xorg.conf

sudo cp /var/log/Xorg.0.log /var/log/Xorg.1.log && sudo Xorg -configure :1
в домашнем каталоге появится xorg.conf.new
gtf 1280 1024 60
для вставки в "Monitor"
После - внесение изменений в подсекцию Дисплей секции Скрин... Итоговый xorg.conf
Section "ServerLayout"
Identifier     "X.org Configured"
Screen      0  "Screen0" 0 0
InputDevice    "Mouse0" "CorePointer"
InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath   "/usr/lib/xorg/modules"
FontPath     "/usr/share/fonts/X11/misc"
FontPath     "/usr/share/fonts/X11/cyrillic"
FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
FontPath     "/usr/share/fonts/X11/Type1"
FontPath     "/usr/share/fonts/X11/100dpi"
FontPath     "/usr/share/fonts/X11/75dpi"
FontPath     "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
FontPath     "built-ins"
EndSection

Section "Module"
Load  "record"
Load  "dbe"
Load  "extmod"
Load  "dri"
Load  "dri2"
Load  "glx"
EndSection

Section "InputDevice"
Identifier  "Keyboard0"
Driver      "kbd"
EndSection

Section "InputDevice"
Identifier  "Mouse0"
Driver      "mouse"
Option     "Protocol" "auto"
Option     "Device" "/dev/input/mice"
Option     "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
#DisplaySize   320   240 # mm
Identifier   "Monitor0"
VendorName   "STN"
ModelName    "SAMTRON"
HorizSync    30.0 - 71.0
VertRefresh  50.0 - 160.0
#Option     "DPMS"
Modeline "1280x1024_60.00"  108.88  1280 1360 1496 1712  1024 1025 1028 1060  -HSync +Vsync
EndSection

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
        ### <percent>: "<f>%"
        ### [arg]: arg optional
        #Option     "NoAccel"            # [<bool>]
        #Option     "SWcursor"           # [<bool>]
        #Option     "Dac6Bit"            # [<bool>]
        #Option     "Dac8Bit"            # [<bool>]
        #Option     "BusType"            # [<str>]
        #Option     "CPPIOMode"          # [<bool>]
        #Option     "CPusecTimeout"      # <i>
        #Option     "AGPMode"            # <i>
        #Option     "AGPFastWrite"       # [<bool>]
        #Option     "AGPSize"            # <i>
        #Option     "GARTSize"           # <i>
        #Option     "RingSize"           # <i>
        #Option     "BufferSize"         # <i>
        #Option     "EnableDepthMoves"   # [<bool>]
        #Option     "EnablePageFlip"     # [<bool>]
        #Option     "NoBackBuffer"       # [<bool>]
        #Option     "DMAForXv"           # [<bool>]
        #Option     "FBTexPercent"       # <i>
        #Option     "DepthBits"          # <i>
        #Option     "PCIAPERSize"        # <i>
        #Option     "AccelDFS"           # [<bool>]
        #Option     "IgnoreEDID"         # [<bool>]
        #Option     "CustomEDID"         # [<str>]
        #Option     "DisplayPriority"    # [<str>]
        #Option     "PanelSize"          # [<str>]
        #Option     "ForceMinDotClock"   # <freq>
        #Option     "ColorTiling"        # [<bool>]
        #Option     "VideoKey"           # <i>
        #Option     "RageTheatreCrystal" # <i>
        #Option     "RageTheatreTunerPort" # <i>
        #Option     "RageTheatreCompositePort" # <i>
        #Option     "RageTheatreSVideoPort" # <i>
        #Option     "TunerType"          # <i>
        #Option     "RageTheatreMicrocPath" # <str>
        #Option     "RageTheatreMicrocType" # <str>
        #Option     "ScalerWidth"        # <i>
        #Option     "RenderAccel"        # [<bool>]
        #Option     "SubPixelOrder"      # [<str>]
        #Option     "ClockGating"        # [<bool>]
        #Option     "VGAAccess"          # [<bool>]
        #Option     "ReverseDDC"         # [<bool>]
        #Option     "LVDSProbePLL"       # [<bool>]
        #Option     "AccelMethod"        # <str>
        #Option     "DRI"                # [<bool>]
        #Option     "ConnectorTable"     # <str>
        #Option     "DefaultConnectorTable" # [<bool>]
        #Option     "DefaultTMDSPLL"     # [<bool>]
        #Option     "TVDACLoadDetect"    # [<bool>]
        #Option     "ForceTVOut"         # [<bool>]
        #Option     "TVStandard"         # <str>
        #Option     "IgnoreLidStatus"    # [<bool>]
        #Option     "DefaultTVDACAdj"    # [<bool>]
        #Option     "Int10"              # [<bool>]
        #Option     "EXAVSync"           # [<bool>]
        #Option     "ATOMTVOut"          # [<bool>]
        #Option     "R4xxATOM"           # [<bool>]
        #Option     "ForceLowPowerMode"  # [<bool>]
        #Option     "DynamicPM"          # [<bool>]
        #Option     "NewPLL"             # [<bool>]
        #Option     "ZaphodHeads"        # <str>
Identifier  "Card0"
Driver      "radeon"
BusID       "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device     "Card0"
Monitor    "Monitor0"
DefaultDepth   24
SubSection "Display"
  Depth      1
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
SubSection "Display"
  Depth      4
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
SubSection "Display"
  Depth      8
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
SubSection "Display"
  Depth      15
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
SubSection "Display"
  Depth      16
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
SubSection "Display"
  Depth      24
  Modes      "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480" "1x1"
EndSubSection
EndSection