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# README for prime-run
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This script replaces bbswitch/bumblebee/primus. Details can be found in the
NVIDIA documentation, see:
http://us.download.nvidia.com/XFree86/Linux-x86_64/525.105.17/README/primerenderoffload.html.

It is intended to be used with the nvidia closed-source drivers. Either nvidia
or nvidia-fb should work.

Use it by calling it before a program, for example:

	$ prime-run glxinfo

It may be necessary to load nvidia kernel modules before starting the X
server, for example like so in /etc/rc.modules:

	/sbin/modprobe nvidia
	/sbin/modprobe nvidia-drm
	/sbin/modprobe nvidia-modeset
	/sbin/modprobe nvidia-uvm

If modules are loaded and devices detected correctly, you should be able to
see multiple xrandr providers like so:

	$ xrandr --listproviders
	Providers: number : 2
	Provider 0: id: 0x45 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 3 outputs: 4 associated providers: 0 name:modesetting
	Provider 1: id: 0x240 cap: 0x0 crtcs: 0 outputs: 0 associated providers: 0 name:NVIDIA-G0

Example lspci output:

	$ lspci | grep -E 'VGA|3D'
	00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
	01:00.0 3D controller: NVIDIA Corporation GP108M [GeForce MX150] (rev a1)

Example prime-run usage test:

	$ glxinfo | grep 'OpenGL renderer'
	OpenGL renderer string: Mesa Intel(R) UHD Graphics 620 (KBL GT2)
	$ prime-run glxinfo | grep 'OpenGL renderer'
	OpenGL renderer string: NVIDIA GeForce MX150/PCIe/SSE2