The Coral TPU driver has basically been abandoned by Google so if you are running a Linux kernel newer than 6.2 it will not function.
https://github.com/google/gasket-driver is the original driver which was archived on April 18, 2026
You can try the driver https://github.com/feranick/gasket-driver or https://github.com/dude84/gasket-driver-coral or search through the forks of the original gasket-dkms driver https://github.com/google/gasket-driver/forks
So in the future your options are to pin your kernel to 6.2, upgrade your hardware, hope that someone will keep a gasket-dkms fork updated for newer kernel versions, or make your own fork to do so yourself.
Unfortunatly this is not possible for my setup. I have a Asrock J4050 with its soldered cpu. So I need something like a separate device. USB, SBC with lan, anything like that… Because of that, I was happy when i discovered coral. And to be honest: I did not researched deeply. So I am unaware of its limitation to frigate. I wanted to create my own model and run it on coral. The training was planned to be done on another device.
Now I need to check if a raspi could be sufficent or if anything else comes up.