I have Kubuntu 18.04. In the past, I had followed some procedures ( I don't remember them any more ) to use Kernel version 5.x instead of 4.x. Now, grub shows up the two kernels and both of them receive updates. However, the working kernel by default now is the 5.x.
I need to return back to the 4.x kernel to be the default kernel and keeping the 5.x.
I have tried to enter in the grub menu during booting and choosing the 4.x kernel, but it only boots in that kernel for just the current session only.
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