I purchased a new Dell 15R laptop which came with pre installed windows 8 64 bit and ueifi boot. I made a ubuntu 12.10 dvd and loaded it. When i started installing my installer could not recognise any other windows 8 or any other OS installed. When i moved to advanced partition tool, i could see my free space, my windows partitions. But i did not proceed. can anyone help.
I had a similar problem with my laptop that came with Windows 8. It turned out there were both GPT and MBR partition tables, which was confusing the installed (and gparted). Follow these steps:
Boot Live CD, don't choose the install option, choose test out Ubuntu.
Open a shell and type sudo sgdisk --zap /dev/sda
Where sda is the disk with the Windows partition. It'll complain about partition problems, but this is ok.
Proceed with your Ubuntu installation.
I had a similar problem with my Dell XPS 8500 desktop. I found the following bug report helpful:
The workaround suggested there worked for me. Run ubiquity (the Ubuntu installer) with the following command:
Slightly more detailed instructions, if they are needed:
The Ubuntu installer should then detect your Windows 8 installation (it did for me).
The problem appears to be with os-prober, the command used by ubiquity to detect installed operating systems. You can test this by running first