Help installing 0bda:0811 Realtek Semiconductor Corp.

Question

I was running my OS off a USB stick fine and the wifi was working. I installed it to my SSD and setup again but not the WIFI adaptor isn't working.

I followed the first time Having problems seeing my wifi Ubuntu Gnome 16.04 and it worked but since installing onto the SSD and doing the same its not working.

No wlan0 interface found
Please check drivers, try lsusb to check USB device is present
root@goldminer:~# lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0bda:0811 Realtek Semiconductor Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

On the working device

root@coalminer:~# dkms status
amdgpu, 18.10-572953, 4.13.16-hiveos, x86_64: installed
amdgpu, 18.10-572953, 4.4.0-127-generic, x86_64: installed
nvidia, 390.59, 4.13.16-hiveos, x86_64: installed
nvidia, 390.59, 4.4.0-127-generic, x86_64: installed
rtl8812au, 4.2.2, 4.13.16-hiveos, x86_64: installed
rtl8812au, 4.2.2, 4.4.0-127-generic, x86_64: installed

On the SSD

root@goldminer:~# dkms status
amdgpu, 18.10-572953, 4.13.16-hiveos, x86_64: installed
amdgpu, 18.10-572953, 4.4.0-127-generic, x86_64: installed
nvidia, 390.59, 4.13.16-hiveos, x86_64: installed
nvidia, 390.59, 4.4.0-127-generic, x86_64: installed
rtl8812au, 4.2.2, 4.13.16-hiveos, x86_64: installed (WARNING! Diff between built and installed module!)
rtl8812au, 4.3.8.12175.20140902+dfsg: added
rtl8812au, 5.2.9: added

Any advise? I think from trying to fix it ive been making it worse.

Solution

Resolved.

I wiped the SSD and put the image on again.

Then straight away did

sudo apt purge rtl8812au-dkms
sudo apt install git
git clone https://github.com/gnab/rtl8812au.git
sudo cp -r rtl8812au  /usr/src/rtl8812au-4.2.2
sudo dkms add -m rtl8812au -v 4.2.2
sudo dkms build -m rtl8812au -v 4.2.2
sudo dkms install -m rtl8812au -v 4.2.2

Rebooted and its working.

Comments

[Janos Szabo]

Thank you. It worked like charm. Do I guess well that it need to be done every kernel update? It seems so

[Vladius]

DKMS is for auto-updating. Should be working fine.

[rodvlopes]

It worked like a charm on Ubuntu 18.04.

[Aleksey Deryagin]

Use askubuntu.com/a/1165787/19938 for 5.x kernel

[Jordan Rieger]

This worked for me with Ubuntu 18.04.1 LTS kernel 5.3.0-46-generic #38. But I found that WiFi 5/5.8 GHz performance was almost unusable. WiFi 2.4 GHz performance was fine. I'm going to try the 5.x kernel driver mentioned above.

[Jordan Rieger]

@AlekseyDeryagin That 5.x driver repository has been removed :-(