I only have some links on AMD/ATI.
https://wiki.ubuntu.com/X/Troubleshooting/VideoDriverDetection
Ubuntu Precise Installation Guide - AMD/ATI...
Type: Posts; User: oldfred; Keyword(s):
I only have some links on AMD/ATI.
https://wiki.ubuntu.com/X/Troubleshooting/VideoDriverDetection
Ubuntu Precise Installation Guide - AMD/ATI...
I do not know about AMD/ATI, but with nVidia I always have to use nomodeset on first boot until I have nVidia driver installed.
How to set NOMODESET and other kernel boot options in grub2 -...
Some older info on using two differnt video systems.
Boot using recovery mode & 'Reconfigure graphics' or
Create Portable Ubuntu for 2 different Video Cards - script...