[coreboot] Neither seaBIOS or GRUB payloads are able to boot gentoo [amd_pmu_init performance counters freeze] [KGPE-D16]

[Taiidan at gmx.com]

I have tried booting with multiple gentoo kernels but every time it 
either hangs on amd_pmu_init ("amd performance counters") with a stack 
trace or simply black screens and reboots quickly.

Other distros (fedora, opensuse) work fine.

I have tried coreboot 4.5 and the git version but neither work.

I would post this on the gentoo forum but it seems like a coreboot 
problem instead as the same kernels work fine on other machines.

Any ideas? This happens with both the LiveCD/USB kernel (-nofb doesn't 
change anything either) and the deblobbed hardened kernel.


+ (if anyone knows) How come I have to run fancontrol/pwmconfig to get 
the fans to slow down? The proprietary bios had the same issue until I 
found an option for "whisper" fan control mode.