I had installed NVIDIA drivers along with nvidia prime on Ubuntu 12.04, to run CUDA-based applications in a first time. Then, I created a mess on the system because I installed Bumblebee as well, but I was not aware about the incompatibility issues between Bumblebee and nvidia prime. As a result, nothing more worked. Now I would like to recover the previous configuration.
However, if I type on terminal
lspci | grep -i vga the only output item is
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
that is the inner intel chipset of my laptop. As you see, the NVIDIA graphic card does not appear (of course it did when everything worked). I also tried to install the
nvidia-340 driver, but after the reboot the system does not detect the card yet.
In addition, but I don't know if it is correlated, I'm not able to install
nvidia-prime anymore. When I try to do that, the output is:
Package nvidia-prime is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package nvidia-prime has no installation candidate
Does anyone knows where the issue lies? Thanks in advance