I'm using Oprofile within a Linux embedde system. I noticed that when I configure my kernel with "Sample using TMU2 Timer" option, Oprofile is not generation sample files. The oprofile start and stop a profiling session normally but there is no samples files. 
When I recompile the kernel without this option (only activating Oprofile support) the problem is resolved.
It seems that is a bug but I don't know where to focus to fix the problem?

Any idea?
Best regargds