There are much the same error messages (20+ per second!) in my syslog:
Jul 14 22:17:17 laptop-joost kernel: [ 5074.090203] ehci-pci 0000:00:1d.0: port 1 resume error -19
What does this message mean, and how do I solve this? The system hangs during shut down when this messages apear.
I am using Ubuntu 14.04 (Gnome classic) on an Acer C720 Chromebook (Chrubuntu).