Re: OSMesa problems with proprietary NVIDIA 304 drivers on Debian Jessie

[Julien Bect]

Le 14/05/2015 23:13, Andreas Weber a écrit :
> I've created a minimalistic function which shows the problem, detailed 
> infos from my system at the end and build instructions for
> Debian GNU/Linux 8.0 (jessie) amd64 below:
>
> $ apt-get install octave liboctave-dev octave-pkg-dev
>
> My minimalistic example:
> $ wget http://www.tech-chat.de/files/debug-osmesa-octave.tar.gz
> $ tar xzf debug-osmesa-octave.tar.gz
> $ cd debug-osmesa-octave
> $ make
> $ make check
>
> This should create a debug_osmesa.png which is identically to 
> debug_osmesa_reference_image.png

Here is what I get:

$ make check
octave -q -f --no-gui --eval "test debug_osmesa"
glXGetProcAddress​ 0xb3e36240
GL_DEPTH_BITS       = 24
GL_STENCIL_BITS     = -1427721648
GL_ACCUM_RED_BITS   = -1237157654
GL_ACCUM_GREEN_BITS = -1218736132
GL_ACCUM_BLUE_BITS  = 32
warning: your version of GraphicsMagick limits images to 8 bits per pixel
cnt =

   0
   0
   0

  ***** test
 img = debug_osmesa();
 imwrite (img, "debug_osmesa.png");
 assert (size (img), [480 640 3])
 # count ratio of pixels over 20% threshold as fingerprint
 cnt = squeeze (sum ( sum (img>50)) / numel (img) * 3)
 # allow 10% tolerance
 assert (cnt, [0.11259; 0.10842; 0.12163], -0.1)
!!!!! test failed
ASSERT errors for:  assert (cnt,[0.11259; 0.10842; 0.12163],-0.1)

  Location  |  Observed  |  Expected  |  Reason
    (1)           0         0.11259      Rel err 1 exceeds tol 0.1
    (2)           0         0.10842      Rel err 1 exceeds tol 0.1
    (3)           0         0.12163      Rel err 1 exceeds tol 0.1



> my testing system and how I installed the Nvidia driver:

$ uname -a
Linux bect-laptop 3.16.0-37-generic #51-Ubuntu SMP Tue May 5 13:46:54 
UTC 2015 i686 i686 i686 GNU/Linux

$ lsb_release -a
 ... Description:    Ubuntu 14.10

$ apt-cache policy libosmesa6-dev
libosmesa6-dev:
  Installé : 10.3.2-0ubuntu0.1
  Candidat : 10.3.2-0ubuntu0.1
 Table de version :
 *** 10.3.2-0ubuntu0.1 0
        500 http://fr.archive.ubuntu.com/ubuntu/ utopic-updates/main 
i386 Packages
        100 /var/lib/dpkg/status
     10.3.0-0ubuntu3 0
        500 http://fr.archive.ubuntu.com/ubuntu/ utopic/main i386 Packages

$ glxheads
...
  GL_VERSION:  3.3.0 NVIDIA 331.113
  GL_VENDOR:   NVIDIA Corporation
  GL_RENDERER: Quadro FX 880M/PCIe/SSE2