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Adding additional info as suggested by chili555 in Wireless antenna does not appear despite its driver being installed.

I installed the rtl8812au driver via apt and installation seems to be successful. The device is a USB-wifi dongle that is recognized by lsusb

lsusb
Bus 001 Device 004: ID 0bda:a811 Realtek Semiconductor Corp. RTL8811AU 802.11a/b/g/n/ac WLAN Adapter

But not by iwconfig.

DKMS sees the driver.

 $ dkms status | grep rtl
   rtl8812au, 4.3.8.12175.20140902+dfsg, 5.0.0-13-generic, x86_64: installed
   rtl8812au, 4.3.8.12175.20140902+dfsg, 5.0.0-15-generic, x86_64: installed

But the driver does not appear as a module :

  lsmod | grep rtl
  btrtl                  20480  1 btusb
  bluetooth             557056  73 
  btrtl,hidp,btintel,btbcm,bnep,btusb,rfcomm

Adding additional info as suggested by chili555

  modinfo 8812au | grep A811
  alias:          usb:v7392pA811d*dc*dsc*dp*ic*isc*ip*in*

*Note that this output does not include Chilli's hoped for: *

alias:          usb:v0BDApA811d*dc*dsc*dp*ic*isc*ip*in*

But I am not sure why we should be expecting that value.

 dmesg | grep l8812

returns empty

Checking journalctl 

 journalctl | grep 8812
 TTY=pts/9 ; PWD=/hd2/projects ; USER=root ; COMMAND=/usr/sbin/modprobe rtl8812au
 TTY=pts/9 ; PWD=/hd2/projects ; USER=root ; COMMAND=/usr/sbin/modprobe rtl8812au-dkms
 TTY=pts/9 ; PWD=/hd2/projects ; USER=root ; COMMAND=/usr/sbin/modprobe rtl8812
 TTY=pts/9 ; PWD=/hd2/projects ; USER=root ; COMMAND=/usr/sbin/modprobe -r rtl8812au
Stephen Boston
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  • @chili555 Thanks chili, although the question is the same and the diagnostics apply, I do not have the same problem. There is no module format error. I wonder about the missing alias -- as noted in the edited question. Is that meaningful? What could be the issue here? – Stephen Boston May 16 '19 at 03:22
  • Try using https://github.com/abperiasamy/rtl8812AU_8821AU_linux – Jeremy31 May 16 '19 at 09:27
  • @Jeremy31 Worked. Post as answer. – Stephen Boston May 16 '19 at 12:32
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    The correct and exact alias must be in the driver or it does not claim and drive the device. Glad it's working. – chili555 May 16 '19 at 13:04

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