When I initially inserted the TP-Link Wifi adaptor to my ASUS 1215N (usb 3) , it worked fine. However, after I removed and re-inserted it, I got tonns of error messages, looking like: Aug 15 11:00:24 tknetbook kernel: [ 6440.286099] hub 6-0:1.0: unable to enumerate USB device on port 1 Aug 15 11:00:25 tknetbook kernel: [ 6440.720086] usb 6-1: new full speed USB device number 56 using xhci_hcd Aug 15 11:00:25 tknetbook kernel: [ 6440.720185] usb 6-1: Device not responding to set address. Aug 15 11:00:25 tknetbook kernel: [ 6440.921183] usb 6-1: Device not responding to set address. Aug 15 11:00:25 tknetbook kernel: [ 6441.122049] usb 6-1: device not accepting address 56, error -71 Aug 15 11:00:25 tknetbook kernel: [ 6441.173098] hub 6-0:1.0: unable to enumerate USB device on port 1 Aug 15 11:00:31 tknetbook kernel: [ 6447.150071] usb 6-2: new high speed USB device number 58 using xhci_hcd Aug 15 11:00:31 tknetbook kernel: [ 6447.173900] xhci_hcd 0000:01:00.0: WARN: short transfer on control ep Aug 15 11:00:31 tknetbook kernel: [ 6447.177517] xhci_hcd 0000:01:00.0: WARN: short transfer on control ep Aug 15 11:00:31 tknetbook kernel: [ 6447.179534] xhci_hcd 0000:01:00.0: WARN: short transfer on control ep Aug 15 11:00:31 tknetbook kernel: [ 6447.180891] xhci_hcd 0000:01:00.0: WARN: short transfer on control ep Aug 15 11:00:31 tknetbook kernel: [ 6447.181048] usb 6-2: New USB device found, idVendor=148f, idProduct=2070 Aug 15 11:00:31 tknetbook kernel: [ 6447.181058] usb 6-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Aug 15 11:00:31 tknetbook kernel: [ 6447.181067] usb 6-2: Product: 802.11 g WLAN Aug 15 11:00:31 tknetbook kernel: [ 6447.181073] usb 6-2: Manufacturer: Ralink Aug 15 11:00:31 tknetbook kernel: [ 6447.181079] usb 6-2: SerialNumber: 1.0 Aug 15 11:00:31 tknetbook kernel: [ 6447.197917] xhci_hcd 0000:01:00.0: WARN: short transfer on control ep Aug 15 11:00:31 tknetbook mtp-probe: checking bus 6, device 58: "/sys/devices/pci0000:00/0000:00:1c.3/0000:01:00.0/usb6/6-2" Aug 15 11:00:32 tknetbook mtp-probe: bus: 6, device: 58 was not an MTP device Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> found WiFi radio killswitch rfkill16 (at /sys/devices/pci0000:00/0000:00:1c.3/0000:01:00.0/usb6/6-2/6-2:1.0/ieee80211/phy15/rfkill16) (driver (unknown)) Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): driver supports SSID scans (scan_capa 0x01). Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): new 802.11 WiFi device (driver: 'rt2800usb' ifindex: 20) Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): exported as /org/freedesktop/NetworkManager/Devices/16 Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): now managed Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Aug 15 11:00:32 tknetbook NetworkManager[724]: <info> (wlan1): bringing up device. Aug 15 11:00:32 tknetbook kernel: [ 6447.637765] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637778] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637788] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637796] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637805] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637813] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637821] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637829] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637838] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637846] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637854] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637862] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637870] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637878] xhci_hcd 0000:01:00.0: ERROR no room on ep ring Aug 15 11:00:32 tknetbook kernel: [ 6447.637886] xhci_hcd 0000:01:00.0: ERROR no room on ep ring (repeats hundreds of times)
Update: It now appears to work despite the hundreds of messages?
Not sure which kernel you originally saw this with, but are you seeing it with 2.6.43/3.3?
Fedora 15 has reached it's end of life as of June 26, 2012. As a result, we will not be fixing any remaining bugs found in Fedora 15. In the event that you have upgraded to a newer release and the bug you reported is still present, please reopen the bug and set the version field to the newest release you have encountered the issue with. Before doing so, please ensure you are testing the latest kernel update in that release and attach any new and relevant information you may have gathered. Thank you for taking the time to file a report. We hope newer versions of Fedora suit your needs.