mclk stuck at low state

Tom Psyborg pozega.tomislav at gmail.com
Wed Jan 13 09:05:42 UTC 2021


Hi

I see the message didn't make it to the mailing list? Any reason for that?

On 10/01/2021, Tom Psyborg <pozega.tomislav at gmail.com> wrote:
> Hi
>
> Have an ubuntu 16.04 system here with kernel version 5.6.14, running
> on a laptop with FX9830P APU.
> During graphic load I notice the memory clock is always at the low
> state - 667MHz, never switching to 1200MHz. These two states are the
> only ones listed in pp_dpm_mclk output.
> I checked system memory with dmidecode, it is reported as 2400MHz.
> Same bug is still present with live booted ubuntu 20.10
>
> Does this introduce any regression in performance, or is just a
> cosmetic bug and actual mclk is the same as system memory clock?
>


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