[INFO] multi-gpu scenario

[__- -__]

Hi,

I am trying to a way we can have a desktop performance compared to
windows/macos on linux where system is optimus-enhanced (nvidia) focused.

I have read about off-screen mesa. So ubuntu has gl_dispatcher strategy,
why not make osmesa defaults and let gl_dispatcher take care of relative
device (nvidia, amd, nvidia) when optimus-enhanced is in set.

On-demand nvidia-prime profile runs Xorg nvidia's vram, ok?
an alternative config says intel/nvidia as default opengl ...

Maybe osmesa (off-screen mesa) default background, when optimus-enhanced is
needed/set, should communicate gl_dispatcher and decision what device take
control could be set. I think it is a good strategy together with envvars.

We could have hybrid-profile (nvidia-prime on-demand) in addition to
powersave (intel/amd) amd performance (nvidia-only)

For testing i have set:
LIBGL_ALWAYS_SOFTWARE=1
GALLIUM_DRIVER=softpipe/llvmpipe

And desktop lag was terrible

Thx

Luiz
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