Comment 4 for bug 784216

I have this too.
And there is one more issue I'm not sure if they are connected, but when I'm powering down or try to restart my laptop sometimes it looks like shutting down normally, but then systems goes to black screen and stays like that. Not responding any commands and not doing anything. I've tried to wait but it can stay for hours like that.
All my logs with syslog are published in here: https://bugs.launchpad.net/ubuntu/+source/udev/+bug/794266