Similar problems with lucid with backported maveric kernel. Network started to disappear when i replaced faulty harddisk and enabled cool'n'quet and powernowd. I'm testing now if disabling powersaving helps with this problem.
** Attachment added: "crash.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/472057/+attachment/1727342/+files/crash.txt -- NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out https://bugs.launchpad.net/bugs/472057 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs