i8k shows incorrect fan speed on laptop Dell E6510 latitude

Bug #1060096 reported by Karol Szkudlarek on 2012-10-02
This bug report is a duplicate of:  Bug #200449: i8k fan speed values are wrong. Edit Remove
This bug affects 1 person
Affects Status Importance Assigned to Milestone

Bug Description

On Ubuntu 12.04 I've installed (modprobe i8k force=1) module on my Dell Laptop E6510. sensors shows output:

Adapter: Virtual device
Right Fan: 80730 RPM
CPU: +57.0°C

i8kfan shows:

karol@karolszk-lap:~$ i8kfan
-1 1

and rest of temperatures:

$. sensors

Adapter: ISA adapter
Core 0: +56.0°C (high = +84.0°C, crit = +100.0°C)
Core 1: +55.0°C (high = +84.0°C, crit = +100.0°C)
Core 2: +56.0°C (high = +84.0°C, crit = +100.0°C)
Core 3: +57.0°C (high = +84.0°C, crit = +100.0°C)

Adapter: PCI adapter
temp1: +54.0°C (high = +100.0°C, crit = +110.0°C)

computer from left side os very hot and its hard to use mouse on the left side bacuse of temperature....

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: i8kutils 1.33
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28
Uname: Linux 3.2.0-31-generic-pae i686
ApportVersion: 2.0.1-0ubuntu13
Architecture: i386
Date: Tue Oct 2 11:39:26 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
 PATH=(custom, user)
SourcePackage: i8kutils
UpgradeStatus: No upgrade log present (probably fresh install)

cat /proc/i8k

1.0 A11 96VMRM1 56 -22 1 -22 80730 -1 -22

and dmesg after modprobe i8k shows:

i8k: unable to get SMM BIOS version
Dell laptop SMM driver v1.14 21/02/2005 Massimo Dal Zotto (<email address hidden>)

Additionaly using this module enabled on my laptop dell E6510 causes weird usb problems: after boot up dmesg says: nobody cared (try booting with the "irqpoll" option)and mouse after a few cursor moves stops working.....

vitorafsr (vitorafsr) wrote :


Please, could you post 'i8kctl temp' here.

Also, try 'i8kfan - 2' and to see if fan switch to max speed even it is for a few seconds.

vitorafsr (vitorafsr) on 2013-05-28
affects: i8kutils (Ubuntu) → i8kutils
vitorafsr (vitorafsr) on 2013-11-23
Changed in i8kutils:
status: New → Incomplete
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