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When trying to install Xubuntu 13.10, it always stops at

xubuntu ubiquity:  Setting up grub-efi-amd64-signed (1.22.1+2.00-19ubuntu2.1) ...

It's just stuck there. Nothing is happening, although I can continue to use the USB live mode as I am typing this post right. I am installing from a USB drive booted into UEFI because I want to dual-boot with Win 7 Pro x64, so switching to Legacy BIOS mode is out of the question unfortunately. I don't have any encrypted partition or drive.

Does anyone have any pointers how I could overcome this?

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If you can find a log file with more details (check under /root; you'll need to use sudo to do so), that may give you some clues.

Beyond that, you can manually install any EFI boot loader you like. The easiest to install are likely to be GRUB 2 from Ubuntu's repository (but your problem indicates this might not be so easy) and rEFInd. In the case of rEFInd, it's likely to be easiest to start with the USB flash drive or CD-R image. If you can boot to Linux using that, then installing the Debian-package version should get rEFInd working as your default boot manager.

A variant on the GRUB 2 installation option is to run Boot Repair. This will install a fresh copy of GRUB on the computer, so it's essentially another way to re-install GRUB.

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That was me above. Thanks for your reply, Rod. I would like to provide more info but I don't have the nerve to poke around any longer today. I am confused by this. Maybe it's because of my partitions? /sda6 is located before sda2, physically speaking. sda1 is that hidden MS partition thing. Also: For the installation, I added an additional biosgrub partition before sda4 with a size of 150 MB as you explained somewhere on here. Configuring for /home and new / was easy actually. – henry Dec 8 '13 at 20:24
I can say that I have a little bit of experience with rEFInd, so I actually inquired about rEFInd already, see here but nothing came of it. I wonder, people using rEFInd for any *buntu-version, do they let GRUB2 install itself (if it works) and then install rEFInd later? I'd like to skip GRUB2, but I guesstimate that it is impossible because of its integration, right? – henry Dec 8 '13 at 20:25
Physical partition ordering not matching partition numbers is irrelevant. Whenever discussing partitions, it's critical that you provide actual output from parted, gdisk, or some other partitioning tools; verbal summaries are imprecise and invariably omit critical information. A bios_grub partition is not needed on EFI-based computers, and should be more like 1MiB in size. – Rod Smith Dec 9 '13 at 0:46
The output of parted -l: – henry Dec 9 '13 at 11:35
I don't see anything obviously wrong with your partition table. Please try the advice I gave in my answer -- namely, to install another boot loader or boot manager. – Rod Smith Dec 9 '13 at 22:46

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