GTX GT 720M on Ubuntu...

Hello… I have Ubuntu 18.04.1 LTS… When I install nvidia drivers and restart my laptop, the screen switched from text mode to black screen and so on alternating…
Please, help…

Just wait for about 2 minutes, then the flickering should stop and you should be able to log in on the test console. There, please run nvidia-bug-report.sh as root and attach the resulting .gz file to your post. Hovering the mouse over an existing post of yours will reveal a paperclip icon.
https://devtalk.nvidia.com/default/topic/1043347/announcements/attaching-files-to-forum-topics-posts/
If you have internet connection, you can use pastebinit to upload it from console.

  • install pastebinit (sudo apt install pastebinit)
  • unzip logfile (gunzip nvidia-bug-report.log.gz)
  • upload logfile (pastebinit -i nvidia-bug-report.log)
  • note down and post the url you’re given