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I noticed it first on a 6.14 kernel. Maybe it came earlier...
My system:
ASUS PRIME X370-PRO mainboard (~2017)
AMD Ryzen 7 3800XT (Zen 2, ~2020)
What I get on boot-up is the following message, repeated 16 times (8 real CPU cores with hyper-threading equals 16 threads):
amd_pstate: Boost mode is not supported by this processor or SBIOSIt may be that this was added to the Linux kernel in 2021, by this commit: https://lkml.iu.edu/hypermail/linux/ker … 03193.html
The strange thing is: I've never noticed this message before...
Anyway, when I run "cpupower frequency-info", according to https://www.kernel.org/doc/html/v6.14/a … state.html, I get this:
# cpupower frequency-info
analyzing CPU 0:
driver: amd-pstate-epp
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
energy performance preference: balance_performance
hardware limits: 550 MHz - 5.09 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 1.87 GHz and 5.09 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: 4.20 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
amd-pstate limits:
Highest Performance: 166. Maximum Frequency: 5.09 GHz.
Nominal Performance: 137. Nominal Frequency: 4.20 GHz.
Lowest Non-linear Performance: 61. Lowest Non-linear Frequency: 1.87 GHz.
Lowest Performance: 20. Lowest Frequency: 550 MHz.
Preferred Core Support: 1. Preferred Core Ranking: 196.Note that cpupower outputs "boost state support" with a "yes" as both supported and active. And, ah, yes, I did overclock the CPU in the UEFI settings from 3.9 to 4.2 GHz nominal frequency (where it rarely is for longer periods anyway). The 3800 XT supports a boost frequency of 4.7 GHz, and it has a free multiplier (so it is designed to be overclocked by the end-user).
Is this just my UEFI BIOS or do others see such a strange message as well? Also, I don't see (or rather: feel) any impact, so I'm guessing that amd_pstate does its job right.
Thanks in advance.
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UEFI update often helps with amd_pstate problems.
On the other hand if you don't feel any impact why bother?
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Hey, I get that message at boot too. I think it’s because I turned off the boost on my AMD 5600G in the BIOS to save some power. Is there a way to get rid of it? Kinda looks ugly.
$ cpupower frequency-info
analyzing CPU 0:
driver: amd-pstate-epp
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
energy performance preference: balance_performance
hardware limits: 400 MHz - 4.47 GHz
available cpufreq governors: performance powersave
current policy: frequency should be within 2.37 GHz and 4.47 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency: 3.08 GHz (asserted by call to kernel)
boost state support:
Supported: yes
Active: yes
amd-pstate limits:
Highest Performance: 166. Maximum Frequency: 4.47 GHz.
Nominal Performance: 145. Nominal Frequency: 3.90 GHz.
Lowest Non-linear Performance: 88. Lowest Non-linear Frequency: 2.37 GHz.
Lowest Performance: 15. Lowest Frequency: 400 MHz.
Preferred Core Support: 1. Preferred Core Ranking: 181.Last edited by quellen (2025-05-02 10:50:14)
sorry for my bad english
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I think I solved it by adding the "amd_pstate=disable" parameter to grub
sorry for my bad english
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