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  • AJA Video Systems

    Solution for jerky/lagged output

    Posted by Jonathan Capra on January 15, 2008 at 6:45 pm

    I just thought I would share for others’ reference… AJA Tech Support just helped me solve a problem where our MacPro with Leopard running AJA Kona LHe version 5.0 drivers was outputting jerky and lagged video (both thru analog and SDI outputs) while video in the Canvas window was smooth.

    There is an Expansion Slot Utility for the MacPro located in System/Library/CoreServices/

    This allows the bandwidth allocated to each PCI slot to be configured. It was set to the default, which is the first option – x16 Lane Graphics Slot + One x8 and Two x1 Lane Slots. In my situation, it needed to be set to ‘x16 Lane Graphics Slot + Two x4 Lane and One x1 Lane Slot’ in order to give enough bandwidth to the Kona card (in Slot 3).

    Jonathan Capra replied 18 years, 3 months ago 2 Members · 2 Replies
  • 2 Replies

  • Andrew Huebscher

    January 19, 2008 at 8:21 pm

    I’m also having some lag issues, but when I go to open this utility, I get a dialogue that says: “Expansion Slot Utility is not intended to run on this system.”

    Is there another trick for making it work?

    Thanks,
    Andrew

  • Jonathan Capra

    January 21, 2008 at 2:19 pm

    What system are you running? AJA told me the utility is specifically for the MacPro towers. So if you are using another machine, it might not apply.

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