High fan activity when locked because of no user activity

[Gert Kok]

When the computer is left alone and the system gets locked for access by passers-by, the screen is black (as expected) but then fan activity is increasing to a level that I hardly know during regular activities.

After logging in and resuming user activity fan activity drops.

(12.04)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: nautilus 1:3.4.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sat Apr 28 08:31:13 2012
ExecutablePath: /usr/bin/nautilus
GsettingsChanges:
 org.gnome.nautilus.window-state geometry '977x969+185+150'
 org.gnome.nautilus.window-state sidebar-width 105
 org.gnome.nautilus.window-state start-with-sidebar false
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to precise on 2012-04-26 (1 days ago)

[Fabio Marconi (fabiomarconi)]

Hello
Can you please reproduce the problem, then attach here, using the button below 'Add attachment or patch' the files:
/var/log/syslog
/var/log/kern.log
/var/log/Xorg.0.log
Thanks
Fabio
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

[Gert Kok (yawarakaimono)]

The fan does not start right after locking begins.

When I log in again, one of the processors has been running until that moment at 100%

When I switch the monitor tab to see the tasks, compiz is at 84% but I am not sure if that is the culprit.

I don't know if the problem depends on an application that is active, it might be:

chrome, thunderbird or rhythmbox (not playing)

will be continued when more info is available.

[Tormod Volden (tormodvolden)]

Are you able to login via ssh from another machine? By running "top" you should be able to see which process is running on the CPU.

Does this happen if you use the open-source drivers (ati instead of fglrx)?

[Gert Kok (yawarakaimono)]

On top with 100% CPU usage is compiz

The active drivers are: ATI/AMD proprietary FGLRX graphics driver

gnome-screensaver installed, not configurated

[Tormod Volden (tormodvolden)]

So it sounds like a bug in either compiz, fglrx or gnome-screensaver, but not in xscreensaver.

[Gert Kok (yawarakaimono)]

I never bothered about a screensaver. So I don't know how to change preferences.
2 things to be noticed:

/usr/bin/gnome-screensaver-preferences is not found on this system.

 'System Settings' in the menu bar does not activate anything visible.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 969860, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

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