@bna 

Hi,

Most likely the drivers you have installed are not compatible with newer versions of the kernel.

Do you remember the original source of the driver? Was it installed via some GitHub page? If yes, then check if they have an updated driver available.

  @woozle the GitHub page of the driver: 

https://github.com/morrownr/8821au-20210708 

there is an updated driver available, but i'm not sure about kernel 6.14 support.. 

  @bna 

On that GitHub page there are mentions of "support for kernel 6.14" and furthermore it also states "An in-kernel driver for the rtl8821/11au chipsets has been merged into kernels 6.13 and 6.14".

That should mean you have two possible options.

1) Update your installed driver to the latest version by following these instructions https://github.com/morrownr/8821au-20210708#upgrading-the-driver

2) Completely uninstall (i.e. remove) the old out-of-kernel driver(s) for the T2U Nano and then the in-kernel driver of kernel 6.14 should automatically take over https://github.com/morrownr/8821au-20210708?tab=readme-ov-file#removal-of-the-driver-remove-driversh

You might need to reinstall dkms for that driver or manually build it from source — I faced a similar issue and a quick rebuild fixed it. Feels like troubleshooting this is almost like reading a guide from Reddy Anna Book – step by step but worth it in the end.