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I just bought a Lenovo y500 and freshly installed Windows 7-32 bit, which is working fine. Now I am trying to install Ubuntu 12.04 with dual boot. But it's not detecting Windows 7 and shows the whole disk as empty.

Boot info

Please help me.

Solution: Followed the steps mentioned in here

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  • Did you try installing Ubuntu using wubi installer? wiki.ubuntu.com/WubiGuide
    – Meintjes
    Apr 29, 2013 at 11:51
  • thanks for the prompt reply. its written there that wubi doesn't work with pc using UEFI firmware. And my laptop is using UEFI firmware
    – ariot
    Apr 29, 2013 at 11:57
  • yeah right, my bad. Try and Partition the disk in Windows and then install Ubuntu on the new Partition.
    – Meintjes
    Apr 29, 2013 at 12:02
  • Here's a Link i found... Win7 UEFI Dual boot
    – Meintjes
    Apr 29, 2013 at 12:20
  • And another... This looks promising :) LINK
    – Meintjes
    Apr 29, 2013 at 12:24

1 Answer 1

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Well, it says stuff like:

=================== UEFI/Legacy mode:
This live-session is not EFI-compatible.
EFI in dmesg.

Maybe it was booted in legacy mode and not in EFI mode? It also says:

Warning: /dev/sda contains GPT signatures, indicating that it has a GPT table.
However, it does not have a valid fake msdos partition table, as it should.
Perhaps it was corrupted -- possibly by a program that doesn't understand GPT
partition tables.  Or perhaps you deleted the GPT table, and are now using an
msdos partition table.  Is this a GPT partition table?

Maybe something is broken? Or it's only a side effect of not booting in EFI mode?

Please someone, convert this answer into a comment :)

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