Need help with pstate changing

[Алексей Губский <a.gubskiy@xxxxxxxxx>]

Greetings!

I have very old notebook with 8400M Gs.

I'm experience some overheating on high clocks. I want to change pstate for AC mode.

Currently I have

sudo cat /sys/kernel/debug/dri/0/pstate

20: core 169 MHz shader 338 MHz memory 100 MHz

21: core 275 MHz shader 550 MHz memory 200 MHz

22: core 400 MHz shader 800 MHz memory 400 MHz

AC: core 275 MHz shader 550 MHz memory 199 MHz

And I want to set AC to 20 instead of 21.

Could you please give me some advise how can I do this?

I'm running lubuntu 18.04

uname -a

Linux tashpc 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Thanks!

--

С уважением,
Губский Алексей.

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