I was Enjoying my Dell 2405fpw 1920x1200 Res. a little too much and decided to take the resolution setting to the highest level (1600x1200), now the screen blanks out and gives an error message saying that it can't handle the resolution. I tried going into xorg.conf and editing the Modes line and removed the "1600x1200" res option but to no avail. The system still boot up with screen problems. I know I'm on the right track in getting this resolved but I could use a little help in fine tunning my efforts, thanks.

D22

What distribution are you using? Some like Fedora have tools to help with that.

Did you edit the right line in xorg, it would be the line with you default depth.

Section "Screen"
Identifier "Screen 1"
Device "** Intel i810 (generic) [i810]"
Monitor "My Monitor"
DefaultDepth 16

Subsection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection

You can also decrease your default depth temporarily to get up and running. Then use one of your distros tools to fix it.

If all else fails run as root
and reset the parameters that you want. Change it a few times if you have to until it runs the way you want it to.

Backup your X config file somewhere in case you mess it up so that you can restore it.
/etc/X11/xorg.conf

Good luck

I picked up the modelines from the Suse forum. It worked ok for Fedora 4, Dell 2405FPW display on an opteron system.
--------
[root@localhost X11]# more xorg.conf

# XFree86 4 configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"

# RgbPath is the location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "unix/:7100"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "glx"
Load "record"
Load "freetype"
Load "type1"
Load "dri"
EndSection

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# Or if you just want both to be control, use:
# Option "XkbOptions" "ctrl:nocaps"
#
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"
EndSection

Section "Monitor"
DisplaySize 520 330
Identifier "Monitor[0]"
VendorName "DEL"
ModelName "DELL 2405FPW"
HorizSync 30-81
VertRefresh 56-76
Option "DPMS"
Modeline "1920x1200_60.00" 154 1920 1968 2000 2080 1200 1203 1209 1235 +
HSync -VSync
Modeline "1680x1050_60.00" 147.14 1680 1784 1968 2256 1050 1051 1054 10
87 -HSync +Vsync
EndSection

Section "Device"
Identifier "Videocard0"
Driver "vesa"
VendorName "Videocard vendor"
BoardName "VESA driver (generic)"
EndSection

Section "Screen"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1920x1200_60.00" "1680x1050_60.00"
EndSubSection
Device "Videocard0"
Identifier "Screen0"
Monitor "Monitor[0]"
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection