If /boot/ is too full (check with df),
we need to uninstall old kernels.
List installed packages with dpkg --get-selections, filter for kernels with grep, e.g., version 6.6.20:
niklas@starfive:~$ dpkg --get-selections | grep 6.6.20
linux-headers-6.6.20-cosec-test+ install
linux-headers-6.6.20-starfive install
linux-image-6.6.20-cosec-test+ install
linux-image-6.6.20-starfive installKeep the original kernel (linux-image-6.6.20-starfive).
Uninstall others with dpkg -P, e.g.,
sudo dpkg -P linux-headers-6.6.20-cosec-test+ linux-image-6.6.20-cosec-test+