Here is the output on my optimus laptop. I suffer from the same issue of no video output on Nvidia, but Intel's working fine. Have to go to VT and purge nvidia and restart. Then reinstall nvidia and switch to Intel using nvidia-settings.
Ubuntu Trusty. Dell XPS L502X, Intel HD Graphics, Nvidia 540M. ** Attachment added: "Output of apt-cache policy nvidia-331 && apt-cache policy nvidia-331-updates" https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1268771/+attachment/3964187/+files/output.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nvidia-graphics-drivers-331-updates in Ubuntu. https://bugs.launchpad.net/bugs/1268771 Title: NVIDIA Prime fails with Linux 3.13 Status in “nvidia-graphics-drivers-331” package in Ubuntu: Fix Released Status in “nvidia-graphics-drivers-331-updates” package in Ubuntu: Fix Released Bug description: When I select the Nvidia® graphics card from control panel using nvidia-prime, after logging out, the screen goes black and the only way to approach it is in text mode. I also used the nvidia-prime 4.2 in Ubuntu 13.10 but I have never encountered such problems. ---------------------------- Specifications --------------------------- Operative System : Ubuntu 14.04LTS 64bit (Daily Build) Package: nvidia-prime 0.5.3 Driver: nvidia-331-updates Graphics: Nvidia® GeForce® 610M Processor: Intel® Core™ i7-2670QM ----------------------------------------------------------------------- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1268771/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
