Testing on two older laptops:
- Compaq Presario A900 with Ubuntu 10.04 (2.6.32-24 kernel)
- Gateway ML6720 with Fedora 13
both freshly updated, I noticed both of them have the same problem:
- Nothing in /proc/acpi/fan
- In the only thermal zone,
cooling_mode polling_frequency state temperature trip_points
- cat /proc/acpi/thermal_zone/TZ01/* gives:
<setting not supported> <polling disabled> state: ok temperature: 55 C critical (S5): 100 C
or such under normal load (i.e. temperature is ~45-55*C under normal load, such as when browsing Web like now).
Obviously, there's no ACPI support for fan control.
sensors gives this:
acpitz-virtual-0 Adapter: Virtual device temp1: +55.0°C (crit = +100.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +49.0°C (high = +100.0°C, crit = +100.0°C) coretemp-isa-0001 Adapter: ISA adapter Core 1: +50.0°C (high = +100.0°C, crit = +100.0°C)
If you have or had any of the above models, did you have CPU overheating issues? For example, I can easily make CPU temperatures up to 85-90*C in a minute or two of hard work. This all with a fan underneath and another that helps the poor CPU fan.
I am also confused:
- Windows Vista doesn't have any issues like this. E.g. Flight Simulator brings it to ~65-70*C
- If there's no ACPI, I assume motherboard is controlling the CPU fan speed according to the current temperature. What's it doing letting it go to 80-90*C?
What temperatures are you experiencing during normal and hard CPU-bound tasks? I highly doubt it, but I have to check - maybe this is normal...
Lastly, I'm surprised I'm seeing this on much newer laptops (e.g. http://ubuntuforums.org/showthread.php?t=1327623) or even a mix of them (see e.g. bugs.launchpad.net/ubuntu/+source/linux/+bug/370173). Just wondering how people use Linux if so many people have issues on laptops...