Comment 146 for bug 147464

I have had this same issue since 7.10, currently on 8.04 and after almost a year finally figured out that it always seems to hard lock when I've got a ton of torrent activity. The up/down speed it locks on is always different, so I'm thinking it has to do with the number of connections present at the time and not the about of bandwidth being used.

To be sure I have tested every piece of hardware, replacing my NIC (no effect, except I upgraded so now I get even better speeds) and replaced my PSU due to a slight fluctuation in one of the 5v rails (within limits, but barely) which also had no effect. CPU, heat, RAM, HDs, etc all tested fine. So this is definitely a Linux/Ubuntu issue.

My issues are exactly as above, seemingly random hard locks requiring the use of the reset/power button. I cannot confirm cases of num lock/caps lock/etc lights blinking as my wireless keyboard doesn't have those lights.

Please fix this issue, it should be of a relatively high priority due to the nature of the issue and the possible public (read non-Linux users whom wish to try Ubuntu) assumptions that Ubuntu is not a stable OS. I personally have fiber at home, and up until now (when I realized where the issue is) I would happily leave any and all torrents running until these was not a single peer left, having a constant 3-5Mbps (and higher) upload going. I've tried other torrent clients (I prefer Azureus) with the same resulting hard locks.