Unable to do reclocking manually

Submitted by Maxime

Assigned to Nouveau Project

Link to original bug (#104784)

Description

Hi,

I have a laptop with Optimus technology, my Nvidia card is a GTX 640MX. I use Debian Unstable x86_64 with nouveau 1.0.15 and Mesa 17.3.3

Unfortunatly, it's impossible to do reclocking with Nouveau and my GPU.

When i launch "cat /sys/kernel/debug/dri/1/pstate", i have these results :
07: core 270-405 MHz memory 648 MHz
0a: core 270-601 MHz memory 1600 MHz
0f: core 270-614 MHz memory 2800 MHz
AC: core 0 MHz memory 0 MHz

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It's anormal to have these line "AC: core 0 MHz memory 0 MHz", right ?
Because when i set "echo 0f > /sys/kernel/debug/dri/1/pstate", the console (not the system) hangs. And when i launch a game (Tyranny), it does not work.