baseline power consumtion kernel > 5.3.10

[Lucas Stach]

On Do, 2019-12-05 at 08:52 +0100, Guido Riedel wrote:
> Hi,
> 
> Since Kernel 5.3.11 I got a significant increased baseline Power 
> consumption. I tried up to 5.4.1 on arch linux. Powertop shows an 
> increase from 3.6W on 5.3.10 to 5.x W on higher Kernels. My laptop fan 
> spins a lot more.
> 
> I read that a lot of Intel stuff has entered the Kernel in 5.3.11, could 
> this cause it? Will it stay like this in the next Versions? Can I maybe 
> switch something off etc. to get a lower baseline power?
> 
> I hope I write to the right address, otherwise sorry.

7e34f4e4aad3 ("drm/i915/gen8+: Add RC6 CTX corruption WA"), which has
been backported to 5.3.11 causes a major power regression due to Intel
GPUs not being able to enter rc6 anymore.

Fixes for this are -next, but I don't know what the plans for landing
and maybe backporting are.

Regards,
Lucas