copied from: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836480 creating new bug here as per comment #22 1. Till login screen fan speed is ok 2. Soon after login fan starts running like crazy. The air coming out becomes hot after sometime. 3. Fan works quite normally on windows 7 4. Works fine with on 11.04. 5. I booted and worked using Open Suse 11.04 , fan was fine.
when you run top, does it show that a process is running 100% of the time? which process? If no process is implicated above... can you reproduce this using an upstream kernel.org kernel? if yes, what is the oldest kernel that 1st see's this issue, and the newest kernel that does not see this issue?
1. top says system is 89.9% idle 2. I do not remember the exact version now but the kernel that comes with 11.04 was perfect. 11.10 is the one with problem. When I was using 11.04 I had the latest kernel. I asked https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836480 as well, I am not an expert can someone guide me how to test different kernels without having to reinstall?
Yesterday I was trying to solve some other problem, following steps given on this page http://www.ivegotavirus.com/blog/2011/11/06/how-to-get-optimus-working-on-ubuntu-11-10-oneiric/ Soon after step 3) sudo apt-get install bumblebee, fan started working fine. Is this related? Now fan works fine. I haven't finishe the steps mentioned on the page. Just installed bumblebee, now fan is working normally. I also keep ubuntu uptodate so not sure if that is also related. I am using 3.0.0-16-generic x86_64
I googled bumblebee but it seems that it has nothing to do with Fan? please attach the output of "grep . /sys/class/thermal/*/*". and try "echo 1,0 > /sys/class/thermal/cooling_deviceX/cur_state", while cooling_deviceX type is FAN. But anyway you can not reproduce the problem right now, right?
No, I am not able to reproduce the problem now.
well, how to debug without reproducing it? can you reproduce the bug if you remove bumblebee?
ping...
Yes I was able to reproduce after unisntalling bumblee. sudo apt-get remove bumblebee It removed bumblebee and bumblebee-nvidia After reboot fan is going crazy. Attaching output of "grep . /sys/class/thermal/*/*"
Created attachment 88901 [details] "grep . /sys/class/thermal/*/*" output
I reinstalled BumbleeBee and fan is normal. No need for reboot sudo add-apt-repository ppa:bumblebee/stable sudo apt-get update sudo apt-get install bumblebee bumblebee-nvidia
Possibly related issue: bug #57051.
(In reply to comment #10) > I reinstalled BumbleeBee and fan is normal. No need for reboot > do you mean the fan problem can not be reproduced any more after reinstalling BumbleeBee?
Please also attch acpidump output here, thanks.
problem is resolved by reinstalling a user space tool.