Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've installed Windows 8 64 bit on UEFI . Now I want to install Ubuntu 12.10 on UEFI too. I used a usb flash drive to boot in UEFI mode and started install, but in "installation type" screen, it was unable to detect any os. I tried Ubuntu without installing it and:
1. In uefi boot mode, I cannot mount any partition.
2. In Legacy boot mode, I can mount all partitions.
Windows 8 OS partition is primary partition.
Thank you in advance!

share|improve this question
Is it possible you are working with an encrypted partition? If it is encrypted then Ubuntu won't be able to see what is on the disk – David Stinnett Jan 26 '13 at 8:14
I think my partition is not an encrypted partition. I've never use a tool to encrypt my partition.Furthermore, in legacy mode I can mount all partitions. – Duong Jan 26 '13 at 10:10

I have had the same problem. Are you using an SSD? See this guide and the separate post on problems with SSDs here. The comments on those posts might be helpfful as well - it partially depends on the BIOS setup you have.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.