I can confirm that blacklisting module r8187 fixes the error of the NetworkManager.
I rebooted, after adding r8187 to the blacklist, and installed network- manager(-gnome) and now I don't see any error and my system stays up as normal. Of course I haven't got wireless now, but I didn't use if anyway on my desktop, so for me that isn't a very big problem for now. -- (Feisty) NetworkManager makes system unusable, seems to have problem with dbus https://launchpad.net/bugs/83013 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs