There is no upgrading issue when using nvidia-graphics-drivers-430 430.50-0ubuntu1~0.18.04.3 on ppa:albertomilone/lp1847979. However xserver-xorg-video-nvidia-418 is removed and xserver-xorg-video-nvidia-430 is not installed.
There is no upgrading issue when using nvidia- graphics- drivers- 430 430.50- 0ubuntu1~ 0.18.04. 3 on ppa:albertomilo ne/lp1847979. xorg-video- nvidia- 418 is removed and xserver- xorg-video- nvidia- 430 is not installed.
However xserver-