No amdtemp sysctls, acpi errors, AMD Ryzen 5 2400G

Greetings,

I'm trying to track down a couple of things.  amdtemp doesn't
report any temperature sensors, and acpi seems to have some
errors.  Not sure if they are related.

These are the ACPI-related warnings and errors during boot.

    Firmware Warning (ACPI): Optional FADT field Pm2ControlBlock has valid Length but zero Address: 0x0000000000000000/0x1 (20181031/tbfadt-796)

    acpi0: <ALASKA A M I > on motherboard
    Firmware Error (ACPI): Failure creating [\134_SB.SMIC], AE_ALREADY_EXISTS (20181031/dswload2-477)
    ACPI Error: AE_ALREADY_EXISTS, During name lookup/catalog (20181031/psobject-372)
    Firmware Error (ACPI): Failure creating [\134_SB.SMIB], AE_ALREADY_EXISTS (20181031/dsfield-803)

The amdtemp module loads fine (including the dependent amdsmn), but
doesn't report any temperature related sysctls.

    $ sysctl -a | grep temp
    cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
    cd0: Attempt to query device size failed: NOT READY, Medium not present- tray closed
    net.inet6.ip6.use_tempaddr: 0
    net.inet6.ip6.temppltime: 86400
    net.inet6.ip6.tempvltime: 604800
    net.inet6.ip6.prefer_tempaddr: 0
    hw.usb.template: -1
    kstat.zfs.misc.arcstats.arc_tempreserve: 0
    kstat.zfs.misc.zcompstats.attempts: 135280

Here's the relevent CPU line from dmesg.

    CPU: AMD Ryzen 5 2400G with Radeon Vega Graphics     (3593.34-MHz K8-class CPU)
      Origin="AuthenticAMD"  Id=0x810f10  Family=0x17  Model=0x11  Stepping=0
      Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
      Features2=0x7ed8320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
      AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM>
      AMD Features2=0x35c233ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,SKINIT,WDT,TCE,Topology,PCXC,PNXC,DBE,PL2I,MWAITX>
      Structured Extended Features=0x209c01a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA>
      XSAVE Features=0xf<XSAVEOPT,XSAVEC,XINUSE,XSAVES>
      AMD Extended Feature Extensions ID EBX=0x1007<CLZERO,IRPerf,XSaveErPtr>
      SVM: (disabled in BIOS) NP,NRIP,VClean,AFlush,DAssist,NAsids=32768
      TSC: P-state invariant, performance statistics

The full dmesg, /usr/sbin/acpidump -dt, and apcica-tools acpudumps
(with and without -s) are here:

    https://people.freebsd.org/~deischen/2400g/dmesg.txt
    https://people.freebsd.org/~deischen/2400g/acpidump.txt
    https://people.freebsd.org/~deischen/2400g/acpica.acpidump.txt

Thanks

-- 
DE