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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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ariot
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  • Did you try installing Ubuntu using wubi installer? https://wiki.ubuntu.com/WubiGuide – Meintjes Apr 29 '13 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 '13 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 '13 at 12:02
  • Here's a Link i found... [Win7 UEFI Dual boot](http://askubuntu.com/questions/193144/dual-boot-uefi-windows-7-and-ubuntu-12-04-both-64-bits-w7-entry-doesnt-appea) – Meintjes Apr 29 '13 at 12:20
  • And another... This looks promising :) [LINK](http://en.community.dell.com/owners-club/alienware/f/3746/p/19461328/20161438.aspx) – Meintjes Apr 29 '13 at 12:24
  • Someone has similar problem, but there's an answer: http://askubuntu.com/questions/287352/ubuntu-13-04-amd64-installation-does-not-detect-windows-7 – user31389 Apr 29 '13 at 13:44
  • thanks MrSeed I followed the steps written in the first link u mentioned and it worked like a charm. Thanks guys for suggesting solutions. – ariot Apr 30 '13 at 06:51

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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 :)

user31389
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