If I type as root, xorgconfig ,I get a 'command not found' error.
In /etc/X11/xorg.conf (I am trying to change my monitor res to 1280x1024) I have added the "1280x1024" references as follows:-

# Screen sections
# **********************************************************************

# Any number of screen sections may be present. Each describes
# the configuration of a single screen. A single specific screen section
# may be specified from the X server command line with the "-screen"
# option.
Section "Screen"
Identifier "Screen 1"
Device "VESA Framebuffer"
Monitor "My Monitor"

# If your card can handle it, a higher default color depth (like 24 or 32)
# is highly recommended.

# DefaultDepth 8
# DefaultDepth 16
DefaultDepth 24
# DefaultDepth 32

# "1024x768" is also a conservative usable default resolution. If you
# have a better monitor, feel free to try resolutions such as
# "1152x864", "1280x1024", "1600x1200", and "1800x1400" (or whatever your
# card/monitor can produce)

Subsection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480" "1280x1024"
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480" "1280x1024"
EndSubsection
Subsection "Display"
Depth 24
Modes "1024x768" "800x600" "640x480" "1280x1024"
EndSubsection
Subsection "Display"
Depth 32
Modes "1024x768" "800x600" "640x480" "1280x1024"
EndSubsection
Can someone tell me what I should be doing here?

try putting 1280x1024 before the other resolutions, make it the first resolution.

maybe as root; vi /etc/X11/xorg.conf , then in Depth 24 =
Modes "1280x1024" "1024x768" "800x600" "640x480" ......maybe having your highest resolution at the end of the string is not a good idea.

xorgconfig works fine on my slackware boxes (su - to root access)do not forget the -

If you are not on slackware your calls might be different .

You can also change your resolution in kde control center . hope this helps

Well using the "-" allowed me to get in.
Now I can't boot up, it hangs at...Starting up X11 Session Manager.

How on earth did I do this?

Here is the changed /etc/X11/x.conf now...


# File generated by XFdrake (rev 62599)

# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "Files"
# font server independent of the X server to render fonts.
FontPath "unix/:-1"

# minimal fonts to allow X to run without xfs
FontPath "/usr/share/fonts/misc:unscaled"
EndSection

Section "Extensions"
Option "Composite"
EndSection

Section "ServerFlags"
#DontZap # disable <Crtl><Alt><BS> (server abort)
#DontZoom # disable <Crtl><Alt><KP_+>/<KP_-> (resolution switching)
AllowMouseOpenFail # allows the server to start up even if the mouse does not work
EndSection

Section "Module"
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "extmod"
Load "type1"
Load "freetype"
Load "glx" # 3D layer
EndSection

Section "InputDevice"
Identifier "Keyboard1"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbOptions" "compose:rwin"
EndSection

Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
EndSection

Section "InputDevice"
Identifier "Mouse2"
Driver "evdev"
Option "product" "0x0714"
Option "HWheelRelativeAxisButtons" "7 6"
Option "vendor" "0x045e"
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Dell"
ModelName "Dell 1905FP (Analog)"
HorizSync 30.0-81.0
VertRefresh 56.0-76.0

# Monitor preferred modeline (60.0 Hz vsync, 64.0 kHz hsync, ratio 5/4)
ModeLine "1280x1024" 108 1280 1328 1440 1688 1024 1025 1028 1066 +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 "device1"
VendorName "nVidia Corp."
BoardName "NVIDIA GeForce 6 Series"
Driver "nv"
Option "DPMS"
EndSection

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

Subsection "Display"
Depth 8
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 15
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 16
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection

Subsection "Display"
Depth 24
Modes "1280x1024" "1152x864" "1024x768" "832x624" "800x600" "640x480" "480x360" "320x240"
EndSubsection
EndSection

Section "ServerLayout"
Identifier "layout1"
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
InputDevice "Mouse2" "SendCoreEvents"
Screen "screen1"
EndSection