Same on HP Compaq nx6325 with AMD Turion(tm) 64 X2 Mobile Technology TL-52, including the fan running at full speed. But given the the thermal trip points, I think the CPU frequency scaling works as intended.
So it's essentially trying to keep the CPU from overheating.
Additionally, shutting down the laptop does not work, it gets the laptop to some weird power state where it looks like powered down but it won't boot after turning back on. Then I have to long-press the power button to shut down properly. Reboot just gets stuck. If I understand correctly, this is all related to ACPI, so I guess I should learn how to debug ACPI issues.
Same on HP Compaq nx6325 with AMD Turion(tm) 64 X2 Mobile Technology TL-52, including the fan running at full speed. But given the the thermal trip points, I think the CPU frequency scaling works as intended.
When idle, with the old kernel I see
$ uname -r virtual/ thermal/ thermal_ zone0/temp virtual/ thermal/ thermal_ zone0/trip_ point_* _temp
3.13.0-101-generic
$ cat /sys/devices/
42000
$ cat /sys/devices/
105000
95000
75000
65000
55000
40000
but with the new kernel it is
$ uname -r virtual/ thermal/ thermal_ zone0/temp virtual/ thermal/ thermal_ zone0/trip_ point_* _temp
4.4.0-47-generic
$ cat /sys/devices/
32000
$ cat /sys/devices/
105000
15900
15900
15900
15900
15900
So it's essentially trying to keep the CPU from overheating.
Additionally, shutting down the laptop does not work, it gets the laptop to some weird power state where it looks like powered down but it won't boot after turning back on. Then I have to long-press the power button to shut down properly. Reboot just gets stuck. If I understand correctly, this is all related to ACPI, so I guess I should learn how to debug ACPI issues.