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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - GT650M and Nouveau - NOUVEAU(0): [drm] failed to set drm interface version."
href="https://bugs.freedesktop.org/show_bug.cgi?id=91051#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - GT650M and Nouveau - NOUVEAU(0): [drm] failed to set drm interface version."
href="https://bugs.freedesktop.org/show_bug.cgi?id=91051">bug 91051</a>
from <span class="vcard"><a class="email" href="mailto:emil.l.velikov@gmail.com" title="Emil Velikov <emil.l.velikov@gmail.com>"> <span class="fn">Emil Velikov</span></a>
</span></b>
<pre>Seems like the short version was too brief, here is a longer one:
Bumblebee likes to disable/pull out the card from under the kernel driver to
safe power. On the userspace it uses a form of GL/GLX proxy.
If you're using recent kernel/mesa you don't need any part for Bumblebee, as
the kernel driver will automatically power up/down the device. On the
userspace, use $DRI_PRIME=1 glxgears to start glxgears with the "other"
(nvidia) card, or just $glxgears to use the integrated (intel) one.
nouveau.runpm=0 disables the automatic power up/down. You might want to
experiment if things work without it.</pre>
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