Steam Ubuntu 14.04 libGL.so.1 Bumblebee

For the optimus-based ssytems, you need generic mesa libraries for normal operation, and then bumblebee will switch to the NVidia's ones when needed.

These links are actually controlled by the alternatives mechanism.
To choose which one you would like to use invoke:

$ sudo update-alternatives --config i386-linux-gnu_gl_conf
There are 3 choices for the alternative i386-linux-gnu_gl_conf (providing /etc/ld.so.conf.d/i386-linux-gnu_GL.conf).

  Selection    Path                                              Priority   Status
------------------------------------------------------------
  0            /usr/lib/nvidia-331-updates/alt_ld.so.conf         8604      auto mode
* 1            /usr/lib/i386-linux-gnu/mesa/ld.so.conf            500       manual mode
  2            /usr/lib/nvidia-331-updates-prime/alt_ld.so.conf   8603      manual mode
  3            /usr/lib/nvidia-331-updates/alt_ld.so.conf         8604      manual mode

Press enter to keep the current choice[*], or type selection number: 

Be sure to set up the mesa one.

Same for the 64bit libraries:

$ sudo update-alternatives --config x86_64-linux-gnu_gl_conf
There are 3 choices for the alternative x86_64-linux-gnu_gl_conf (providing /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf).

  Selection    Path                                          Priority   Status
------------------------------------------------------------
  0            /usr/lib/nvidia-331-updates/ld.so.conf         8604      auto mode
  1            /usr/lib/nvidia-331-updates-prime/ld.so.conf   8603      manual mode
  2            /usr/lib/nvidia-331-updates/ld.so.conf         8604      manual mode
* 3            /usr/lib/x86_64-linux-gnu/mesa/ld.so.conf      500       manual mode

Press enter to keep the current choice[*], or type selection number:

Reboot the system afterwards and try launching steam again.


@DavidWinchester running this command (below) works well:

sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/libGL.so.1 

thanks for posting the question