Some issues about bumblebee and NVIDIA support

[Vincent Cheng]

Hi Asuka,

On Sat, May 9, 2015 at 4:57 AM, Asuka Aria <butterflyonleft at gmail.com> wrote:
> Hi Maintainer,
> I have some problem with bumblebee. When I run `optirun <program>`, I got
> the error
> [ERROR]Cannot access secondary GPU - error: [XORG] (EE) /dev/dri/card0:
> failed to set DRM interface version 1.4: Permission denied
> [ERROR]Aborting because fallback start is disabled.
>
> -- System information
> Debian Release: jessie
> Architecture: amd64 (x86_64)
> $ uname -a
> Linux host 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3-deb8u1 (2015-04-24)
> x86_64 GNU/Linux
>
> -- Packages version
> Bumblebee: 3.2.1-7
> Primus: 0~20140711-1
> xerserver-xorg-video-nouveau: 1:1.0.11-1
>
> -- Graphics
> Using Inter HD 4600 and Nvidia GTX 950M with i7 4720HQ.
>
> $ lspci | egrep 'VGA|3D'
> 00:02.0 VGA compatible controller: Inter Corporation 4th Gen Core Processor
> Integrated Graphics Controller (rev 06)
> 01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 950M] (rev a2)
>
> I have trie to install the driver from `aptitude install nvidia-driver`, but
> after I could not get into the system. At first, I installed the
> "bumblebee-nvidia" package, but I also get the ERROR mentioned above.Attach
> my /var/log/Xorg.8.log.
>
> What could I do?

First off, would you like to use nvidia or nouveau? I can't tell
which, because you mention that you've installed nvidia-driver, but
your Xorg.8.log says that you're actually trying to use nouveau?

Can you elaborate on what happened after you installed nvidia-driver
("could not get into the system")? A common mistake I see users doing
is running nvidia-xconfig or manually creating their own xorg.conf and
explicitly specifying the nvidia driver; don't do that on systems
running intel+nvidia, because the intel gpu is the one driving your
primary X server, not nvidia.

Regards,
Vincent