USB Antenna not detected after power loss

[Raphaelb10]

Hi,
I use the archer t2u in an embedded application, in which I need to shutdown the Ubuntu 20.04 computer by cutting its power source.

If I cut power like this and then restart, the USB wifi dongle is not detected anymore. The LED of the antenna is not green. It is even not possible to make it work by unplugging and plugging it back. I need to perform several restart to recover it.

However if I do a clean reboot using shutdown/reboot commands, the driver is loaded and is able to detect the antenna successfully straight away.

Any idea of what could be wrong in the loading of the driver at boot ?

Other USB devices are always detected/working no matter how I reboot. Which makes me think it is related to Dmks

Thanks in advance,