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I have a Dell 15 l502x with NVIDIA GeForce GT525M with Optimus in it. I installed a fresh Ubuntu 16.04 LTS on it but am unable to use the NVIDIA card. 2 observations:

  1. All NVIDIA drivers installation fail, I have tried many versions. I saw this error: W: Possible missing firmware for module i915. It gets stuck in the login screen loop after reboot.

  2. Settings show that the graphics card is 'Gallium 0.4 on llvmpipe (LLVM 4.0, 256 bits)'. When I do sudo apt-get install xserver-xorg-video-intel, it throws this error: 

    the following packages have unmet dependencies:
xserver-xorg-video-intel : Depends: xorg-video-abi-20
Depends: xserver-xorg-core (>= 2:1.17.99.902)
E: Unable to correct problems, you have held broken packages.

Background: I had Ubuntu 14.04 LTS before this where I tried installing ROS. I do remember it saying something like, some packages could destroy my Xserver. But, I installed Ubuntu 16.04 over 14.04 as fresh install, without updating. I apologize, I am a little new.

Eliah Kagan
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pahadi_bhula
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1 Answers1

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This worked for me: 1. Update package lists

sudo apt-get update

  1. Remove nouveau

    sudo apt-get remove xserver-xorg-video-nouveau

  2. Install bumblebee, primus and NVidia Drivers

    sudo apt-get install bumblebee-nvidia nvidia-384

  3. Blacklist NVidia Drivers in your /etc/modprobe.d/bumblebee.conf i.e add towards the end of file ' # 384 blacklist nvidia-384 blacklist nvidia-384-updates blacklist nvidia-experimental-384 '

  4. Update bumblebee Config to Point to 384.x Drivers in /etc/bumblebee/bumblebee.conf ....Driver=nvidia ... LibraryPath=/usr/lib/nvidia-384:/usr/lib32/nvidia-384 ... XorgModulePath=/usr/lib/nvidia-384/xorg,/usr/lib/xorg/modules ...

  5. Select Mesa as your GL Provider

    sudo update-alternatives --config i386-linux-gnu_gl_conf Select /usr/lib/i386-linux-gnu/mesa/ld.so.conf

    sudo update-alternatives --config x86_64-linux-gnu_egl_conf Select /usr/lib/x86_64-linux-gnu/mesa-egl/ld.so.conf

    sudo update-alternatives --config x86_64-linux-gnu_gl_conf Select /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf

  6. Reboot

    sudo reboot

  7. Disable gpu-manager i.e Add nogpumanager to your /etc/default/grub file ... GRUB_CMDLINE_LINUX="nogpumanager" ...

  8. Update your grub menu

    sudo update-grub

  9. Re-build the bbswitch and nvidia modules.

    sudo dpkg-reconfigure bbswitch-dkms sudo dpkg-reconfigure nvidia-384

  10. Reboot

    sudo reboot

Source: http://lenovolinux.blogspot.co.uk/2016/05/bumblebee-on-lenovo-t440p-nvidia-gt.html?m=1

pahadi_bhula
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