Comment 21 for bug 1432171

Hello.

I'm experiencing exactly the same problem. I have freshly installed Ubuntu 15.04 with Gnome. When I was upgrading Gnome 3.14 to 3.16 I was asked to upgrade what I believe to be the kernel (? - I'm a Linux newcomer, I'm not 100% sure what am I even doing) from 3.19.0-15 to 3.19.0-16. I installed also proprietary NVidia Drivers. Now, using the advanced options in GRUB I managed to boot 3.19.0-15. I installed upstart-sysv and rebooted my computer. Something changed, I got some flashes of Gnome and got

Ubuntu 15.04 ComputerName
ComputerName log-in

printed on my screen. Then everything disappeared and the screen remain black. I booted 3.19.0-15 again and reactivated Nouveau driver. Then I rebooted again and... everything is fine.

Conclusion - the error is related to the combination Nvidia driver - version 346.59 and 3.19.0-15 kernel version.