dual boot out of range!
 

Hi All,
I have a dual boot system, windows 10 pro, with ubuntu 18.04, if I select ubuntu on the grub screen, I get an error out out of range on my monitor. This doesn't happen all the time and by pressing the start button it will then start up, this has never happened on win 10. My computer is a hp 3500 i5 3rd gen 8gb ram on a ssd. Help would be greatly appreciated. Jim