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  • 1.  GXT135P - LAI_DMA_ENABLE

    Posted Tue March 14, 2006 11:01 AM

    Originally posted by: HajoEhlers


    Hi,
    we have a GXT135P in p615 running AIX 5.1
    The display is updated slowly in high resolution mode.

    An APAR mentioned this behavioure regdarding AIX 5.2 and 5.3 so hopefully the solution will fit for AIX 5.1 also.
    But the question is:
    What is meaned by:
    > By defining the environment variable, LAI_DMA_ENABLE,

    Just creating an entry in the /etc/environment ?
    like
    LAI_DMA_ENABLE=""

    tia
    Hajo
    <Extract> from the APAR Y82599
    Y82599: UTILIZE DMA ON THE GXT135 GRAPHICS ADAPTER
    ...
    It was determined that utilizing the previously unused DMA
    feature of the GXT135P adapter for large blits would
    significantly reduce the bus latency added by the architecture
    change. By defining the environment variable, LAI_DMA_ENABLE,
    this feature will be turned on.
    ...
    </Extract>
    #AIX-Forum


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