Tldr; Have tested multiple different Ryzen 7000 configurations on various kernels, and the power draw just seems really bad.
Been looking for a decent new laptop workstation that fits various tasks. Phoenix chips check a lot of the boxes that I want, but the power draw on Linux for these chips seems a bit…crazy.
The product docs say these chips are 35W-45W, but I figured that was just the range of maximums. What I’m seeing on fresh installs of various Debian variants is a CONSTANT power draw of at least 35W on the low end at all times. I’ve stepped kernel point releases from 6.0 to 6.6 to test out, and the later versions are definitely better at using a bit less power thanks to the amd_pstate_epp being included directly in the kernel, but this power draw is still there for the CPU package on idle.
A few different laptop models I’ve tested will only get 90 mins on battery because of this. I’ve now tried four different models from three different manufacturers, and all show the same type of power draw.
Is this just a “thing” with these chips? I understand they were modified from desktop to be a more mobile platform, but this is just terrible from an end-user perspective. I want the CPU and iGPU, and hell, even the FPGA XDNA thingie, but not when the machine can’t run off of AC.
Interesting. Haven’t heard that before. I wonder when that was decided, because the last few TLP releases seem to have all the proper postage settings for the Zen4 chips, but those aren’t included with stock Ubuntu, just from PPA/GitHub. Will give it a try and see if anything changes.