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Thread: Unity 3D limits dual monitor resolution

  1. #1
    Join Date
    Jan 2009

    Unhappy Unity 3D limits dual monitor resolution

    After upgrading from 12.10 to 13.10 the resolution across dual monitors must be reduced if it is greater than 2400ish.
    After installing the gnome-flashback, the desired resolution was obtained on 13.10.

    Perhaps we all know about this or perhaps this is the wrong place for this post? I wasn't able to find anything about it.

    It turned out my good monitor was stuck in a fairly low-res mode due to this Unity 3d restriction. One monitor is the laptop screen and is shaped differently. This was not a problem for unity 2d on 12.10. After installing unity 2d on 13.10 nothing changed as far as I could tell but perhaps I goofed.

    The resolutions currently in use are 1280 x 800 and 1280 x 1024. It seems unity 3d was apparently unhappy with 2560 across the two screens.

  2. #2
    Join Date
    Mar 2006
    Williams Lake
    Ubuntu Development Release

    Re: Unity 3D limits dual monitor resolution

    Resolution is dependent on your video driver, what make graphics chipset and and driver are you using?

  3. #3
    Join Date
    Jan 2009

    Re: Unity 3D limits dual monitor resolution

    ~ % lsmod | grep video
    video 19318 1 i915
    ~ % lspci | grep VGA
    00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
    ~ %

    fyi: High res (more than 2400 pix across two monitors) worked under Unity 2d on 12.10 and works using 13.10 (same install) when the genome-flashback window manager is used instead of Unity. When I log in there are only two choice, flashback and unity even though Unity2d is installed.


    log # /usr/lib/nux/unity_support_test -p
    OpenGL vendor string: Intel Open Source Technology Center
    OpenGL renderer string: Mesa DRI Intel(R) 945GM
    OpenGL version string: 1.4 Mesa 9.2.1

    Not software rendered: yes
    Not blacklisted: yes
    GLX fbconfig: yes
    GLX texture from pixmap: yes
    GL npot or rect textures: yes
    GL vertex program: yes
    GL fragment program: yes
    GL vertex buffer object: yes
    GL framebuffer object: yes
    GL version is 1.4+: yes

    Unity 3D supported: yes

    % printenv DESKTOP_SESSION

    There's probably something I need to do to enable Unity2D which is missing.

  4. #4
    Join Date
    Dec 2004
    Ubuntu Mate 15.10 Wily Werewolf

    Re: Unity 3D limits dual monitor resolution

    Your GPU probably has a max texture size of 2048x2048, so you wont be able to use a composited desktop wider (or taller than that). One possible work around is to arrange the vertically rather than horizontally.


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