On RHEL4 from the 2.0 GUI, "Basic Statistical Callgraph" works fine, but provides limited diagnostic information. But "Basic Sampling" and "Basic Data Profiling" fail with the following messages in the Console:
Duration (sec): 0
Failed to perform sampling collection!
Custom configurations with Event-based sampling fail in the same manner.
Please help a new user get started. I assume event-based sampling is supported on Linux...?