Refining earlier change (#214). It turns out that Xvfb's GL behavior on Linux differ depending on whether there is actual graphic hardware or entirely headless. The Apple GL settings works on Xvfb on my computer (AMD Radeon R5 Graphics), but fails in github headless CI.
Refining earlier change (#214). It turns out that Xvfb's GL behavior on Linux differ depending on whether there is actual graphic hardware or entirely headless. The Apple GL settings works on Xvfb on my computer (AMD Radeon R5 Graphics), but fails in github headless CI.
Fixes #266