RTL8812au wifi stick not recognised

[Graham Jenkins]

apt install rtl8812au-dkms
   ..
  Building initial module for 5.4.0-72-generic
   ..
  DKMS: install completed.

modprobe 8812au

lsmod |grep 8812au
  8812au 1290240 0
  cfg80211 704512 3 mt7601u,8812au,mac80211

Upon insertion, syslog shows:
--
usb 3-12: new high-speed USB device number 8 using xhci_hcd
usb 3-12: New USB device found, idVendor=2604, idProduct=0012, bcdDevice= 0.00
usb 3-12: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-12: Product: 802.11n NIC
usb 3-12: Manufacturer: Realtek
usb 3-12: SerialNumber: 123456
checking bus 3, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-12"
bus: 3, device: 8 was not an MTP device
--

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: rtl8812au-dkms 4.3.8.12175.20140902+dfsg-0ubuntu13~20.04.1
ProcVersionSignature: Ubuntu 5.4.0-72.80-generic 5.4.101
Uname: Linux 5.4.0-72-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sat May 8 20:03:27 2021
InstallationDate: Installed on 2021-05-03 (5 days ago)
InstallationMedia: Ubuntu-Server 20.04.2 LTS "Focal Fossa" - Release amd64 (20210201.2)
PackageArchitecture: all
SourcePackage: rtl8812au
UpgradeStatus: No upgrade log present (probably fresh install)

[Jeremy (wa113y3s)]

The code needs a patch at line 285 of os_dep/linux/usb_intf.c

 {USB_DEVICE(0x2604, 0x0012),.driver_info = RTL8812}, /* Tenda - U12 */