Arch Linux

darkrocket

Member

Registered: 2019-06-13

Posts: 10

[Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0)

Hello, new Ryzen 3 1200 machine and i'm getting this warning in the journal:

kernel: [Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0)

¿Is this expected or should I be worried?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,376

Re: [Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0)

Ensure the microcode is applied and set up: https://wiki.archlinux.org/index.php/Microcode and/or update your BIOS/UEFI and check whether it's still there.

darkrocket

Member

Registered: 2019-06-13

Posts: 10

Re: [Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0)

Ensure the microcode is applied and set up: https://wiki.archlinux.org/index.php/Microcode and/or update your BIOS/UEFI and check whether it's still there.

Hello, I installed the amd-ucode package when I installed Arch and regenerated the GRUB config after that. I also updated the motherboard BIOS.

Edit: dmesg | grep microcode gives me this output:

[    0.681772] microcode: CPU0: patch_level=0x08001138
[    0.681779] microcode: CPU1: patch_level=0x08001138
[    0.681783] microcode: CPU2: patch_level=0x08001138
[    0.681787] microcode: CPU3: patch_level=0x08001138
[    0.681817] microcode: Microcode Update Driver: v2.2.

Last edited by darkrocket (2020-01-17 16:15:27)

darkrocket

Member

Registered: 2019-06-13

Posts: 10

Re: [Firmware Bug]: ACPI MWAIT C-state 0x0 not supported by HW (0x0)

I "solved" it by disabling the C-state option in the BIOS.