(In reply to Roy from comment #1)
> To debug this, I'd like you to attach to this bug report:
> - A better description of what you're trying to do. I suspect you're trying
> to set a pstate, but please be clear about the steps that you follow to get
> the result you claim to get.
> - A copy of your video BIOS (/sys/kernel/debug/dri/<number>/vbios.rom
> - A peek of the strap register (nvapeek 0x101000)
> - A full unfiltered dmesg from kernel 4.17 after failure like you did for
> the 3.19 kernel, preferably booted with the nouveau.debug="PMU=debug"
> parameter.
> 
> (In reply to atirage21 from comment #0)
> > Maybe it is connected on your changes from 2016:
> > https://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/
> > ?id=a24ded627e42d453546c553d609edc073f59cd57
> 
> This patch... no, this whole repository is unrelated to your problems.

nvapeek 0x101000
00101000: df40ac9a