I basically have the same problem. After upgrading from 12.04 to 12.10 the fan of my laptop is running nearly always. In 12.04 the fan wasn't running most time. CPU temperature is fine:
> sensors coretemp-isa-0000 Adapter: ISA adapter Core 0: +54.0°C (high = +80.0°C, crit = +90.0°C) Core 2: +51.0°C (high = +80.0°C, crit = +90.0°C) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lm-sensors in Ubuntu. https://bugs.launchpad.net/bugs/1078922 Title: Fan runs unnecessary To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lm-sensors/+bug/1078922/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs