I’ve been struggling with getting the nvidia drivers to work on ubuntu 19.04. I’ve managed to overcome the “black screen of death” based on this forum (my fix was to delete 20-intel.conf file).
Now I’m facing a performance issue. When on “powersaving mode (intel)” I get higher perfomance (max of 7600 fps on glxgears) than in “performance mode (nvidia)” (max of 3300 fps on glxgears). Flicker happens occasionally and hdmi output is slow as well.