recently reading an OMG Ubuntu post, decided to try the new 18.04.02 4.18 Kernel (https://www.omgubuntu.co.uk/2019/02/ubuntu-18-04-2-lts-released) by installing the packages to my 18.04.01 with the current 4.15 Kernel. However this destroyed my display prop drivers, (installed from https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa), so I removed them. However even after uninstalling them my display kept bugging. Ubuntu's nightlight didn't work, neither did the brightness settings.
Loosing all hope I reverted back to the 4.15 Kernel however the problem persists... I have no nvidia prop drivers installed currently, I have the old 4.15 Kernel, and the problem persists.
In order to understand the problem I wanted to ask several questions:
1) What are the default Ubuntu graphic drivers, and why do they break after updating the Kernel? How can I reinstall them? Where can I check if they are blacklisted?
2) General question, but will the packages build for 18.04.
02 run on 18.04.
01 system? If not how can I install an older version of any package when the apt tool shows only the newest version? For example right now I am with 18.04.01 but I see that the nvidia-drivers are version .02. Will this be a problem for my system?
Sorry if you find my lack of knowledge on the subject and my actions irritating, but that's Linux, we learn through breaking stuff!