[pimeys]

Seems to work for me at least:

  > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
  amd-pstate

And, it has a tremendous effect on battery life and the fan speed on the G3. Maybe it doesn't work with previous models?

[dvd23]

As the parent said, apparently AMD recommended not to enable it for that generation [1]. That's the price to pay for having a first gen I suppose...

[1] https://forums.lenovo.com/t5/Other-Linux-Discussions/amd-pst...