This means you cannot playback your stereo footage using OpenGL Stereo devices, such as active or passive 3d glasses
Customer reported version nuke.11.1v2
Customer reported platform centos6
Steps to reproduce1) Enable Stereo on your Linux OS
2) Open Nuke
3) Read in the attached footage, and Press Replace Views in the Views dialog
4) Connect the Read node to the Viewer
5) Right click on the Viewport, Stereo Modes > And OpenGL Stereo should be an option, but it does not appear

Nuke 11+

Nuke 10.5-
WorkaroundUse Nuke 10.5 or earlier, or Nuke 11 on Windows or Mac
Reproduced by supportThis bug has been reproduced in:
Nuke 11.1v3 - CentOS 6.9
Nuke 11.1v1 - CentOS 6.9
Nuke 11.0v4 - CentOS 6.9
Nuke 11.0v1 - CentOS 6.9 -
regressionUnable to reproduce bug in:
Nuke 11.1v3 - Windows 10 - Mac OSX 10.13
Nuke 10.5v7 - CentOS 6.8
Earliest version testedNuke 10.5v7 - This issue no longer appears in this version and has regressed
Expected behaviourFor the OpenGL Stereo option to be available for stereo footage on Linux
Actual behaviourThe option was not available