Ubuntu: Fan running uncontrolled on Dell Vostro 3560 under Ubuntu 12.10



Question:

EDIT: It is 4 months since I asked this question, more than 1000 views, but the bug is still unassigned on launchpad. I suggest that everybody affected logs in and subscribes himself as being affected.

I have switched off the dedicated graphics:

0:IGD:+:Pwr:0000:00:02.0  1:DIS: :Off:0000:01:00.0  

This is the output of the "sensor" - command, whith fan running on full speed:

 radeon-pci-0100  Adapter: PCI adapter  temp1:       -128.0°C      coretemp-isa-0000  Adapter: ISA adapter  Physical id 0:  +42.0°C  (high = +87.0°C, crit = +105.0°C)  Core 0:         +41.0°C  (high = +87.0°C, crit = +105.0°C)  Core 1:         +41.0°C  (high = +87.0°C, crit = +105.0°C)  

Is there a safe solution to this, and when can we expect ubuntu to cover fan throtteling?

EDIT: Weirdly enough, it now suddenly switched off almost completely . Here is the sensor - output again:

radeon-pci-0100  Adapter: PCI adapter  temp1:       -128.0°C      coretemp-isa-0000  Adapter: ISA adapter  Physical id 0:  +41.0°C  (high = +87.0°C, crit = +105.0°C)  Core 0:         +41.0°C  (high = +87.0°C, crit = +105.0°C)  Core 1:         +39.0°C  (high = +87.0°C, crit = +105.0°C)  

This is weird! But the behavior seems to correspond to the bug report filed here: https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/1049064

EDIT: I am running the gnome3- flavour


Solution:1

Check out my answer on launchpad, it seems like the actual root of the problem has been found:

Hi, I think that I should write here as I was also having this problem for over a year. Last week I gave google next try and it occured that it's hardware problem in some of dell's laptops family. I've been using i8k since ubuntu 12.10 till yesterday. Look on this post: http://en.community.dell.com/support-forums/laptop/f/3518/t/19511930.aspx

I've added heat sink like this guy suggested and now everythink works like should without i8kfan. I have checked temperatures and it looks that dell is suppressing fan control in windows with drivers. I've tested it in such way that after turning laptop on I stopped on uboot screen and waited for couple of minutes. Fan shortly hit the maximum so then next step was to boot into windows. Fans stopped immediately after couple of seconds but I've checked and temperature of PCH was always >65Degress. Now after installing termalpad and small copper heat sink temp is ~50 and even on grub menu fans are quiet. I think this is only reasonable solution. Some dell's guy just f-u-c-k-e-d up design cause thermal plate which covers almost all main board is cut on PCH chip so it is without any thermal sink. they should repair such things on warranty. Hope this helps, after over a year it is really pleasant to have it finally quiet.


Solution:2

I am not sure if this is a bug, but I have experienced exactly issue in my system(Intel Core i3) after the upgrade. The CPU eventually is heating and tripping up. What I ended up doing was install "Jupiter Applet", and setting Performance="Power saving" to fix the issue. There is some issue in 12.10 release that is causing it. Hope this helps you!!


Solution:3

Fans are controlled by the hardware. Some hardware has drivers that can take over and allow software control if you desire ( but this is not recommended ). You can use the sensors-detect command from the lm-sensors package to see if you have such hardware.


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