OpenGL, nvidia-driver-304 and permissions issue

[Marc Fonvieille]

Hello,

On a 10.3-R desktop, I've just upgraded the installed packages
to branches/2017Q1.  Since, I'm unable to run OpenGL related
applications as a vanilla user.  Before, I was running ports close
to branches/2016Q1

I have a Nvidia GeForce GTS 450 (x11/nvidia-driver-304, i.e.,
nvidia-driver-304-304.134).

As root, glxgears runs fine.
As a normal user:

% glxgears
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  153 (GLX)
  Minor opcode of failed request:  3 (X_GLXCreateContext)
  Value in failed request:  0x0
  Serial number of failed request:  30
  Current serial number in output stream:  31

I thought about the video group, but I don't have a video group and I
just have /dev/nvidia0 and /dev/nvidiactl, no /dev/dri and such.

Do I have to create the video group and change the group for
/dev/nvidia* (currently, it's wheel)?

For informations:
# glxinfo | head -5
name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4


Excerpts from /etc/X11/xorg.conf:
Section "Module"
    Load           "glx"
    Load           "dri2"
    Load           "extmod"
    Load           "record"
    Load           "dbe"
    Load           "freetype"
    Load           "type1"
EndSection


Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTS 450"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "1440x900 @2880x1800 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection


Thanks for any advice.

-- 
Marc