Note that any solution that prevents the kernel from executing the MWAIT instruction will not prevent the issue from occurring 100% of the time, as other code could execute the instruction. Adding the kernel boot parameter idle=nomwait.Oct 31 11:46:23 fire kernel: : cache level: RESV, tx: GEN, mem-tx: GEN Oct 31 11:46:23 fire kernel: : Execution Unit Error: Watchdog timeout error.
Oct 31 11:46:23 fire kernel: : Execution Unit Extended Error Code: 0 Oct 31 11:46:23 fire kernel: : System Fatal error. Likely due to errata 1109 a Ryzen system may encounter random, spontaneous reboots with MCE hardware errors being logged on startup. ASUS and ASRock have been known to push very beta BIOS/UEFI versions that have shown to be quite unstable.
config file and built into the kernel binary. Alternatively, when booting via EFI stub, parameters set within the kernel's. This is generally performed with secondary bootloaders such as GRUB or systemd-boot. Then pass the following kernel commandline parameter at boot time rcu_nocbs=0-15. Offload RCU callback processing from boot-selected CPUs Make expert-level adjustments to RCU configuration KERNEL Enable CONFIG_RCU_EXPERT, CONFIG_RCU_NOCB_CPU General setup -> in notebooks or Chromebooks), add additionally: (/lib/firmware) Firware blobs root directoryįor Zen 3 (or newer) APUs (e.g. (amd-ucode/microcode_amd_fam17h.bin) External firmware blobs to build into the kernel binary 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+.