This is Manorath. I tried all the options explained in the help page regarding uefi mode when I boot my sony vaio which already contain windows 8 in uefi mode when I am using the ubuntu cd as my first boot it is not detecting the os in the cd it is giving error like "no os found" .
So I request you to give any solution on this problem. And also I am unable to install ubuntu inside windows 8. if it is getting installed then at the time of booting when I select the ubuntu then it is giving some memory error.
Plz help on this topic.