laptop cpu cooling fan

[dpshea2415]

Under any version of ACPI - up to 3.11 - the cpu cooling fan does not run continuously. Under Linux the fan is on all the time and the cpu and laptop are cool to touch. Under ecs as the laptop heats up the fan comes on in bursts. Sometimes when run in Linux and warm booted into ecs the fan stays on all of the time and the cpu runs cool.

Without ACPI the fan is on all the time. I have tried uni and SMP with the special kernel and used the cpu cooling or throttling features eg setgethrtl and cpu1.4 etc. I am worried about damage to laptop if it is running very hot - sometimes up to 82 degrees. I know fan is not faulty as under linux it operates silently and keeps laptop very cool.

otherwise acpi works perfectly on this model - laptop suspends but unfortunately does not resume.

[pasha]

1. What is model of your notebook?

2. Do you use linux acpi extentions under Linux ?

[dpshea2415]

It is a Compaq C700 - model c768tu. It is intel chipset dual core.

Yes I use MEPIS linux - I am not sure what acpi version it uses it was installed by default.

Lately the laptop is running normal ie acpi thermal says 48 degrees celsius. The only thing i think may have made a difference is opening the apm power object and changing the settings on the performance tab - ie enabling power and performance optimization control.

I am still running this with uni kernel - i might try and see if it works also under smp.

[dpshea2415]

new version SMP kernel

[dpshea2415]

Under UNI kernel i can control temperature of cpu by executing thermal.exe from c:\ecs\bin directory - this seems to enable the fan to cool the laptop.

However with SMP the laptop runs hotter - around 55 degrees.

With SMP this laptop is less stable than with UNI kernel. Using /APIC and /CD the sound loops sometimes - I tried a number of different switches but nothing worked better. I now use /SMP /R = this seems more stable. Suspend works but resume does not - system comes back but no screen - ie stays black.

[pasha]

Please download experimental ACPI build from Mensys site:

• Experimental build for you:

ACPI-APIC-BAT.ZIP

• Read instructions: ​http://ecomstation.ru/projects/acpitools/?action=testcase

[dpshea2415]

This is the same laptop as ticket 353. the new build acpi-apci-bat does not make a difference as shown in update to ticket 353. When running uni kernel say with RC5 and 3.14 version of acpi.psd the laptop runs cool if you use setgetthrtl or the cpu.exe program from hobbes. thermal.exe also pickes up correct temperature etc. however when use smp kernel cpu runs hotter, thermal.exe does not report updated temperature after first boot and throttling cpu does not make a difference.

[Steven Levine]

Pasha says this system will work if you switch from the SMP kernel to a Uni kernel. He also says we could use ExtraHLP and that the FAQ dicusses both of these issues.

Please try a uni kernel and let us know if it changes the fan behavior.

[dpshea2415]

yes you are correct uni kernel fixes fan problem