Your attached bug report indicates that the driver still isn’t properly installed: the X driver “nvidia_drv.so” couldn’t be found, so the X server fell back to the nouveau driver:
[ 5.882] (WW) Warning, couldn't open module nvidia
[ 5.882] (EE) Failed to load module "nvidia" (module does not exist, 0)
[...]
[ 5.886] (II) NOUVEAU driver Date: Thu Aug 28 03:57:48 2014 +0200