Changing sub-pixel rendering in Ubuntu 12.04

In older Ubuntu releases one could change the sub-pixel rendering in the system settings, but that option was unfortunately removed in newer releases. Fortunately it is still accessible via gnome settings [1]:

1. Open dconf-editor
2. In the left pane, go to /org/gnome/settings-daemon/plugins/xsettings
3. In the right pane, change the value of the rgba-order key to bgr:

or via command line

gsettings set org.gnome.settings-daemon.plugins.xsettings rgba-order 'bgr'

Resources

[1] How can I change font rendering to sub-pixel BGR ordering?

http://askubuntu.com/questions/98531/how-can-i-change-font-rendering-to-sub-pixel-bgr-ordering