[Bug 267421] graphics/drm-510-kmod i915kms freeze with Skylake (Intel HD graphics 520) on 13.1-STABLE n252850-6b2bbf4ecaa

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267421

--- Comment #14 from Dominic Fandrey <kami@freebsd.org> ---
(In reply to Emmanuel Vadot from comment #13)

They cannot, they can just coexist, so you get one on DISPLAY :0.0 and DISPLAY
:0.1. You have to pick what you run on which display (you can even run
different DMs on each one), there is no moving stuff between displays. It's
mightily inconvenient. It's like having two Xorg instances in a single process.
You can even bind different input devices to each one etc.

What doesn't work is to use one as a GPUDevice for the other and thus use their
inputs and outputs as sources/sinks, which would be much more convenient. I.e.
if that worked (like it does on Linux supposedly), I'd relegate the IGPU to
being a sink just to drive the internal display and have all the rendering
performed by the NVIDIA GPU.

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