
system has a high load. Anyhow "top" shows that the system is idle.

The CPU fan will stay at max speed, even after the USB storage device
has been disconnected again. I have to reboot the system in order to
have a functional powernow_k8 again.

I stated the severity as Low since except of the CPU fan, the system
behaves normally -- there is no crash or data loss, not does it seem
to be slower. Anyhow it is very annoying since the CPU fan makes quite
some noise.

It's an FC3/x86_64 installation with all current updates applied.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Enable powernow_k8 module, wait until CPU fan slows down
2. Plug in an USB storage device (e.g. an USB harddisk)

Actual Results:  The CPU fan turns up to max speed. This speed is kept
until system is restarted.

Expected Results:  The CPU fan might turn up for a short time (if at
all) after the USB device has been plugged in, but it should slow down

Additional info:

I suspected the haldaemon first. But a "service haldaemon stop" before
plugging in the USB device didn't change the behaviour.

I assume the bug is somewhere in the usb-storage module, the
powernow_k8 module or the kernel itself, since "top" is showing an
idle system. Sorry if I am wrong.

Comment 1 Dave Jones 2005-07-15 19:43:53 UTC
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which
may contain a fix for your problem.   Please update to this new kernel, and
report whether or not it fixes your problem.

If you have updated to Fedora Core 4 since this bug was opened, and the problem
still occurs with the latest updates for that release, please change the version
field of this bug to 'fc4'.

Thank you.

Comment 2 Dave Jones 2005-10-03 00:25:13 UTC
This bug has been automatically closed as part of a mass update.
It had been in NEEDINFO state since July 2005.
If this bug still exists in current errata kernels, please reopen this bug.

There are a large number of inactive bugs in the database, and this is the only
way to purge them.

Thank you.

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