Some AMD GPUs Affected By A Nasty Power Regression That Snuck Into Linux 4.18 Stable

[tuxd3v]

To set pp_power_profile_mode, power_dpm_force_performance_level needs to be set to manual first.

Didn't seem to make much different though.

You Right, it didn't infact..
I get ~32 watts in power saving mode..
The last card I tested was a Sapphire Nitro+ 4GB,
Can your tell us, what is your card brand - model?

It could be related..because @torsionbar28 has normal power comsumption values..

[brrrrttttt]

GPU-Z in Windows reports about 35 W.

[geearf]

Is there a good reason why AMD does not have such thourough internal testing for AMDGPU like Intel or Nvidia has? Are they about to fix this with more funds at hand from their increased CPU sales?!

Yeah I don't get it either, for such recent and common cards it should be caught during QA.

[nuetzel]

You Right, it didn't infact..
I get ~32 watts in power saving mode..
The last card I tested was a Sapphire Nitro+ 4GB,
Can your tell us, what is your card brand - model?

It could be related..because @torsionbar28 has normal power comsumption values..

torsionbar28 has a _RX560_ - NOT RX480/580 !!!

But AMD's Alex Deucher is lokking @ it: =>

https://bugzilla.kernel.org/show_bug.cgi?id=201275

[tuxd3v]

GPU-Z in Windows reports about 35 W.

I think that GPU-Z, has a stress performance mode, is that activated?
At least the Linux version has, I tested it on a NV1080, and I noticed fans to do a lot of noise.

I don't now if the windows version is equal,( I don't use another OS, than linux).

But yeah, 35 is a lot better than ~60W anyway

[tuxd3v]

torsionbar28 has a _RX560_ - NOT RX480/580 !!!

But AMD's Alex Deucher is lokking @ it: =>

https://bugzilla.kernel.org/show_bug.cgi?id=201275

Ho, I forgot that,
thanks for the clarification

[tuxd3v]

For what I see, the Bug also afects RX560, but in less extent...
Their are complains about power jumped from 7 -> 13 watts on Rx560...

[nuetzel]

For what I see, the Bug also afects RX560, but in less extent...
Their are complains about power jumped from 7 -> 13 watts on Rx560...

Yes.
In 'both' cases nearly doubled!!! ;-(
Even temperature went up...
But 'only' RX460/470/560/570 can go down to ~7 watts.
Zero core isn't running with Linux currently if I remember right.

[tuxd3v]

(...)
But 'only' RX460/470/560/570 can go down to ~7 watts.
Zero core isn't running with Linux currently if I remember right.

I had misunderstood he was in a Rx560, and I tough that my rx580 could have some problem, but then @brrrrttttt reported 35 in Windows..
anyway, thanks for the clarification

[wizard69]

Interesting. I have to wonder if this impacts laptop chipset implementation. I have this feeling that the latest Fedora Kernels have shortened my battery life. The problem is no objective testing so maybe it is me.