amdgpu: Manual Card Configuration Change

[Alex Deucher]

On Mon, Oct 19, 2020 at 8:53 PM Josh Fuhs <Joshua.Fuhs at pm.me> wrote:
>
> Thanks. I tried 5.9.1 and I think there's still a problem, or at least something different.
>
> Using the same configuration script, I noticed that my cards are running a lot hotter. For example, here's total power consumption of a two-card system with two different kernels:
>
>     5.8.14: 460W
>     5.9.1:  560+W
>
> Memory and system clocks are initially set the same on all cards in all cases.

Can you bisect?

Alex


>
> Josh
>
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Monday, October 19, 2020 2:22 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>
> > On Sun, Oct 18, 2020 at 4:32 PM Josh Fuhs Joshua.Fuhs at pm.me wrote:
> >
> > > Hello all,
> > > Regarding amdgpu, I've been using some Radeon 5700XTs for compute work with kernels through 5.8.14. I recently tried kernel 5.9.0, and found that the following is no longer allowed:
> > > echo "m 1 200" | sudo tee /sys/class/drm/card0/device/pp_od_clk_voltage
> > > Is this an expected change? If so, where should I look for documentation regarding how to manually configure these cards with this kernel. Note, I've had this working with 5.8 kernels for months.
> >
> > It was a bug. Fixed in 5.9.1.
> >
> > Alex
>
>