GRUB_CMDLINE_LINUX_DEFAULT="text" is not working
Solution 1:
So, simply run the following in your terminal
echo 'manual' | sudo tee /etc/init/lightdm.override
sudo update-grub
Ref. to the following topic, Ubuntu 11.10 is using lightdm not gdm :
So, simply run the following in your terminal
echo 'manual' | sudo tee /etc/init/lightdm.override
sudo update-grub
Ref. to the following topic, Ubuntu 11.10 is using lightdm not gdm :