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Jags
Asked: 2019-10-20 12:58:01 +0800 CST

How to properly remove kernel modules for RTL88x2BU in Ubuntu MATE 19.04

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I have installed Realtek RTL88x2BU drivers from Cilynx's GitHub repo using DKMS installation in Ubuntu MATE 19.04 with kernel 5.3.4 (and later 5.3.7)

Drivers worked fine for a week, then suddenly stopped detecting TP-Link Archer T3U AC1300 Wireless USB Adapter altogether. The same adapter works fine with other PC.

This is how drivers were installed:

cd rtl88x2bu
VER=$(sed -n 's/\PACKAGE_VERSION="\(.*\)"/\1/p' dkms.conf)
sudo rsync -rvhP ./ /usr/src/rtl88x2bu-${VER}
sudo dkms add -m rtl88x2bu -v ${VER}
sudo dkms build -m rtl88x2bu -v ${VER}
sudo dkms install -m rtl88x2bu -v ${VER}
sudo modprobe 88x2bu

So how could I completely remove kernel modules of all the previous versions (1.1, 5.6.1, etc) for RTL88x2BU? Many thanks.

kernel realtek-wireless dkms 19.04

1 Answers

  1. Best Answer

    You can do the reverse steps:

    1. Unload module

      sudo modprobe -r 8822bu
sudo modprobe -r rtl88x2bu

    2. Check for all module builds status

      sudo dkms status

      output

      8822bu, 1.1: added
rtl88x2bu, 5.6.1, 5.2.21-050221-generic, x86_64: installed
rtl88x2bu, 5.6.1, 5.3.7-050307-generic, x86_64: installed

    3. Unregister it from DKMS, sudo dkms uninstall .. is optional as we are looking for complete purge.

      sudo dkms remove -m 8822bu/1.1
sudo dkms remove -m rtl88x2bu/5.6.1 -k 5.2.21-050221-generic
sudo dkms remove -m rtl88x2bu/5.6.1 -k 5.3.7-050307-generic

    4. Remove source from DKMS

      cd /usr/src/

      WARNING: Be careful rm -r is a dangerous command!

      sudo rm -r rtl88x2bu-*
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