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SubjectTracing of power:power_start events doesn't work

i use kernel version (x86-64, Core 2 Duo) and the perf events
to track frequency and c states of my cpu. But if i want to trace
power:power_start events, it does not work. After typing

echo "power:power_start" | sudo tee set_event

on the console, the trace doesn't contain such events.
power:power_frequency and power:power_end events are reported correctly
by the system. I read in the mailing list that Robert Schoene had a
similiar problem, but with power:power_end events. Is there a known bug
regarding to trace_power_start methods in process.c?

Bye Ronny

Ronny Tschueter

Technische Universität Dresden
Center for Information Services
and High Performance Computing (ZIH)
D-01062 Dresden

Office: Willersbau, room A31
Phone: (+49) 351/463-35448

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