Created attachment 142423 [details]
dmesg output

With Gentoo's 4.19.0 and 4.19.1 kernels, powerplay does not seem to be working
on my Radeon R9 380X card: 3D applications run noticeably slower than before
(but otherwise work fine) and there a number of errors in dmesg during startup
and when trying to switch dpm states via sysfs.

Everything works fine with 4.18.17-gentoo.