Recently I upgraded from Ubuntu 14.04.4 to 14.04.5 as my HWE stack support ran out.
I'm also using ppa:graphics-drivers/ppa for latest proprietary nvidia drivers.
My notebook is a Gigabyte P35W v2, with a core i7 and a nvidia GTX 870m.
About a year ago I had this black screen issue, after switching from the on cpu intel card to the dedicated nvidia card with prime-select nvidia. It could be resolved by setting the intel driver entry in /etc/X11/xorg.conf to modesetting and a chattr +i /etc/X11/xorg.conf. As explained on the link above, it looks like gpu-manager is rewriting /etc/X11/xorg.conf with the wrong driver, resulting in the black screen.
There was an update to this issue, as I conveniently could switch GPUs with prime-select again before upgrading to 14.04.5. This issue is occurring again after the upgrade, and could be solved again with above solution. It was working fine with nvidia-370 and 14.04.4 before. So I guess the ubuntu-driver-package containing gpu-manager in 14.04.5 is causing this (again?).
My question now is, where do I have to report this issue so the package gets fixed again?
