You have an unsupported DKMS module installed that broke the kernel upgrade. Remove it and retry the upgrade:
$ dkms remove 8812au/4.2.3 --all $ apt update $ apt upgrade
You have an unsupported DKMS module installed that broke the kernel upgrade. Remove it and retry the upgrade:
$ dkms remove 8812au/4.2.3 --all
$ apt update
$ apt upgrade