Comment 349 for bug 370173

I am also suspected a fan control problem because when CPU is being used at full speed, fan just go for a little burst but could do it longer in order to cool a bit more.

For me the directory /proc/acpi/fan is empty and /proc/acpi/thermal_zone/*/trip_points has no active trip points (those starting with "AC") then there is no ACPI-based fan control on my system (https://wiki.ubuntu.com/DebuggingACPI). Then I am wondering, if not ACPI, what is governing fan management ?

Can those that are concerned by this bug confirm or not if they have a ACPI-based fan control on their system ?