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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [dri3] Latest git breaks PRIME Offloading to Nouveau GPU"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79688#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [dri3] Latest git breaks PRIME Offloading to Nouveau GPU"
href="https://bugs.freedesktop.org/show_bug.cgi?id=79688">bug 79688</a>
from <span class="vcard"><a class="email" href="mailto:pomidorabelisima@gmail.com" title="poma <pomidorabelisima@gmail.com>"> <span class="fn">poma</span></a>
</span></b>
<pre>
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</pre>
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