I believe I found a solution to this problem: You must fully power OFF your computer to clear this error state. Reboot/restart and sleep are NOT sufficient.
I was able to get my Ethernet port working normally again by shutting down, unplugging AC adapter, and removing battery for a minute. When I brought the machine back up after this Ethernet port was working normally again and has been for some time now. Before hitting upon this solution I was able to guess that this was some kind of hardware bug because my Ethernet port still didn't work even if I rebooted into Windows Vista (i.e. it was specific to Ubuntu or Linux). I suspect that all the people above who reported switching to a different kernel solving their problem may have done a shutdown and that is what "fixed" their issue rather than the different kernel itself. Hope this helps anyone else coming here with the same problem. -- High CPU on events/0 or 1 and on board networkcard non functional https://bugs.launchpad.net/bugs/619343 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