I am using a Toshiba laptop with an ati radeon graphics card. I have installed ubuntu 12.04 via wubi. I am trying to output to my external display which has a native resolution of 1280x768, but it is being recognised as an unknown display and limited to 1024x768. I have installed all updates and the additional drivers section in the system settings says there are no proprietary drivers available.
When I use the much discussed cvt and xrandr method I get this:
~$ xrandr
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 8192 x 8192
VGA-0 connected (normal left inverted right x axis y axis)
1024x768 60.0
800x600 60.3 56.2
848x480 60.0
640x480 59.9
HDMI-0 disconnected (normal left inverted right x axis y axis)
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
1280x800 60.0*+
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
DIN disconnected (normal left inverted right x axis y axis)
~$ cvt 1280 768
# 1280x768 59.87 Hz (CVT) hsync: 47.78 kHz; pclk: 79.50 MHz
Modeline "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
~$ xrandr --newmode "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
~$ xrandr
Screen 0: minimum 320 x 200, current 2304 x 800, maximum 8192 x 8192
VGA-0 connected 1024x768+1280+32 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*
800x600 60.3 56.2
848x480 60.0
640x480 59.9
HDMI-0 disconnected (normal left inverted right x axis y axis)
LVDS connected primary 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
1280x800 60.0*+
1280x720 59.9
1152x768 59.8
1024x768 59.9
800x600 59.9
848x480 59.7
720x480 59.7
640x480 59.4
DIN disconnected (normal left inverted right x axis y axis)
1280x768_60.00 (0x2da) 79.5MHz
h: width 1280 start 1344 end 1472 total 1664 skew 0 clock 47.8KHz
v: height 768 start 771 end 781 total 798 clock 59.9Hz
~$ xrandr --addmode vga-0 1280x768_60.00
xrandr: cannot find output "vga-0"
Even though xrandr tells me that vga-0 is connected, if I try any commands with vga-0 it tells me that it cannot find output vga-0
I am a complete n00b so please bear with me.
Any advice would be much appreciated.
