On Thu, 2008-04-10 at 03:40 +0800, Jean Delvare wrote: > Hi Rui, > > I am testing your generic thermal zone driver on my old Sony laptop > (Vaio PCG-GR214EP) and I have noticed that the temperature reported by > the generic thermal zone interface > (/sys/class/thermal/thermal_zone0/temp) isn't updated. The reported > value is always the same, until I read > from /proc/acpi/thermal_zone/ATF0/temperature. After that the value > in /sys/class/thermal/thermal_zone0/temp matches the one reported > in /proc/acpi/thermal_zone/ATF0/temperature, but doesn't change again > until the next access to /proc/acpi/thermal_zone/ATF0/temperature. > > This is with polling disabled on the ACPI thermal zone (the default on > my system). If I set polling to 2 seconds, then reading > from /sys/class/thermal/thermal_zone0/temp shows changing values as > expected. > > So it seems to me that reading > from /proc/acpi/thermal_zone/ATF0/temperature updates the temperature > value when polling is disabled, while reading > from /sys/class/thermal/thermal_zone0/temp only returns a cached > value. > Is it correct? I think that the generic thermal driver should be fixed > to update the temperature values properly. Yes, you're right. A fix will be send out together with the refreshed generic thermal hwmon conversion patches. ;) thanks, rui > > Thanks, > -- > Jean Delvare > >
