Few days ago I updated my openSUSE 12.3 system from Kernel 3.9.8-1.gf3348a8-desktop to 3.10.0-1.g3dcd746-desktop and since then, turbo mode of my i7 3520M is enabled by default and it does not throttle down when idle. It is constantly running at 3.6GHz.
intel_pstate module is enabled by default, thus any userspace settings are ignored (as intended). Tools such as cpufreq or cpupower are not installed any more on my machine.
Booting the 3.9.8 Kernel still shows its old behaviour, that the CPU is throttling as expected.
In addition, adding
intel_pstate=disable to the kernel command line deactivates the intel_pstate module resulting in the desired behaviour of a throttling CPU.
Another point of minor interest is, that I'm not able to trigger the turbo mode of my CPU if it is throttling (i.e. Kernel 3.9.8 or disabled intel_pstate).
Any help is appreciated.