Comment 7 for bug 1851222

I've push another change to autotest for ftrace, this uses 1 second timeout polls on the tracing output and more debug output so if anything locks up we *should* get a better idea of where and why it is hanging.

https://kernel.ubuntu.com/git/ubuntu/autotest-client-tests.git/commit/?id=b211b55fe30f5b16730cd61229096e1fa125e869

Do you mind re-testing?