title: Octave: warning: opengl_renderer: Error 1286 occurred in init_gl_context
body: <p>Every time I try plotting in Octave, I receive this error:</p>
  
  <pre><code>warning: opengl_renderer: Error 1286 occurred in init_gl_context
  warning: called from
      __line__ at line 128 column 1
      line at line 56 column 8
      __plt__&gt;__plt2vv__ at line 502 column 10
      __plt__&gt;__plt2__ at line 248 column 14
      __plt__&gt;__plt1__ at line 207 column 10
      __plt__ at line 119 column 17
      plot at line 223 column 10
  warning: opengl_renderer: Error 1286 occurred drawing 'line' object
  warning: called from
      __plt__ at line 120 column 34
      plot at line 223 column 10
  </code></pre>
  
  <p>I've tried all the different forums with recommendations for how to eliminate these warnings, but they keep appearing. Any recommendations? </p>