I have a thinkpad X21 and when I switched to powersaved and lm-sensors it seems like my fan is constantly running and my fan speed no longer detects. It just says 0 in /proc/acpi/ibm/fan. Fan control also seems limited to 0-7, I can't set it to auto or else it disables the fan. Any idea on what could have happened or how I can try to find out. I don't see anything in the dmesg log.