To follow up: using the Intel PCIe NIC instantly solved all my problems. No more lockups under combined network and PCI load. I won't be going back to Realtek NICs ever. (If someone can point to a specific purported bugfix that's in some kernel I can simply download and install without building my own kernel, I can try this on my hardware to test the bugfix, but I'm not going to bother for the case of, "It's a random new kernel but nobody's specifically addressed this bug, but test it anyway.") I'm currently running Natty as of 4/8, which is using 2.6.38-8 under AMD64 desktop on a 6-core CPU.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/746914 Title: MSI 785GT with Realtek RTL8111/8168B locks up only with heavy gigabit traffic -and- heavy PCI load (10.10 at least) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs