https://bugs.freedesktop.org/show_bug.cgi?id=79688

--- Comment #12 from poma <pomidorabelis...@gmail.com> ---

Some of the results with recent Mesa 3D on Optimus/Prime


# xrandr --listproviders 
Providers: number : 1
Provider 0: id: 0x48 cap: 0xb, Source Output, Sink Output, Sink Offload crtcs:
4 outputs: 5 associated providers: 0 name:Intel

# cat /sys/kernel/debug/vgaswitcheroo/switch 
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:01:00.0

# lspci | egrep -i vga\|3d
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 740M] (rev a1)

# LIBGL_DEBUG=verbose vblank_mode=0 DRI_PRIME=1 glxgears
...

DIS powering up:

# cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynPwr:0000:01:00.0


# DRI_PRIME=0 glxinfo | grep "OpenGL renderer"
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile 

# DRI_PRIME=1 glxinfo | grep "OpenGL renderer"
OpenGL renderer string: Gallium 0.4 on NV108

# DRI_PRIME=0 glxinfo | grep "OpenGL vendor string"
OpenGL vendor string: Intel Open Source Technology Center

# DRI_PRIME=1 glxinfo | grep "OpenGL vendor string"
OpenGL vendor string: nouveau

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