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x670e PG Lightning no menu, CPPC option on BIOS
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M440 View Drop Down
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Points: 3115 		Post Options Post Options   Thanks (0) Thanks(0)   Quote M440 Quote  Post ReplyReply Direct Link To This Post Topic: x670e PG Lightning no menu, CPPC option on BIOS
    Posted: 21 Jun 2024 at 11:49am
https://docs.kernel.org/admin-guide/acpi/cppc_sysfs.html

looks like in Arch the registers are exposed, so its working out of the box?



mm@desktop ~
>cct /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate-epp

mm@desktop ~
>cct /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-linux-zen root=UUID=d0a74239-3d26-448f-b874-c6a286607166 rw loglevel=3 nvidia_drm.modeset=1 nvidia_drm.fbdev=1 nvidia.NVreg_PreserveVideoMemoryAllocations=1 module_blacklist=nouveau amd_iommu=on iommu=pt vfio-pci.ids=1002:164e,1002:1640 default_hugepagesz=1G hugepagesz=1G hugepages=X

mm@desktop ~
>ll /sys/devices/system/cpu/cpu0/acpi_cppc/
drwxr-xr-x root root   0 B  Fri Jun 21 05:33:30 2024 ??.
drwxr-xr-x root root   0 B  Fri Jun 21 05:33:23 2024 ??..
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??feedback_ctrs
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??highest_perf
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??lowest_freq
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??lowest_nonlinear_perf
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??lowest_perf
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??nominal_freq
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??nominal_perf
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??reference_perf
.r--r--r-- root root 4.0 KB Fri Jun 21 05:34:18 2024 ??wraparound_time

mm@desktop ~
>cct /sys/devices/system/cpu/cpu0/acpi_cppc/nominal_freq
4501

mm@desktop ~
>inxi -xxxF
System:
  Host: desktop Kernel: 6.9.5-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc
    v: 14.1.1 clocksource: tsc
  Desktop: KDE Plasma v: 6.1.0 tk: Qt v: N/A wm: kwin_wayland vt: 1 dm:
    1: LightDM v: 1.32.0 note: stopped 2: SDDM Distro: Arch Linux
Machine:
  Type: Desktop Mobo: ASRock model: B650M-HDV/M.2 serial: <superuser required>
    uuid: <superuser required> UEFI: American Megatrends LLC. v: 3.01
    date: 05/10/2024
CPU:
  Info: 8-core model: AMD Ryzen 7 7700X bits: 64 type: MT MCP smt: enabled
    arch: Zen 4 rev: 2 cache: L1: 512 KiB L2: 8 MiB L3: 32 MiB
  Speed (MHz): avg: 1473 high: 5333 min/max: 545/5573 cores: 1: 545 2: 5333
    3: 545 4: 545 5: 4419 6: 3578 7: 545 8: 3701 9: 545 10: 545 11: 545 12: 545
    13: 545 14: 545 15: 545 16: 545 bogomips: 143721
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm



Edited by M440 - 21 Jun 2024 at 11:51am
asrock b650m/hdv.m2, ryzen 7700x@85watt
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artemklevtsov View Drop Down
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Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote artemklevtsov Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2024 at 1:47pm
I have ASRock X670E Steel Legend with AMD Ryzen 7900X. I also can't find CPPC option. But amd_pstate works out of the box for me.

??cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver  
amd-pstate-epp
??cat /proc/cmdline
idle=nomwait processor.max_cstate=5 mdgpu.mcbp=0 amdgpu.ppfeaturemask=0xffffffff root=UUID=a090f7ee-aec4-46df-819a-8bcc28538cd6 rw rootflags=subvol=/@
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gigascake View Drop Down
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Points: 20 		Post Options Post Options   Thanks (0) Thanks(0)   Quote gigascake Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2024 at 3:20pm
AMD CPU is not powerful in LINUX on Aslock x670e PG Lightning mainboard.

I tried installing all stable versions of the bios, but the 'CPPC' option didn't exist. Because of this, my '7950x' cpu only works with the default clock on Linux. I want to use the 'amd_pstate' cpu power management module, but I can't use this power management module because I can't enable the 'CPPC' option. This board has been released for a long time, but I think support from amd cpu is insufficient
Albatros
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