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On a new computer build, I installed 12.04 Desktop 64bit from a usb stick. When I rebooted, it hangs. It writes "Grub" on the upper left and then nothing else.

The bios setup program has boot options for "efi: [hard drive id]" and "[hard drive id]". They both result in a hung boot.

Any ideas on why its hanging and how I should change it?

Details...

During the install I removed the old hard disk partitions and created the following partitions. 40GB ext4 used for ubuntu 12.04 root 40GB empty (I plan to install windows 7 later) 4GB swap 80GB fat32 (for data accessible from ubuntu and windows).

Hardware is... GIGABYTE GA-Z77X-UD3H Intel Core i7-3770 2x 8GB RAM 160 SATA hard drive

--BobG

Update: I booted Ubuntu Live, installed the Boot-repair PPA, ran it and it fixed the boot problem.

I also think I now know why this happened. I did manual partitioning (i.e. the "Something else" option) and I did not pay much attention to the dropdown box near the bottom. I now realize that that box determines where the boot loader goes. I think I had it set to the wrong partition.

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Usually Installing Windows first and Ubuntu Later is recommended. –  tijybba Jul 1 '12 at 5:23
    
Try reinstalling grub from your live usb stick. –  tijybba Jul 1 '12 at 5:50
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