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Poor 2D performance with AMD Graphics

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  • #11
    Originally posted by devius View Post
    ...yet. I think Qaridarium is talking about the latest 4.6 beta which should have been released in November.

    @burli

    I have a similar system (Athlon II X4, 785G) and I also don't notice bad 2D performance in my CAD software. I use a different CAD program though - Bricscad. You may want to give QCad a shot as it has awesome 2D performance (on my system) and if you still get bad performance with it then the problem is somewhere in the system. If performance is good then it's Eagle's fault.
    right kde4.6beta

    be sure its a QT problem the 4,5kde do have known speed bugs

    your other cad software simple do not use KDE technique--

    i'm a kde user i know that

    i do not use kde stuff for 1 single app..

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    • #12
      Originally posted by Qaridarium View Post
      be sure its a QT problem the 4,5kde do have known speed bugs
      QT is completly indipendent from KDE. So you don't need to upgrade to KDE-4.6-Beta in order to get a new version of QT4.
      QT has a really bad X11 backend, that could be a problem. I doubt Eagle is using OpenGL, i guess its simply causing software fallbacks by using too advanced QT drawing routines.

      However thats all speculation. Best would be to install debugging-symbols for your whole OSS stack, and use a system-wide profiler like sysprof to see whats really going on behind the scenes.
      Everything else is pure speculation and a waste of time.

      - Clemens

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      • #13
        Originally posted by Linuxhippy View Post
        QT is completly indipendent from KDE. So you don't need to upgrade to KDE-4.6-Beta in order to get a new version of QT4.
        QT has a really bad X11 backend, that could be a problem. I doubt Eagle is using OpenGL, i guess its simply causing software fallbacks by using too advanced QT drawing routines.

        However thats all speculation. Best would be to install debugging-symbols for your whole OSS stack, and use a system-wide profiler like sysprof to see whats really going on behind the scenes.
        Everything else is pure speculation and a waste of time.

        - Clemens
        use an kubuntu 11.04 to test kde 4.6 is a waste of time ?

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        • #14
          It does'nt matter, which Qt Lib is installed. Eagle uses static linked libraries

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          • #15
            Doesn't Qt provide a way to specify a different rendering backend through the commandline? Try toggling between software acceleration, X11, RENDER and OpenGl to see what works best for you.

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