2 монитора, Lenovo z585 и AMD

 xrandr --output VGA1 --mode 1280x1024 --right-of LVDS1

xrandr --output VGA1 --mode 1280x768 --right-of LVDS1

warning: output VGA1 not found; ignoring

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384
LVDS connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
   1366x768       60.0*+
   1280x720       59.9  
   1152x768       59.8  
   1024x768       59.9  
   800x600        59.9  
   848x480        59.7  
   720x480        59.7  
   640x480        59.4  
VGA-0 connected (normal left inverted right x axis y axis)
   1024x768       60.0 +   75.1     70.1  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
HDMI-0 disconnected (normal left inverted right x axis y axis)

rognar@Z585:~$ xrandr --output LVDS --primary --mode 1366x768 --pos 0x0 --output VGA-0 --mode 1024x768 --pos -1024x0