Originally Posted by _kal_
If I connect the HDMI cable before turning on my compouter, then i get this error :
NVIDIA: could not open the device file /dev/nvidia0 (Input/output error).
BUT, if I start my computer without any hdmi cable connected and connect one when kernel starts, then it works!
So it works if you connect the HDMI cable after the system has completed its POST, but before the NVIDIA Linux graphics driver has been loaded?