I'm trying to get the GPU GeForce 940M on my new HP laptop ENVY 17-n101ng running (need CUDA eventually), but have somehow extreme troubles switching from Intel to Nvidia... I've installed nvidia-352 drivers, but could not just start using them... CUDA samples (e.g. deviceQuery) have been throwing errors... Hovewer, this command shows me both graphics cards:
lspci | grep -E "VGA|3D"
Then I've installed bumblebee:
sudo apt-get install bumblebee bumblebee-nvidia bbswitch-dkms primus
set zp the bumblebee.conf up according to my Nvidia drivers. I've been able to run
optirun glxgears
and
optirun nvidia-settings -c :8
and (for the 1st time) to see my GeForce 940M there!
However, I still could not start Nvidia samples... After all I've figured out the follolowing:
sudo update-alternatives --config x86_64-linux-gnu_gl_conf
and selected there "manual" or "auto" mode (do not remember this now). And... CUDA has started to operate!!! But after reboot I see only black screen... Trying to start X server by "startx" from the console leads to the following error
Fatal server error: no screens found
Now I'm lost... How can I fix my desktop at the moment? How can I still use my Nvidia card? Seems to be a real pain in Ubuntu on laptops...
Any help is kindly appreciated! Thanks in advance!
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