/proc/acpi/fan does not exist

[shadow]

On Ubuntu 10.10. still exist /proc/acpi/fan/*
On Ubuntu 11.04 /proc/acpi/fan does not exist.
$ acpitool -f
  Fan : <not available>
$ ls -l /proc/acpi
összesen 0
dr-xr-xr-x 3 root root 0 2011-07-31 10:17 ac_adapter
dr-xr-xr-x 3 root root 0 2011-07-31 10:17 battery
dr-xr-xr-x 5 root root 0 2011-07-31 10:17 button
-r-------- 1 root root 0 2011-07-30 18:10 event
-rw-r--r-- 1 root root 0 2011-07-31 10:17 wakeup

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: acpi (not installed)
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
Architecture: i386
Date: Sun Jul 31 10:05:29 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=hu_HU:en
 LANG=hu_HU.UTF-8
 SHELL=/bin/bash
SourcePackage: acpi
UpgradeStatus: No upgrade log present (probably fresh install)

[Timothy Mayoh (timothy-m-deactivatedaccount)]

Is this actually causing any noticeable problems with your system, apart from the fact that it is simply not there?

[shadow (arnyek)]

After doing a suspend to RAM, the fan is always on.
On Ubuntu 10.04 help this script: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/77370/comments/28

My laptop: HP 4310s

[Timothy Mayoh (timothy-m-deactivatedaccount)]

It appears the bug you have reported is a duplicate of bug #77370, so I will mark it as such.

Many thanks,
Timothy

[shadow (arnyek)]

More information:
Before suspend (AC power plugged in):
$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +16.0°C (crit = +108.0°C)
temp2: +39.0°C (crit = +105.0°C)
temp3: +42.0°C (crit = +108.0°C)
temp4: +43.0°C (crit = +105.0°C)
temp5: +36.8°C (crit = +108.0°C)
temp6: +40.0°C (crit = +110.0°C)
Suspend...
10 second later wake up (power button). temp6 = +49.0°C. Fan is ok, not always on!
Try again.
Suspend...
2 minutes later wake up (power button). temp6 = +90.0°C. Fan is always on.
Plug off AC power for 1s, then plug in again: temp6 step by step go back 40°C and fan go back normal speed.
(Sorry for my bad english)