Crashing when opening the 3dmap or crash after sleeping/screensaving the computer - read this

[robbyxp1]

1. On some laptops with both APUs and GPUs, it appears to pick the APU for EDD by default.

So to fix it, see https://www.howtogeek.com/351522/how-to-choose-which-gpu-a-game-uses-on-windows-10/ to tell windows to use the GPU for EDD.

Some openGL implementations seem buggy on a per graphics card basis (I'm looking at you AMD and at APUs). This is beyond our control.

2. Sleeping or screensaving the computer with the 3dmap open seems sometimes prone to the opengl drivers crashing on resume. It is not recommended to sleep or let screen save with the 3dmap open.

symptoms include:

==== BEGIN ====
OpenTK.Graphics.GraphicsContextException: Failed to make context 131072 current. Error: 0
at OpenTK.Platform.Windows.WinGLContext.MakeCurrent(IWindowInfo window) in C:\Users\juliu\Documents\GitHub\opentk\src\OpenTK\Platform\Windows\WinGLContext.cs:line 279