Have you checked the mode lines in your /etc/X11/XF86Config or
/etc/X11/XF86Config-4? In the "Screen" section (near the bottom), you
should see stanzas like this:
Subsection "Display"
Depth 8
Modes "640x480" "800x600" "1024x768" "1280x1024"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "640x480" "800x600" "1024x768" "1280x1024"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1280x1024" "640x480" "800x600" "1024x768"
ViewPort 0 0
EndSubsection
In the stanza for your DefaultDepth, what's the first (default) mode?
In my case, I default to a color depth of 24 bpp. In the 24 bpp stanza,
the default (first) mode is 1280x1024 for my 21" monitor. I saw the
problem you're describing when an installation of Red Hat defaulted to a
mode of 1154x800 (or something like that). Change the default mode to
something more standard, like 1280x1024 or 1024x768, depending on your
monitor. Then restart X. Good luck,
Hidong
Massimo Alonzo wrote:
>
> Hi,
>
> My Matrox G400 makes images in my monitor not stable (slightly
> flickering) and this happens only when I use Linux.
>
> I tryed to check its configuration using xvidtune and I found the same
> settings used by Windows .... :-(
>
> > xvidtune
>
> Num hsync: 1, Num vsync: 1
> hsync range 0: 30.00 - 70.00
> vsync range 0: 50.00 - 120.00
>
> Horizontal Sync (KHz): 68.68
> Vertical Sync (Hz) : 85.00
>
> How can I improve performances?
>
> I use RH72 and my monitor (well recognized) is a Sampo Alphascan711
>
> Thanks in advance
>
> Massimo
>
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