Hi there i have dual booted Xubuntu 12.10 along side Win XP. GRUB doesnt appear on my LCD 17" LG display leaving a message that "Out of Range 46.4 KHz". I tried connecting to friend's display which works just fine. I googled it and found the way to change the resolution of GRUB to 1280x1024.
When i try to edit the file under /etc/default/grub am unable to save the changes as i do not have the root access.
I dont know what to do Thank you