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Crossfire problems on HD3450/3200 using jaunty

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  • Crossfire problems on HD3450/3200 using jaunty

    2.6.28-11-generic
    fglrx 2:8.600-0ubuntu1

    Second monitor is activated by xrandr --output CRT1 --right-of CRT2

    ~$ aticonfig --lsa
    * 0. 02:00.0 ATI Radeon HD 3450
    1. 01:05.0 ATI Radeon HD 3200 Graphics

    * - Default adapter
    ~$ aticonfig --lsch

    CrossFire chain for adapter 0, status: disabled
    0. 02:00.0 ATI Radeon HD 3450
    1. 01:05.0 ATI Radeon HD 3200 Graphics

    If I enable crossfire using sudo aticonfig --adapter=0 --cf=on
    I lose the ability to add the second monitor, the gamma settings in VLC change and I see no change is glxgears fps.

    In general, the display quality is much better than the open source driver.

    Is this the right way to get crossfire started?

    Some more aticonfig info:
    $ aticonfig --adapter=0,1 --od-getclocks

    Adapter 0 - ATI Radeon HD 3450
    Core (MHz) Memory (MHz)
    Current Clocks : 300 400
    Current Peak : 600 400
    Configurable Peak Range : [300-650] [400-450]
    GPU load : 1%
    ERROR - Get clocks failed for Adapter 1 - ATI Radeon HD 3200 Graphics

    $ aticonfig --adapter=0,1 --od-gettemperature

    Adapter 0 - ATI Radeon HD 3450
    Sensor 0: Temperature - 58.00 C
    ERROR - Get temperature failed for Adapter 1 - ATI Radeon HD 3200 Graphics

  • #2
    Take all this with a grain of salt because I haven't played with CF on Linux at all, but...

    1. I didn't think Crossfire supports displays on both of the GPUs when running in Crossfire mode.

    2. Running glxgears probably is not useful for testing Crossfire; firstly, I'm not sure that glxgears even gets spread across the GPUs, and secondly the kind of processing required by glxgears isn't likely to benefit from dual GPUs anyways. You probably want to run one of the games known to benefit from Crossfire (quake-y/doom-y type games).

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