Ok people I am looking for someone with a tad bit more knowledge and experience than I have here. I have a dual monitor setup (NOT in clone mode) and everything has been working great! But, now my big monitor has faint rolling horizontal lines through it, I haven't changed anything in my xf86config-4 file to cause this change. Could I be over driving that monitor? Any help on this would be great, my eyes get so tired looking at this. The monitor I am having the problem with is the Samsung. Here's part of my xf86config-4 file.

Section "Monitor"
Identifier "monitor0"
VendorName "Samsung"
ModelName "Samsung SyncMaster 21GLs"
HorizSync 30.0-85.0
VertRefresh 50.0-160.0

# Sony Vaio C1(X,XS,VE,VN)?
# 1024x480 @ 85.6 Hz, 48 kHz hsync
ModeLine "1024x480" 65.00 1024 1032 1176 1344 480 488 494 563 -hsync -vsync

# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630

# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Acer"
ModelName "Acer 56e"
HorizSync 30.0-69.0
VertRefresh 50.0-110.0

# Sony Vaio C1(X,XS,VE,VN)?
# 1024x480 @ 85.6 Hz, 48 kHz hsync
ModeLine "1024x480" 65.00 1024 1032 1176 1344 480 488 494 563 -hsync -vsync

# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630

# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Device"
Identifier "device0"
BoardName "NVIDIA GeForce4 (generic)"
Driver "nv"
BusID "PCI:0:11:0"
Option "DPMS"
EndSection

Section "Device"
Identifier "device1"
VendorName "nVidia Corporation"
BoardName "RIVA TNT2"
Driver "nv"
BusID "PCI:1:0:0"
Option "DPMS"
EndSection

Section "Screen"
Identifier "screen0"
Device "device0"
Monitor "monitor0"
DefaultColorDepth 24

Subsection "Display"
Depth 8
Virtual 1024 768
EndSubsection

Subsection "Display"
Depth 15
Virtual 1024 768
EndSubsection

Subsection "Display"
Depth 16
Virtual 1024 768
EndSubsection

Subsection "Display"
Depth 24
Virtual 1024 768
EndSubsection
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultColorDepth 24

Subsection "Display"
Depth 8
Virtual 800 600
EndSubsection

Subsection "Display"
Depth 15
Virtual 800 600
EndSubsection

Subsection "Display"
Depth 16
Virtual 800 600
EndSubsection

Subsection "Display"
Depth 24
Virtual 800 600
EndSubsection
EndSection

Section "ServerLayout"
Identifier "layout2"
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
Screen "screen0" 0 0
Screen "screen1" Rightof "screen0"
EndSection

Ok, I got it fixed now. Seems as though one of my lil ones (children) helped themselves to adjusting my resolution all on their own....lol Ctrl-Alt-+ three times cleared up all the lines............ hope it helps someone else too...............lol

ok people, how do i keep my settings at what ever it uses when i do the ctrl-alt-+ to fix this problem, when i reboot i have to do it all over again..........any ideas?