ya he mirado configuraciones de pantalla y no va bien ninguna
como se mira cual es mi pantalla?
pero con windows esta misma pantalla si que me va bien
por cierto que es el X akal?

# 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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 "Device" 
   Identifier      "Configured Video Device"
   Driver      "sis671"
EndSection

Section "Monitor"
Identifier   "Configured Monitor"
                 HorizSync 59.81
                 VertRefresh 60.0
EndSection

Section "Screen"
        Identifier   "Default Screen"
        Monitor      "Configured Monitor"
   Device      "Configured Video Device"
   DefaultDepth    24
EndSection

esto es lo que tengo escrito y aqui esto no veo yo que se inicie como tiene que ser

haber he puesto esto y lo unico que cambia esk al iniciarse esta la pantalla un centimetro hacia arriba
# 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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 "Device" 
   Identifier  "Configured Video Device"
   Driver      "sis671"
EndSection

Section "Monitor"
   Identifier   HorizSync 59.81
VertRefresh 60.0
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Monitor      "Configured Monitor"
   Device      "Configured Video Device"
   DefaultDepth    24
EndSection

el primer comando que me mandaste lo unico que ha echo es agrandarme la pantalla a lo ancho y bajarme el contraste por lo que estoy peor que antes

escribiendolo como me has dicho arriba me sale esto:
# 1024x968 59.81 Hz (CVT) hsync: 60.11 kHz; pclk: 81.75 MHz
Modeline "1024x968_60.00"   81.75  1024 1088 1192 1360  968 971 981 1005 -hsync +vsync

y escribiendo xrar -s0 me sale esto otro:
usage: xrandr [options]
  where options are:
  -display <display> or -d <display>
  -help
  -o <normal,inverted,left,right,0,1,2,3>
            or --orientation <normal,inverted,left,right,0,1,2,3>
  -q        or --query
  -s <size>/<width>x<height> or --size <size>/<width>x<height>
  -r <rate> or --rate <rate> or --refresh <rate>
  -v        or --version
  -x        (reflect in x)
  -y        (reflect in y)
  --screen <screen>
  --verbose
  --dryrun
  --nograb
  --prop or --properties
  --fb <width>x<height>
  --fbmm <width>x<height>
  --dpi <dpi>/<output>
  --output <output>
      --auto
      --mode <mode>
      --preferred
      --pos <x>x<y>
      --rate <rate> or --refresh <rate>
      --reflect normal,x,y,xy
      --rotate normal,inverted,left,right
      --left-of <output>
      --right-of <output>
      --above <output>
      --below <output>
      --same-as <output>
      --set <property> <value>
      --scale <x>x<y>
      --transform <a>,<b>,<c>,<d>,<e>,<f>,<g>,<h>,<i>
      --off
      --crtc <crtc>
      --panning <w>x<h>[+<x>+<y>[/<track:w>x<h>+<x>+<y>[/<border:l>/<t>/<r>/<b>]]]
      --gamma <r>:<g>:<b>
      --primary
  --noprimary
  --newmode <name> <clock MHz>
            <hdisp> <hsync-start> <hsync-end> <htotal>
            <vdisp> <vsync-start> <vsync-end> <vtotal>
            [+HSync] [-HSync] [+VSync] [-VSync]
  --rmmode <name>
  --addmode <output> <name>
  --delmode <output> <name>

gracias por todo

usage: cvt [-v|--verbose] [-r|--reduced] X Y [refresh]

 -v|--verbose : Warn about CVT standard adherance.
 -r|--reduced : Create a mode with reduced blanking (default: normal blanking).
            X : Desired horizontal resolution (multiple of 8, required).
            Y : Desired vertical resolution (required).
      refresh : Desired refresh rate (default: 60.0Hz).

Calculates VESA CVT (Coordinated Video Timing) modelines for use with X.

eso es lo que me sale al meter cvt 1024x968

y:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 240, current 800 x 600, maximum 960 x 600
default connected 800x600+0+0 0mm x 0mm
   960x600        60.0 
   960x540        60.0 
   800x600        60.0*    56.0 
   768x576        60.0 
   720x576        60.0 
   856x480        60.0 
   800x480        60.0 
   720x480        61.0 
   640x480        60.0 
   400x300        60.0 
   320x240        61.0 
eso es lo que me sale al meter xrandr

esta igual lo que es el entorno,solo que ahora se me ha desplazado para arriba la pantalla y me sobra como 1 cm por debajo(ya lo he arreglado lo del desplazamiento con el mando de la television)

# 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.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# 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 "Device"
   Identifier   "Configured Video Device"
   Driver      "vesa671"
EndSection

Section "Monitor"
   Identifier   "Configured Monitor"
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Monitor      "Configured Monitor"
   Device      "Configured Video Device"
   DefaultDepth    24
EndSection
yo aqui no veo nada diferente

y donde puedo mirar esos parametros? y luego donde los escribo? en el xorg.conf?

entonces que ctv escribo?