Dual boot UEFI Windows 7 and Ubuntu 12.04 (both 64 bits). W7 entry doesn't appear in GRUB

Posted by Joe on Ask Ubuntu See other posts from Ask Ubuntu or by Joe
Published on 2012-09-26T11:10:52Z Indexed on 2012/10/02 3:56 UTC
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After trying to install both OS during 2 days, I'm confused and getting mad... I have SSD 128 GB and HDD 500 GB both empty. My laptop is Asus K55VM. BIOS support UEFI.

What I have done:

  1. Install new SSD (Samsung 830 128GB)

  2. Use GParted on liveCD to create new table of partitions (GPT) and create 3 partitions (in the SSD) for different purposes:

    • Partition 1: 80 GB (w7);
    • Partition 2: 30 GB (Ubuntu 12.04 -Just / -);
    • Partition 3: 10 GB unused (for future extesion of the other partitions)
  3. Install Windows 7 (with UEFI) in Partition 1. This create:

    • /dev/sda1 -> 100 MB for System (UEFI boot I guess) - FAT32
    • /dev/sda2 -> 100 MB aprox. for MSR
    • /dev/sda3 -> 79.800 MB aprox. for Windows7 data

In this point everything works fine. I have W7. Now I install Ubuntu 12.04 amd64 (with UEFI) as follows:

  1. Install / in Partition 2 -> /dev/sda4 30 GB ext4, and in the hdd I install /home and swap.

  2. I select bootloader in /dev/sda1 (where it's supposed to be the UEFI boot).

  3. I install updates and reboot.

Problem: Now just appears grub menu with Ubuntu entries and not Windows 7.

Alternative solution found: When I turn on laptop, before loading GRUB I press ESC key and appear BIOS boot, so I can select to boot the Windows partition, Ubuntu partition, DVD, USB, etc... but I think is not the best way to boot different OS.

I've tried: sudo update-grub2 with no success.

What can I do??

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