The following files listed are:

xorg.conf    xrandr    ddcprobe    get-edid|parse-edit


# sudo gedit /etc/X11/xorg.conf
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Emulate3Buttons"	"true"
EndSection

Section "Device"
	Identifier	"Radeon 8500"
        Driver          "ati"
        BusID           "PCI:1:0:0" 
	Option          "XAANoOffscreenPixmaps"
EndSection

Section "Monitor"
	Identifier	"acer x193w"
        Option          "DPMS"
        HorizSync       30-81
        VertRefresh     55-76
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"acer x193w"
	Device		"Radeon 8500"
        DefaultDepth    24
        SubSection "Display"
                Depth           24
                Modes           "1440x900"
        EndSubSection
EndSection

Section "ServerLayout"
	Option          "AIGLX"         "true"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
EndSection
Section "Extensions"
EndSection

Section "DRI"
        Mode 0666
EndSection
        
Section "Extensions"
        Option "Composite" "Enable"
EndSection



# xrandr -q
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 1440 x 1200
VGA-0 connected 1440x900+0+0 (normal left inverted right x axis y axis) 408mm x 255mm
   1440x900       59.9 +   75.0*    59.9  
   1280x1024      74.9     75.0     59.9  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  




# sudo ddcprobe
vbe: VESA 2.0 detected.
oem: ATI RADEON 8500
memory: 131072kb
mode: 800x600x16
mode: 1024x768x16
mode: 320x200x32k
mode: 320x200x64k
mode: 320x200x16m
mode: 1600x1200x256
mode: 640x400x256
mode: 640x480x256
mode: 640x480x32k
mode: 640x480x64k
mode: 640x480x16m
mode: 1600x1200x32k
mode: 800x600x256
mode: 800x600x32k
mode: 800x600x64k
mode: 800x600x16m
mode: 1600x1200x64k
mode: 1024x768x256
mode: 1024x768x32k
mode: 1024x768x64k
mode: 1024x768x16m
mode: 1280x1024x256
mode: 1280x1024x32k
mode: 1280x1024x64k
mode: 1280x1024x16m
mode: 132x25 (text)
mode: 132x43 (text)
edid: 
edid: 1 3
id: 0006
eisa: ACR0006
serial: 74300a36
manufacture: 43 2007
input: sync on green, analog signal.
screensize: 40 25
gamma: 2.070000
dpms: RGB, active off, no suspend, no standby
timing: 720x400@70 Hz (VGA 640x400, IBM)
timing: 720x400@88 Hz (XGA2)
timing: 640x480@60 Hz (VGA)
timing: 640x480@67 Hz (Mac II, Apple)
timing: 640x480@72 Hz (VESA)
timing: 640x480@75 Hz (VESA)
timing: 800x600@60 Hz (VESA)
timing: 800x600@72 Hz (VESA)
timing: 800x600@75 Hz (VESA)
timing: 832x624@75 Hz (Mac II)
timing: 1024x768@87 Hz Interlaced (8514A)
timing: 1024x768@70 Hz (VESA)
timing: 1024x768@75 Hz (VESA)
timing: 1280x1024@75 (VESA)
ctiming: 1280x1024@75
ctiming: 1280x1024@60
ctiming: 1440x1440@75
ctiming: 1440x1440@60
dtiming: 1440x900@69
monitorserial: LAM080264200
monitorrange: 30-83, 55-75
monitorname: Acer X193W



# sudo get-edid|parse-edit
get-edid: get-edid version 1.4.1

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
	Function supported
	Call successful

	VBE version 200
	VBE string at 0x11110 "ATI RADEON 8500"

VBE/DDC service about to be called
	Report DDC capabilities

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
	Function supported
	Call successful

	Monitor and video card combination does not support DDC1 transfers
	Monitor and video card combination supports DDC2 transfers
	0 seconds per 128 byte EDID block transfer
	Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
	Read EDID

	Performing real mode VBE call
	Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
bash: parse-edit: command not found
	Function supported
	Call successful


Acer website list the following cause
Problem:

Issue
"Input not supported" message
Solution

When a monitor displays "Input not supported", the display resolution is set too high. To resolve this, change the resolution to a supported resolution of the monitor.

Issue
"Input Out of Range" message
Solution

The "Input is out of range" message may be caused by the refresh rate of the monitor being set too high.