ACPI Thermal Zone

The problem is: my laptop fan does not work after booting into windows (it
works in Linux, or before showing the windows logon screen - then stops).
I've installed several monitoring tools (like SpeedFan) and they show me that
Thermal Zone0 temperature is 0 Celcius - which is well below the limit at
which the fan starts cooling the CPU . The problem first occured when I
unistalled VM Workstation back in October - I reinstalled it on the same day
and fan started working normally untill today when I had to reset Windows
because of a crash.
What can be done to make the temperature censor to function properly or how
can I change the CPU cooling threshold temperature to 0 ?
I am using an external cooler now but this is a temporary and unconvenient
solution.
WIndows XP Professional SP1

I have disabled the ACPI and switched to the Standard PC. This helped to
start the fan, but a number of other problems arised - after first restart
Windows has to re-recognize all the devices and change their drivers. These
changes now prevent me from booting into Windows - unless I use the Last
Known Good Config (which is the one before changing the device drivers) - ad
therefore after each reboot I have to wait until the systems updates all the
drivers.

Please help! How do I make ACPI work properly, or how can I get rid of the
driver probems under the Standard PC Config?!

"olgerd" wrote:

The problem is: my laptop fan does not work after booting into windows (it
works in Linux, or before showing the windows logon screen - then stops).
I've installed several monitoring tools (like SpeedFan) and they show me that
Thermal Zone0 temperature is 0 Celcius - which is well below the limit at
which the fan starts cooling the CPU . The problem first occured when I
unistalled VM Workstation back in October - I reinstalled it on the same day
and fan started working normally untill today when I had to reset Windows
because of a crash.
What can be done to make the temperature censor to function properly or how
can I change the CPU cooling threshold temperature to 0 ?
I am using an external cooler now but this is a temporary and unconvenient
solution.
WIndows XP Professional SP1

On Thu, 2 Mar 2006 17:52:02 -0800, olgerd wrote:

I have disabled the ACPI and switched to the Standard PC. This helped to
start the fan, but a number of other problems arised - after first restart
Windows has to re-recognize all the devices and change their drivers. These
changes now prevent me from booting into Windows - unless I use the Last
Known Good Config (which is the one before changing the device drivers) - ad
therefore after each reboot I have to wait until the systems updates all the
drivers.

Please help! How do I make ACPI work properly, or how can I get rid of the
driver probems under the Standard PC Config?!

"olgerd" wrote:


The only way that I know of to return to ACPI, is to reinstall Windows
(make sure ACPI/power management is enabled in BIOS). A repair install
might work. Give it a try. If no go, then do a clean install.

Also, you had trouble with ACPI before -- Check for updated motherboard
drivers and/or updated BIOS. Do not update the BIOS if the update does not
address ACPI issues. Also, do not update if you are not confident - a BIOS
upgrade that fails can make the computer unusable.
--
Sharon F
MS-MVP ~ Windows Shell/User

Changing to acpi does not require re-installing the OS, instead the current
hal.dll can be expanded using the source files from the installation folder.
But this is not the issue. The problem is that the ACPI thermal censor
indicates the wrong temperature, which prevent fan from cooling the CPU. This
is not the current OS specific problem - it appears the same on a
dual-installed WinXP Home Ed, but under Linux - the third OS, which is not
configured to use ACPI - the fan works fine.
My BIOS does not have the ACPI or any other power configuration settings.
Manufacturer's BIOS update is dated August 2003 - the year before I bought
this laptop, so I think it is the same.

"Sharon F" wrote:

On Thu, 2 Mar 2006 17:52:02 -0800, olgerd wrote:

I have disabled the ACPI and switched to the Standard PC. This helped to
start the fan, but a number of other problems arised - after first restart
Windows has to re-recognize all the devices and change their drivers. These
changes now prevent me from booting into Windows - unless I use the Last
Known Good Config (which is the one before changing the device drivers) - ad
therefore after each reboot I have to wait until the systems updates all the
drivers.

Please help! How do I make ACPI work properly, or how can I get rid of the
driver probems under the Standard PC Config?!

"olgerd" wrote:


The only way that I know of to return to ACPI, is to reinstall Windows
(make sure ACPI/power management is enabled in BIOS). A repair install
might work. Give it a try. If no go, then do a clean install.

Also, you had trouble with ACPI before -- Check for updated motherboard
drivers and/or updated BIOS. Do not update the BIOS if the update does not
address ACPI issues. Also, do not update if you are not confident - a BIOS
upgrade that fails can make the computer unusable.
--
Sharon F
MS-MVP ~ Windows Shell/User