I can now confirm that Windows 7 is causing the problem. There are no problems after a cold boot into Ubuntu. After starting Windows 7 and then rebooting into Ubuntu, the problem occurs and apparently only a complete shutdown can fix it.
** Summary changed: - Network connection keeps dropping + Windows 7 causes network problems for Ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/847428 Title: Windows 7 causes network problems for Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/847428/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs