Public bug reported: When using libusb-0.1 to poll an interrupt endpoint I discovered that after 64 timeouts that I could no-longer request any further data. Relevant syslog: -- Jul 21 17:11:31 kgw2 kernel: [ 1261.579022] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Jul 21 17:11:31 kgw2 kernel: [ 1261.579025] usb 9-3: usbfs: usb_submit_urb returned -12 -- After looking through the libusb code and finding no possible explanation I then moved my device to a USB 2.0 port on the PC and the problem disappeared. I'm experiencing this problem on Ubuntu 11.04 (kernel "Ubuntu 2.6.38-10.46-generic 2.6.38.7") and I can dig into this a lot more if necessary.
** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/814682 Title: USB 3.0 (xhci_hcd) fails to discard URBs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/814682/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs