Description of Problem: A kernel 2.4.9-21 on a machine with a builtin "Multimedia audio controller" from SiS (i810_audio module, 1039:7012 PCI id). Start playing bigger, say, wav file with 'play file.wav' and hit ctrl-C before it will finish. A machine is instantly power switch ready dead. If play is not interrupted then the machine survives.
should be fixed in 2.4.9-31