Bug#756522: bumblebee-nvidia: cannot access secondary gpu - error: Permission denied

[Vincent Cheng]

Hi,

Sorry for the late reply!

On Wed, Nov 26, 2014 at 3:34 AM, theo <debianbts at theocrite.org> wrote:
> Package: bumblebee
> Version: 3.2.1-7
> Followup-For: Bug #756522
>
> Hello,
>
>
> I'm also affected by this bug.
[...]
> [  1536.440] (II) NOUVEAU driver Date:   Thu Aug 28 03:57:48 2014 +0200
> [  1536.440] (II) NOUVEAU driver for NVIDIA chipset families :
> [  1536.440]    RIVA TNT        (NV04)
> [  1536.440]    RIVA TNT2       (NV05)
> [  1536.440]    GeForce 256     (NV10)
> [  1536.440]    GeForce 2       (NV11, NV15)
> [  1536.440]    GeForce 4MX     (NV17, NV18)
> [  1536.440]    GeForce 3       (NV20)
> [  1536.440]    GeForce 4Ti     (NV25, NV28)
> [  1536.440]    GeForce FX      (NV3x)
> [  1536.440]    GeForce 6       (NV4x)
> [  1536.440]    GeForce 7       (G7x)
> [  1536.440]    GeForce 8       (G8x)
> [  1536.440]    GeForce GTX 200 (NVA0)
> [  1536.440]    GeForce GTX 400 (NVC0)
> [  1536.440] (--) using VT number 1
>
> [  1536.440] (EE) [drm] KMS not enabled
> [  1536.440] (EE) No devices detected.
> [  1536.440] (EE)
> Fatal server error:
> [  1536.440] (EE) no screens found(EE)
> [  1536.440] (EE)
> Please consult the The X.Org Foundation support
>          at http://wiki.x.org
>  for help.

First off, does your nvidia GPU fit into any of the above
nouveau-supported families? If it's a fairly recent nvidia GPU, it may
simply not be supported by nouveau, in which case you'll either have
to use the proprietary nvidia driver, or perhaps try upgrading to a
more recent kernel to see if nouveau now supports your GPU. The other
error message that concerns me in your X log is "[drm] KMS not
enabled"; did you somehow disable KMS (e.g. nomodeset,
nouveau.modeset=0 or similar on your grub command line)? If so, you'll
want to undo that.

Alternatively, if nouveau still does not detect your nvidia GPU, try
editing /etc/bumblebee/xorg.conf.nouveau and manually specify a BusID
in that file, then restart bumblebeed? (refer to the comments there
for a brief howto)

Regards,
Vincent