When I try to connect my ER9XPro USB device to my Fedora 21 server, it fails to connect with:
[1024110.158374] usb 1-7: new full-speed USB device number 15 using xhci_hcd [1024110.312216] usb 1-7: device descriptor read/64, error -71 [1024110.565928] usb 1-7: device descriptor read/64, error -71 [1024110.819660] usb 1-7: new full-speed USB device number 16 using xhci_hcd [1024110.973497] usb 1-7: device descriptor read/64, error -71 [1024111.227212] usb 1-7: device descriptor read/64, error -71 [1024111.480928] usb 1-7: new full-speed USB device number 17 using xhci_hcd [1024111.482576] usb 1-7: Device not responding to setup address. [1024111.693836] usb 1-7: Device not responding to setup address. [1024111.894473] usb 1-7: device not accepting address 17, error -71 [1024112.047316] usb 1-7: new full-speed USB device number 18 using xhci_hcd [1024112.047415] usb 1-7: Device not responding to setup address. [1024112.298755] usb 1-7: Device not responding to setup address. [1024112.498815] usb 1-7: device not accepting address 18, error -71 [1024112.498836] usb usb1-port7: unable to enumerate USB device
It is a direct connection (no hub).
Any ideas?
Cheers and thanks, Stephen