nvvp hangs application on ubuntu 11.04


I am having an odd problem with nvvp (newest SDK, toolkit, drivers) when trying to analyze my program. Timeline generation etc works fine, but when it tries to run the program 21 times to generate metrics it just hangs at some point, cuda-gdb shows a mutex_lock in cudaLaunch. If I run the same program via:

while true; do ./random_walks ; done
on the console it works fine. Any hints for me? (Or other data you need)