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[Hunk Cui <Hunk.Cui@xxxxxxx>]

    Through compare the ‘fading’ option and ‘not fading’ option, print
the Xserver and Geode-driver debugging information on the SSH terminal.
I found the ‘fading’ option trigger the Geode-driver (lx_display.c ->
lx_crtc_gamma_set function), but the ‘not fading’ option does not
trigger this function.

            I had a test, the following change:

static void

lx_crtc_gamma_set(xf86CrtcPtr crtc, CARD16 * red, CARD16 * green,

    CARD16 * blue, int size)

{

    unsigned int dcfg;

    int i;


            DebugP("lx_crtc_gamma_set /by Hunk\n");

#if 0

    assert(size == 256);


    for (i = 0; i < 256; i++) {

            unsigned int val = (*red << 8) | *green | (*blue >> 8);


            df_set_video_palette_entry(i, val);

    }

    /* df_set_video_palette_entry automatically turns on

     * gamma for video - if this gets called, we assume that

     * RandR wants it set for graphics, so reverse cimarron

     */

    dcfg = READ_VID32(DF_DISPLAY_CONFIG);

    dcfg &= ~DF_DCFG_GV_PAL_BYP;

    WRITE_VID32(DF_DISPLAY_CONFIG, dcfg);

#endif
}

    After re-make the Geode-driver, when I run the ‘fading’ option, the
client program ( xscreensaver ) also print the debugging information
about “fading…/ fading done”, now the screensaver is properly display.
So through the test, I am sure that the main reason is upper function
(lx_crtc_gamma_set).

The ‘not display screensaver’ bug reason was found.

I will follow it….


** Changed in: xserver-xorg-video-geode (Ubuntu)
       Status: Incomplete => Confirmed

-- 
Geode driver not display Screensaver
https://bugs.launchpad.net/bugs/570584
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