Bug 43060

Summary:	Fan working non-stop
Product:	ACPI	Reporter:	Bob Merhebi (bob.merhebi+kernel.bugzilla)
Component:	Power-Fan	Assignee:	Zhang Rui (rui.zhang)
Status:	CLOSED OBSOLETE
Severity:	normal	CC:	alan, bob.merhebi+kernel.bugzilla, rui.zhang
Priority:	P1
Hardware:	All
OS:	Linux
URL:	https://bugs.launchpad.net/linux/+bug/969485
Kernel Version:	3.3.0-030300-generic	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	some helpful info "grep . /sys/class/thermal//" output

Description Bob Merhebi 2012-04-06 22:28:22 UTC

Created attachment 72838 [details]
some helpful info

*Overview: The cooling fan is working non-stop while testing 12.04 Beta 2.

Temperatures are being maintained around:
Thermal 0: ok, 58.0 degrees C
Thermal 1: ok, 48.0 degrees C
Thermal 2: ok, 51.0 degrees C

*Device: Dell Studio XPS 1640 laptop (lshw: https://wiki.ubuntu.com/bobmerhebi/Dell%20Studio%20XPS%201640)

*Steps to reproduce: Turn on laptop & log in into Ubuntu 12.04LTS Beta 2 Desktop AMD64

*Actual Results: Cooling fan works non-stop

*Expected Results: Fan should cool the hardware & slow down &/or stop running until needed?!

*Build Date & Platform:Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)

$lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04

Comment 1 Zhang Rui 2012-11-28 13:17:06 UTC

please attach the output of "grep . /sys/class/thermal/*/*"

Comment 2 Bob Merhebi 2012-11-28 13:27:03 UTC

Created attachment 87521 [details]
"grep . /sys/class/thermal/*/*" output

Comment 3 Zhang Rui 2012-11-29 05:14:56 UTC

there is no ACPI fan control in this laptops.
so my suggestion would be
1. close the bug
2. check BIOS options and see if there is something related, e.g. "Fan always on when AC".
3. if no, upgrade your BIOS.

maybe there are some platform hacks to enable the fan control, but that is out of my scope. Sorry that I can not help you on this.

Comment 4 Zhang Rui 2012-11-29 05:24:17 UTC

Oh, BTW, you can try the tricks in bug #42605 and see if it helps.

Comment 5 Bob Merhebi 2012-11-29 12:34:55 UTC

(In reply to comment #3)
> there is no ACPI fan control in this laptops.

Is that just the fan control or do you mean all acpi sensors?
I already have acpi package installed 

> so my suggestion would be
> 1. close the bug

I'll do that.

> 2. check BIOS options and see if there is something related, e.g. "Fan always
> on when AC".

I haven't checked yet, I will soon though I am sure that there's nothing of this sort.

> 3. if no, upgrade your BIOS.

Bios is already latest!
 
> maybe there are some platform hacks to enable the fan control, but that is
> out
> of my scope. Sorry that I can not help you on this.

Thanks anyway.


(In reply to comment #4)
> Oh, BTW, you can try the tricks in bug #42605 and see if it helps.

Thanks; I checked it but I prefer I stay with the current status for now; It seems to be working good now.


Note: As a matter of fact, I think the fan is working well. It's not always on any more! Maybe it was just the Beta release! The temperatures stated in the initial Description are still relevant though I now think they are acceptable?

Currently running:
Description:	Ubuntu 12.04.1 LTS
Release:	12.04