Hi,

When I connect an external monitor to my Dell
Inspiron 8000 laptop, I'm not able to set the resolution
for the external monitor.  The laptop screen is 1400 x 1050,
and the external monitor accepts 1600 x 1200, but the
laptop always drives it at 1400 x 1050.

/etc/X11/XF86Config contains only ONE Modeline:
# 1600x1200 @ 60Hz, 75.00 kHz hsync
Modeline "1600x1200"  162   1600 1664 1856 2160  1200 1201 1204 1250 +HSync +VSync


/etc/X11/XF86Config-4 contains:
Section "Screen"
        Identifier "Screen0"
        Device "ATI Rage 128 Mobility"
        Monitor "DELL 2000FP"
        DefaultDepth 24
        Subsection "Display"
                Depth 24
                Modes "1600x1200"
        EndSubSection
EndSection

Before I startx, both the laptop and external monitor work well.
But after I issue startx, the external monitor switches off
and the resolution somehow changes to 1400 x 1050.
When I Fn-F8 to switch the external monitor back on,
it's at 1400 x 1050.

Why does this even work at 1400 x 1050?
Is the Modeline ignored?
How can I get the external monitor running at 1600 x 1200?

I'm running Redhat 7.2 (with XFree 4.1) on a Dell Inspiron
8000, with a Pentium.  It has an ATI Rage 128 Mobility with
16 MB ram.  In Xconfigurator I chose only ONE resolution:
1600 x 1200 at 24 bit color, and then edited the XF86Config
file to remove all other Modelines.

Many many thanks for any hints!

Steve Sullivan
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