I had the same problem. xhci_hcd 0000:09:00.0: ERROR no room on ep ring filling up syslog and kern.log
But mine was not related to USB-disks. The problem seems to occur when you attach a USB-2.0 cable to an USB3 port. In my case the problem started when I connected a wireless USB adapter through a USB2 extension cable to a USB3 port. The wireless adapter works, OK but I get this error stream. I solved the problem by simply connecting the cable to a USB2 port. When I connect the USB-adapter directly to the USB3 port I get no errors either. I hope this is of any help -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/883646 Title: "ERROR no room on ep ring" fills up syslog and hard disk in minutes To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/883646/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
