kernel errors : AE_NOT_FOUND

[Eric Marquez]

I recently notice these errors in my dmesg.  Can somebody help explain 
this to me.  Do I need to worry about this?

Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: AMD-K6(tm) 3D+ Processor (400.91-MHz 586-class CPU)
  Origin = "AuthenticAMD"  Id = 0x591  Stepping = 1
  Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX>
  AMD Features=0x80000800<SYSCALL,3DNow!>
real memory  = 268419072 (255 MB)
avail memory = 253014016 (241 MB)
K6-family MTRR support enabled (2 registers)
    ACPI-0277: *** Warning: Invalid checksum in table [DSDT] (23, sum fc 
is not zero)
    ACPI-0452: *** Error: Looking up [PIRQ] in namespace, AE_NOT_FOUND
    ACPI-1303: *** Error: [NULL NAME], AE_NOT_FOUND
    ACPI-0204: *** Error: AcpiLoadTables: Could not load namespace: 
AE_NOT_FOUND
    ACPI-0213: *** Error: AcpiLoadTables: Could not load tables: 
AE_NOT_FOUND
ACPI: table load failed: AE_NOT_FOUND

--ebm