[ubuntu] xrandr add screen resolution

[max_power]

when i go System -> Preferences -> Display

I'm only offered :

1360x768 (16:9)
1152x864 (4:3)

How do i add more screen resolutions?

I tried adding more to /etc/X11/xorg.conf but its not showing up in the options box.

Thanks

[calmario]

Hey man. This will help:

https://wiki.ubuntu.com/X/Config/Resolution

[max_power]

Here are the steps

1. Use xrandr to make sure that the new mode can fit within the maximum framebuffer size

   xrandr | grep maximum

2. Use gtf to create a mode line

   gtf 1440 900 59.9

3. Add new mode using xrandr

   xrandr --newmode "1440x900_59.90"  106.29  1440 1520 1672 1904  900 901 904 932  -HSync +Vsync

4. Add this newly added mode to the desired output (VGA/LVDS etc)

   xrandr --addmode VGA 1440x900_59.90

5. Choose the new mode

   xrandr --output VGA --mode 1440x900_59.90

TO MAKE THE CHANGES PERSISTENT

sudo gedit /etc/X11/xorg.conf

Find this: (yours might look different than from below)
Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
EndSection

and add this to it

DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection

so it should all look similar to this:

Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection
EndSection


MAKE SURE YOU ADD YOUR NEW RESOLUTION TO THE MODES LINE
Modes "1280x1024" "1024x768" "640x480"


Thanks to:
https://wiki.ubuntu.com/X/Config/Res...%20resolutions

http://www.arunviswanathan.com/node/53

[unutbu]

Thank you for the nice write-up.

[nacho_dh]

In case the frame buffer size is a limitation for the resolution you want to add (it happened to me), just modify/create the "Virtual" parameter in the "Display" subsection of your xorg.conf. Here's how mine looks after configuring the frame buffer size to use my 22' widescreen (resol: 1680x1050)...

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	SubSection "Display"
		Virtual	2960 1050
		Depth 24
		Modes "1680x1050" "1280x800"
	EndSubSection
EndSection