Text and VGA Cursor interfering with graphics mode

From: videoman (linux_at_relocate.demon.co.uk)
Date: 01/29/05

  • Next message: Paolo Peruzzi: "Matrox P 750" 
    Date: 28 Jan 2005 15:53:18 -0800

    Hi

    I am developing a driver for the AMD (Ex NS) SC1200 Geode processor
    using the Durango API. The PC boots up to a graphics console. From
    within the console I launch my graphics application. The screen goes
    blank clearing the console and any data written to the frame buffer is
    then displayed in its full glory in my selected graphics mode. This
    is where the problems begin... Even though the console is no longer
    visible, when text is output via stdio, it corrupts the frame buffer
    and consequently my graphical rendering. This also applies to when
    the mouse is moved.
    Is there a way of preventing both stdio and mouse movements from
    operating on the framebuffer during the graphical session?
    I have tried booting up to a text console, a graphics console and even
    launching my app from the virtual console in x windows.
    The one Durango call "gfx_set_cursor_enable" doesn't appear to work,
    although my guess is that this enables/disables a graphics cursor
    rather than my VGA typpe block cursor.

    Any ideas would be appreciated.

    videoman.

  • Next message: Paolo Peruzzi: "Matrox P 750"

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