That message seems to be printed unconditionally as we forgot to check the actual return value here: https://svnweb.freebsd.org/base/head/sys/x86/cpufreq/hwpstate_intel.c?revision=358333&view=markup#l463 Just for the record, relevant dmesg entries: CPU: Intel(R) Core(TM) i9-10900X CPU @ 3.70GHz (3700.00-MHz K8-class CPU) Origin="GenuineIntel" Id=0x50657 Family=0x6 Model=0x55 Stepping=7 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=0x7ffefbbf<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE ,OSXSAVE,AVX,F16C,RDRAND> AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM> AMD Features2=0x121<LAHF,ABM,Prefetch> Structured Extended Features=0xd39ffffb<FSGSBASE,TSCADJ,BMI1,HLE,AVX2,FDPEXC,SMEP,BMI2,ERMS,INVPCID,RTM,PQM,NFPUSG,MPX,PQE,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,C LFLUSHOPT,CLWB,PROCTRACE,AVX512CD,AVX512BW,AVX512VL> Structured Extended Features2=0x800<AVX512VNNI> Structured Extended Features3=0xbc000400<MD_CLEAR,IBPB,STIBP,L1DFL,ARCH_CAP,SSBD> XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES> IA32_ARCH_CAPS=0xab<RDCL_NO,IBRS_ALL,SKIP_L1DFL_VME,MDS_NO,TSX_CTRL> VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr TSC: P-state invariant, performance statistics ... hwpstate_intel0: <Intel Speed Shift> numa-domain 0 on cpu0 hwpstate_intel0: Failed to set autonomous HWP for package (repeating for every hardware thread)
A commit references this bug: Author: yuripv Date: Sun Nov 29 01:43:05 UTC 2020 New revision: 368140 URL: https://svnweb.freebsd.org/changeset/base/368140 Log: hwpstate_intel: don't unconditionally print the error message Actually check the wrmsr_safe() return value when setting autonomous HWP for package. PR: 245582 Differential Revision: https://reviews.freebsd.org/D24744 Changes: head/sys/x86/cpufreq/hwpstate_intel.c