I have still instabilities with the xen kernels 5.x (sudden system
freeze). I also have a small /boot and hold only the last 3 kernels.
They are right now:
I would like to mark the (for me very stable) kernel 4.19.155 as "do not
erase while updating" and remove the (for me) useless kernel
vmlinuz-5.4.78-1.qubes.x86_64. How can I do that, please? I fear to
make a mess when just "playing around". I also want to keep 5.x kernels
for appVM's (they work well). Thank you!