Dear Maintainer, On my system (Asus N56VB with a i7-3630QM), the intel_pstate status is "passive" by default. This prevents thermald from being able to control the CPU frequency. Manually switching it to "active" makes it work. I address the problem locally, with a /etc/tmpfiles.d/pstate.conf file with the following content: w /sys/devices/system/cpu/intel_pstate/status - - - - active Then thermald works perfectly. I suppose the Debian package of thermald should provide a similar file. Cheers, -Paul