$ dmesg | grep powernow
[   37.901614] powernow-k8: Found 1 AMD Athlon(tm) 64 Processor 3000+ processors (version 2.00.00)
[   37.901652] powernow-k8:    0 : fid 0xc (2000 MHz), vid 0x2
[   37.901654] powernow-k8:    1 : fid 0xa (1800 MHz), vid 0x6
[   37.901657] powernow-k8:    2 : fid 0x2 (1000 MHz), vid 0x12
[   43.554775] powernow-k8: Hardware error - pending bit very stuck - no further pstate changes possible
[   43.554783] powernow-k8: transition frequency failed
[   44.795913] powernow-k8: failing targ, change pending bit set
[   45.927761] powernow-k8: error - out of sync, fix 0xc 0xa, vid 0x2 0x2