--- Comment #6 from Jason A. Donenfeld <> ---
Looks like you need to use GL_NV_robustness_video_memory_purge. From an NVIDIA

"This is probably the result of a quirk of the way the nvidia driver manages
memory for "volatile" data like framebuffer objects. The contents of FBOs are
not preserved across VT switches, which includes suspend and resume. Recent
drivers support an extension called GL_NV_robustness_video_memory_purge that
applications can use to be notified when they need to re-render FBO contents."

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