Re: GX1-CS5530 sound problem !!!

From: Jürgen Querengässer (msg1000_at_web.de)
Date: 06/15/04

  • Next message: Ramesh: "Re: What linux Os for a Pc/104 board?" 
    Date: Tue, 15 Jun 2004 08:18:04 +0200

    Tech Support for IDE-CF wrote:
    > We found that if you are running heavy sound I/O, i.e. mp3 and video
    > at the same time, the geode interrupt stack gets confused.
    >
    > The conflict is inside the geode companion chip, there is nothing you
    > can do about it.
    >
    > Our solution is to put it in graphic mode (even for simple text
    > display) for mp3. X appears to have less latency than the Geode's
    > Virtual VGA system. However, it does take up much more system memory.
    > On the plus side, system memory seems to be faster than the bios
    > memory anyway.

    Hi 'Tech Support for IDE-CF',

    I'm interested in how did you find this.

    I would like to know how I can provoke such behaviour. My app. also needs
    much CPU time and has to serve much interrupts and does video output.
    (Video uses the VESA-framebuffer device and afaik it doesn't need an
    interrupt. Furthermore the video memory is shared with the system memory
    (also in the virtual VGA mode [I think]) and should not slower or faster
    than X (unless X uses hardware acceleration; but this is possible in
    VEAS-mode, too.)

  • Next message: Ramesh: "Re: What linux Os for a Pc/104 board?"