AMD frequency sensitivity feedback powersave bias Legacy cpb sysfs knob support for AMD CPUs Processor family (Opteron/Athlon64/Hammer/K8) ->
KERNEL Kernel 4.11.0 or newer Processor type and features -> To install the Zen microcode, emerge sys-kernel/linux-firmware: "Cezanne" APU kernel 5.11 recommended, full support since 5.13 On same motherboard/keyboard but with Ryzen 5 - it worked fine. At this time it's not clear if problem is related to CPU or motherboard of keyboard or combination.
Once kernel started, keyboard can be connected as usual. Workaround - disconnect keyboard until kernel is loading.
Booting with keyboard that requires 2 USB connectors fails at GRUB time. Tested with latest 5.15.2 also without issues.įirmware Blob: amd-ucode/microcode_amd_fam17h.bin & linux-firmware-20211027Įarlier version of kernel were not tried(experimental kernel due to AMDGPU drivers are needed for newest AMD video card). System booted with 5.10.15 with minor issues, but would recommend 5.13+. In the output, one line should show "-march=znver n", where n ( 1, 2 or 3) is the Zen generation of the currently running system.įor stability use kernel parameters: processor.max_cstate=1 rcu_nocbs=0-11 idle=nomwaitįirmware Blob: amd-ucode/microcode_amd_fam19h.bin & linux-firmware-20220509
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