is xorg.conf responsible for measuring the complete behaviour of screen at boot time, if any other file then which. My default depth 24 & mode 1024*768. when i boot system sometime desktop screen doesn't fit into moniter space area therfore see all desktop by mouse move up & down, left & right . My xorg.conf is

# Xorg configuration created by system-config-display

Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, a font server independent of the X server is
# used to render fonts.
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"

### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LG StudioWorks 55i"
DisplaySize 280 210
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 30.0 - 54.0
VertRefresh 50.0 - 90.0
Option "dpms"
EndSection

Section "Device"
Identifier "Videocard0"
Driver "i810"
VendorName "Videocard vendor"
BoardName "Intel Corporation 82865G Integrated Graphics Controller"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 16
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

Section "DRI"
Group 0
Mode 0666
EndSection

your xorg.conf looks fine to me, so I'm not sure why you're getting this behaviour.

One thing you can do is add
to your desktop's startup programs, which will set the display resolution to 1024x768 everytime your desktop (be it KDE/Gnome/XFCE/etc) starts.


Every once in a while I find a game that changes the screen resolution and doesn't change it back on exit, leaving me with the behaviour you described. Is it possible something else is running that would mess up your resolution?

change

VertRefresh 50.0 - 90.0

to

VertRefresh 60.0

That'll fix it (probably)

Hi hollywoodb i doning this behaviour due display error comes in desktop, when display mode select 85 refresh rate automatically after boot then desktop doesn't fit into moniter area after then i can't perform any work & my job hampered. by default my option is 1024*768 at 60 hz but it select sometimes 1024*768 at 85 hz. in diaplay dialoug refresh rate show only one option either 85 or 60 hz then how will change . no any option at that time except reboot & wait util it trues(e.g. select default mode).