I've been testing with Gutsy latest on these boards, and some moderately good news is that with 2.6.22-12-generic, it seems to take much longer for the machine to lockup. Using Feisty's 2.6.20 kernel, and the aforementioned iperf test, it would hang almost instantly. With Gutsy, it takes 30-60 minutes - but still hangs.
I've been testing with Gutsy latest on these boards, and some moderately good news is that with 2.6.22-12-generic, it seems to take much longer for the machine to lockup. Using Feisty's 2.6.20 kernel, and the aforementioned iperf test, it would hang almost instantly. With Gutsy, it takes 30-60 minutes - but still hangs.