In the past I used the instructions here to install a driver for my tplink t2u usb driver. This worked fine for quite some time, even when updating ubuntu from version 20.04 to 22.04.
However right now when I start (and reboot multiple times) my computer it says "no wifi adapter found". - The antenna is still working as booting into windows shows it working.
When I list the usb devices it is also found
$lsusb
...
Bus 001 Device 014: ID 2357:0120 TP-Link Archer T2U PLUS [RTL8821AU]
I tried to just run the install again, however that resulted into the error:
$ sudo make dkms_install
cp -r * /usr/src/8812au-5.6.4.2_35491.20191025
dkms add -m 8812au -v 5.6.4.2_35491.20191025
Error! DKMS tree already contains: 8812au-5.6.4.2_35491.20191025
You cannot add the same module/version combo more than once.
make: *** [Makefile:2303: dkms_install] Error 3
Which seems to indicate the driver is still "there" just not working? How can I fix this?
For completeness the full release information of my desktop system:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.1 LTS
Release: 22.04
Codename: jammy
$ uname -a
Linux paul-desktop 5.19.0-32-generic #33~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 30 17:03:34 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
I've uninstalled the current driver as I noticed that the driver worked for a different kernel version
$ dkms status
8812au/5.6.4.2_35491.20191025, 5.15.0-60-generic, x86_64: installed
Then reinstalling gave the following error:
$ sudo make dkms_install
cp -r * /usr/src/8812au-5.6.4.2_35491.20191025
dkms add -m 8812au -v 5.6.4.2_35491.20191025
Creating symlink /var/lib/dkms/8812au/5.6.4.2_35491.20191025/source -> /usr/src/8812au-5.6.4.2_35491.20191025
dkms build -m 8812au -v 5.6.4.2_35491.20191025
Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area...
'make' -j16 KVER=5.19.0-32-generic KSRC=/lib/modules/5.19.0-32-generic/build....(bad exit status: 2)
ERROR (dkms apport): binary package for 8812au: 5.6.4.2_35491.20191025 not found
Error! Bad return status for module build on kernel: 5.19.0-32-generic (x86_64)
Consult /var/lib/dkms/8812au/5.6.4.2_35491.20191025/build/make.log for more information.
make: *** [Makefile:2304: dkms_install] Error 10
The specific driver checks gave:
$ sudo modprobe 88XXau
modprobe: FATAL: Module 88XXau not found in directory /lib/modules/5.19.0-32-generic
$ sudo dmesg | grep -i 88XX
$
