How can I get past the blank purple screen on my Ubuntu 18.04 LTS system?

[マスターズ・イアン]

Thanks for the reply.

  > Is this page of any use?
> 
> https://askubuntu.com/questions/120096/ubuntu-hangs-at-purple-screen

There is no fglrx package for v18.

I tried replacing $linuxgfxmode from the 3rd or 4th line down and replace with nomodeset, but that didn't change anything.

I decided not to try anything else on that page as the Ubuntu version referenced was version 11.

ian