CPU Frequency off post-reboot: lscpu reporting something strange


New Member
Dec 11, 2022
I was trying to change my power methodology from performance to power save using some of the following commands:

@reboot echo "powersave" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
@reboot echo "performance" | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

I happened to reboot and see if things "stuck" (which they didn't because I'm still seeing Performance mode:


In any case after my reboot my `lscpu` information seems to be VERY wonky - luckily I happened to have it prior to my reboot - and now I'm seeing a huge discrepancy where it "appears" my cpu is being pinned to 800mhz


When I run dmidecode -t processor

root@proxmox:~# dmidecode -t processor
# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.

Handle 0x0010, DMI type 4, 48 bytes
Processor Information
    Socket Designation: U3E1
    Type: Central Processor
    Family: Core i5
    Manufacturer: Intel(R) Corporation
    ID: E9 06 09 00 FF FB EB BF
    Signature: Type 0, Family 6, Model 158, Stepping 9
        FPU (Floating-point unit on-chip)
        VME (Virtual mode extension)
        DE (Debugging extension)
        PSE (Page size extension)
        TSC (Time stamp counter)
        MSR (Model specific registers)
        PAE (Physical address extension)
        MCE (Machine check exception)
        CX8 (CMPXCHG8 instruction supported)
        APIC (On-chip APIC hardware supported)
        SEP (Fast system call)
        MTRR (Memory type range registers)
        PGE (Page global enable)
        MCA (Machine check architecture)
        CMOV (Conditional move instruction supported)
        PAT (Page attribute table)
        PSE-36 (36-bit page size extension)
        CLFSH (CLFLUSH instruction supported)
        DS (Debug store)
        ACPI (ACPI supported)
        MMX (MMX technology supported)
        FXSR (FXSAVE and FXSTOR instructions supported)
        SSE (Streaming SIMD extensions)
        SSE2 (Streaming SIMD extensions 2)
        SS (Self-snoop)
        HTT (Multi-threading)
        TM (Thermal monitor supported)
        PBE (Pending break enabled)
    Version: Intel(R) Core(TM) i5-7500T CPU @ 2.70GHz
    Voltage: 0.6 V
    External Clock: 100 MHz
    Max Speed: 4200 MHz
    Current Speed: 800 MHz
    Status: Populated, Enabled
    Upgrade: Other
    L1 Cache Handle: 0x000D
    L2 Cache Handle: 0x000E
    L3 Cache Handle: 0x000F
    Serial Number: To Be Filled By O.E.M.
    Asset Tag: To Be Filled By O.E.M.
    Part Number: To Be Filled By O.E.M.
    Core Count: 4
    Core Enabled: 4
    Thread Count: 4
        64-bit capable
        Execute Protection
        Enhanced Virtualization
        Power/Performance Control


I'd love to get my lscpu fixed - but if it doesn't actually matter performance wise - and just is a reporting issue - I can live with it. Does anybody else have ideas what to poke around at to try to get things back to the way they were?

Last edited:


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