Does anyone see "IEEE 802.11AC"?

[bjlockie]

Does anyone see "IEEE 802.11AC"?

$ iwconfig wlx1cbfce9e4193 IEEE 802.11a ESSID:

[TheJags]

I do get to see IEEE 802.11AC if I set the router to 5.0 GHz. My router have dual bands but it's not simultaneous, so it's either 5.0 GHz or 2.4 GHz.

iwconfig results:

When router is set to 5.0 GHz:
wlxd0374547816a  IEEE 802.11AC  ESSID:"SSID-Name_optout_nomap"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:5.2 GHz  Access Point: <MAC ID>
          Bit Rate:434 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=94/100  Signal level=-34 dBm  Noise level=0 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

When router is set to 2.4 GHz:
wlxd0374547816a  IEEE 802.11bgn  ESSID:"SSID-Name_optout_nomap"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.412 GHz  Access Point: <MAC ID>
          Bit Rate:200 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=87/100  Signal level=-49 dBm  Noise level=0 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0```

[bjlockie]

Does your device show up as USB3? lsusb -v -d 0bda:b812 probably (lsusb will show you the device (eg. 0bda:b812)). Look for 'bcdUSB xxxx' and 'Device can operate at Full Speed (12Mbps) Device can operate at High Speed (480Mbps)'

[TheJags]

This TP-Link Archer T3U wireless adapter is connected to the PC via USB 2.0 port. This desktop does not have USB 3.0 port.

Here's the result of lsusb -v -d 2357:012d anyway:

Bus 001 Device 003: ID 2357:012d TP-Link 802.11ac NIC
Device Descriptor:
  bcdUSB               2.10
  idVendor           0x2357 TP-Link
  bcdDevice            2.10
  iManufacturer           1 Realtek
  iProduct                2 802.11ac NIC
... ... ...
Binary Object Store Descriptor:
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      HIRD Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x0006
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)

[bjlockie]

This might be telling "SuperSpeed USB Device Capability". I suspect the interface is USB 3 but the internals are USB 2. Mine won't connect at USB 3 even in a USB 3 port, It says the same as yours. I'll ask the USB people. :-) Thanks.

[bjlockie]

The module has a parameter to switch to USB 3 mode. Put options 88x2bu rtw_switch_usb_mode=1 in /etc/modeprobe.d/88x2bu.conf on ubuntu. It seems "fake" (maybe fooling the USB subsystem. I don't think the driver has full 80211AC support for use as an AP so I've ordered a 8812AU based chip (a bit older but I'm hoping to use it as an access point).