resuming after suspend looses control on fan speed, which is kept at 100%

[Xavi]

HP xw6400 Workstation. Using Gnome-shell (I wonder if this matters) with Ubuntu 11.10 (64 bits).

When I suspend the machine, and resume, then fan speed seems to be at 100% for ever, until you reboot the machine.

When you hibernate, and start ubuntu again, then fan is under control (after a few seconds of 100% speed, it comes back to a under-control way: no noise, etc.).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: fancontrol 1:3.3.0-4ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Wed Nov 2 09:53:44 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=ca_ES:en
 PATH=(custom, no user)
 LANG=ca_ES.UTF-8
 LC_MESSAGES=ca_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: lm-sensors
UpgradeStatus: Upgraded to oneiric on 2011-10-20 (13 days ago)

[Xavi (xavidp)]

btw, I'm using uswsusp for suspending and hibernating.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ednilton Santos de Oliveira (esdeoliveira)]

Same here on Kubuntu 11.10 64 bits installed on a Sandy Bridge based laptop.

[Phillip Susi (psusi)]

Are you using the fancontrol package?

[Phillip Susi (psusi)]

If so, can you provide the config file, and try running the following:

sudo /etc/init.d/fancontrol stop
sudo fancontrol

Then try to suspend, resume and see if there are any errors?

[Xavi (xavidp)]

Yes, I had fancontrol installed. See below:

-----------------
xavi@camagroc:~$ sudo /etc/init.d/fancontrol stop
[sudo] password for xavi:
 * Stopping fan speed regulator fancontrol [ OK ]
xavi@camagroc:~$ sudo fancontrol
Loading configuration from /etc/fancontrol ...
Error: Can't read configuration file
-----------------

And again, after the resuming from suspending, fan speed didn't stop at all at any time (regardless of these commands on the console)

Which conf. file?

[Phillip Susi (psusi)]

It looks like you have not configured fancontrol so it isn't actually working. Can you try removing the package and see if the behavior remains the same?

[Xavi (xavidp)]

Ok, did remove (purge) the package, rebooted the machine. and then I suspended it.
Same effect: fan is still out of control.
Powering off the machine again...

[Phillip Susi (psusi)]

Then it isn't a bug in lm-sensors, but in the hardware/firmware of the motherboard.