Ubuntu desktop 12.04 and virtualbox - is it possible to set mobile resolution ? ( e.g. 1440x2560 )

I installed ubuntu desktop 12.04 with guest additions on virtualbox.
I try to set resolution with custom /etc/X11/xorg.conf config.

Section "Device" Identifier "Device0" Driver "vboxvideo"
EndSection
Section "Monitor" Identifier "Monitor0"
EndSection
Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" SubSection "Display" Modes "1440x2560" EndSubSection
EndSection

The problem is the following:
Ubuntu allows me to set resolution like "2560x1440", but does not accept resolution like "1440x2560".

It is possible to "hack" this?
Thank you.

1 Answer

I fixed the problem)

New xorg.conf:

Section "Device" Identifier "Device0" Driver "vboxvideo"
EndSection
Section "Monitor" Identifier "VGA-0" Modeline "1440x2560_60.00" 318.00 1440 1568 1720 2000 2560 2563 2573 2651 -hsync +vsync Option "PreferredMode" "1440x2560_60.00"
EndSection
Section "Screen" Identifier "Screen0" Device "Device0" Monitor "VGA-0" DefaultDepth 24 SubSection "Display" Modes "1440x2560_60.00" EndSubSection
EndSection

Also notice that Monitor Identifier changed from "Monitor0" to "VGA-0".
If i don't use identifier "VGA-0" -> config does not work.