On 24/08/14 11:31, Brian May wrote:

On 24 Aug 2014 11:14, "Brian May" <brian@microcomaustralia.com.au> wrote:
> Am going to try and disable gdm at boot, then I will be able be able to prove if X-Windows is a factor or not.

Seems that X-Windows is the only reason video works with 3.12

With gdm disabled, I get identical results with 3.12 - no display. So my guess is that X is not starting with 3.13 or 3.14, so there is nothing to "fix" whatever Linux did.

Linux 3.2.0 works fine...

So with GDM disabled you don't even get a console?
Or is after startx that there are no graphics?
Have you looked in /var/log/Xorg.0.log?

By the way, sorry, I just noticed that the latest kernel is 3.15 so you must be having problems with 3pointtwelve and above, I am still running the stock kernel installed with Wheezy 3.2 so haven't noticed any problems. I will keep this problem in mind if I think about upgrading my kernel to a more bleeding edge one. I mininterpreted 3.12 for 3.1.2 :-(.
I wonder what has changed and whether it will affect my GT 520 nvidia?