opengl, opengl-es on Ubuntu 12.04 LTS v2.1

Discussion in 'Troubleshooting' started by pav, Mar 12, 2014.

  1. pav

    pav New Member

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    Hello,

    When trying to run Opengl Opengl-es tests (glxgears, glmark2, glmark2-es2 ) I get always a black screen.

    With glxgears:
    It is possible to see the frames per second information (between 200 and 280 FPS) with glxgears in the terminal, but the graphic window remains always black.

    With glmark2:
    I can see the information about OpenGL:
    vendor: Vivante Corporation
    renderer: GC2000 Graphics engine
    Version: 2.1 2.0.1
    and the text information about the benchmarks carried out, but the graphic window is black again.

    With glmark2-es2:
    vendor: Vivante Corporation
    renderer: GC2000 Graphics engine
    Version: OpenGL ES 2.0
    And again the text on the terminal shows info about the benchmarks...but the graphic window again black.

    My configuration is:
    - Udoo Quad
    - Power supply (the power supply offered in Udoo shop)
    - SD card , class 10. with Ubuntu 12.04 Lts 2.1
    - Keyboard, mouse and a monitor using HDMI to DVI cable 1680 x 1050 pixels.
    - Network connection using rj-45.
    - The camera module is connected.

    Any hint??. :shock:
     
    pav, Mar 12, 2014
    #1
  2. pucherd

    pucherd New Member

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    I have the same problem. Any hints please?
     
    pucherd, Mar 31, 2014
    #2
  3. pucherd

    pucherd New Member

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    I solved it!

    #install openbox
    sudo apt-get install openbox

    #log out
    switch to GNOME/Openbox and log in.

    After that run the es2gears and it should be displayed (it work at 150 FPS :shock: ).
     
    pucherd, Apr 1, 2014
    #3
  4. pav

    pav New Member

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    Hi! thanks for the help!.

    It works with openbox as you describe. With other desktops Unity, GNOME, it doesn't.

    The performance is aprox. the same (between 130 ans 145 FPS)...

    Thanks again!
     
    pav, Apr 2, 2014
    #4
  5. dendrite

    dendrite New Member

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    Hi, I have the same problem, which may also correlate with an error I receive when trying to run a package that requires OpenGL (full), PsychoPy:
    libgl error: UNIX signal already caught

    Do you think the openbox install will solve this problem too?

    In other words, why does openbox work for glxgears and is this a problem with openGL in the other desktop environments, or just a problem with the actual display after the gears 3D render?

    Probably the latter because glxgears doesn't actually throw the same libgl error, so I think I will still have the same problem after openbox install...
    (thinking out loud)
     
    dendrite, Jun 2, 2014
    #5
  6. Arvid Terzibaschian

    Arvid Terzibaschian New Member

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    Arvid Terzibaschian, Aug 4, 2015
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