I have an identical problem to the chap in the question-link below (who even provided a video of his problem), where the screen "scrambles" when it loads:
I seem to be using a slightly different graphics card, though (AMD HD6670). My PC is brand new, and is an Advent DT2111.
This is my first time ever trying to use linux, so don't know anything about it. It seems I need to update a driver from within Ubuntu, but how do I do that if I can't even access it? I have tried loading it in safe graphics mode, and the same thing happens.
I am really lost as to what to do, and advice in other links is just too advanced for me at this beginning stage of my Ubuntu experience (i.e. non-existent).
Help gratefully received!