RTL8192EU USB Wifi error: rtwn0: r92e_power_off: failed to block Tx queues

[Kris G]

Hi,

I can't seem to get my USB wifi working. Here is what I see..

Logs when I insert the device.

kernel: rtwn0 on uhub0
kernel: rtwn0: <802.11n NIC> on usbus0
kernel: rtwn0: MAC/BB RTL8192EU, RF 6052 2T2R
kernel: wlan0: Ethernet address: a0:f4:59:7f:4b:8c
kernel: wlan0: ieee80211_new_state_locked: pending INIT -> SCAN transition
lost


# wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf
Successfully initialized wpa_supplicant
ioctl[SIOCS80211, op=103, val=0, arg_len=128]: Network is down
wlan0: CTRL-EVENT-SCAN-FAILED ret=-1 retry=1
wlan0: CTRL-EVENT-TERMINATING

Logs below returned when running wpa_supplicant command above.

kernel: ugen0.4: <Realtek 802.11n NIC> at usbus0 (disconnected)
kernel: rtwn0: at uhub0, port 4, addr 6 (disconnected)
kernel: rtwn0: r92e_power_off: failed to block Tx queues
kernel: rtwn0: detached
root[70569]: /etc/rc.d/netif: WARNING: wlan0 does not exist.  Skipped.
kernel: usb_alloc_device: set address 4 failed (USB_ERR_IOERROR, ignored)
kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_IOERROR
kernel: usbd_req_re_enumerate: addr=4, set address failed!
(USB_ERR_IOERROR, ignored)
kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_IOERROR
kernel: usbd_req_re_enumerate: addr=4, set address failed!
(USB_ERR_IOERROR, ignored)
kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_IOERROR
kernel: usbd_req_re_enumerate: addr=4, set address failed!
(USB_ERR_IOERROR, ignored)
kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_IOERROR
kernel: usbd_req_re_enumerate: addr=4, set address failed!
(USB_ERR_IOERROR, ignored)
kernel: usbd_setup_device_desc: getting device descriptor at addr 4 failed,
USB_ERR_IOERROR
kernel: ugen0.4: <Unknown > at usbus0 (disconnected)
kernel: uhub_reattach_port: could not allocate new device

I now have to reinsert the device to have it attached again. How can I fix
error " kernel: rtwn0: r92e_power_off: failed to block Tx queues"

# usbconfig -d 0.4 dump_all_desc
ugen0.4: <Realtek 802.11n NIC> at usbus0, cfg=0 md=HOST spd=HIGH (480Mbps)
pwr=ON (500mA)

  bLength = 0x0012
  bDescriptorType = 0x0001
  bcdUSB = 0x0210
  bDeviceClass = 0x0000  <Probed by interface class>
  bDeviceSubClass = 0x0000
  bDeviceProtocol = 0x0000
  bMaxPacketSize0 = 0x0040
  idVendor = 0x0bda
  idProduct = 0x818b
  bcdDevice = 0x0200
  iManufacturer = 0x0001  <Realtek>
  iProduct = 0x0002  <802.11n NIC>
  iSerialNumber = 0x0003  <00e04c000001>
  bNumConfigurations = 0x0001

 Configuration index 0

    bLength = 0x0009
    bDescriptorType = 0x0002
    wTotalLength = 0x0035
    bNumInterfaces = 0x0001
    bConfigurationValue = 0x0001
    iConfiguration = 0x0000  <no string>
    bmAttributes = 0x00e0
    bMaxPower = 0x00fa

    Interface 0
      bLength = 0x0009
      bDescriptorType = 0x0004
      bInterfaceNumber = 0x0000
      bAlternateSetting = 0x0000
      bNumEndpoints = 0x0005
      bInterfaceClass = 0x00ff  <Vendor specific>
      bInterfaceSubClass = 0x00ff
      bInterfaceProtocol = 0x00ff
      iInterface = 0x0002  <802.11n NIC>

     Endpoint 0
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0084  <IN>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0200
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000

     Endpoint 1
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0005  <OUT>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0200
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000

     Endpoint 2
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0006  <OUT>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0200
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000

     Endpoint 3
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0087  <IN>
        bmAttributes = 0x0003  <INTERRUPT>
        wMaxPacketSize = 0x0040
        bInterval = 0x0003
        bRefresh = 0x0000
        bSynchAddress = 0x0000

     Endpoint 4
        bLength = 0x0007
        bDescriptorType = 0x0005
        bEndpointAddress = 0x0008  <OUT>
        bmAttributes = 0x0002  <BULK>
        wMaxPacketSize = 0x0200
        bInterval = 0x0000
        bRefresh = 0x0000
        bSynchAddress = 0x0000

Cheers
Kris