I believe this bug is a duplicate of Bug #524956. The upstream bug is https://bugzilla.kernel.org/show_bug.cgi?id=14667
As I noted in bug 524956, this regression effects more than just fans and temperature sensors. On my machine, it renders the Bluetooth and WiFi kill switches inoperable (resulting in the built-in bluetooth to be permanently off and WiFi to be permanently on). Also, the laptop lid state is not detected. ** Bug watch added: Linux Kernel Bug Tracker #14667 http://bugzilla.kernel.org/show_bug.cgi?id=14667 -- [Dell Studio 1537] temperature sensors and fan stop working following suspend/resume https://bugs.launchpad.net/bugs/526354 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs