rhel 8.0 not booting in gui mode

 

 

I was updated   install libelf-dev, libelf-devel or elfutils-libelf-devel packages .

 

after that nvidia drivers installation   completed.it  not booting in GUI mode, it will run in CLI mode directly.

 

 

i run below command it shows black screen only not showing anything.

# systemctl isolate graphical.target

after this i press alt+f4 and run below command to change GUI mode but its not getting update

# systemctl set-default graphical.target
 

PLEASE RESOLVE ISSUE ON PRIORITY 

system not booting into GUI mode. and i attached screenshots for reference and i attached Nvidia install in rhel document what i enter commands.