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[SOLVED] Ubuntu 13.04 Grub Prevents BIOS setup and USB boot

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Hello everyone,

I have been recentlty adventuring myself with the installation of Ubuntu in an HP Pavilion Sleekbook 14.
I had successfully installed Ubuntu 12.04 in it (creating a UEFI partition with 200MB in the start of the first non-ssd device, which seemed to be required).

After that, I had tried replacing Ubuntu 12.04 with 13.04, however I forgot to "re-create" (or configure) the UEFI partition, for that installation.
As a result, any time I boot the ultrabook I get a grub command-line, which prevents me from booting pendrive Ubuntu images in order to restore the UEFI partition.
The grub command-line also shows up as I try to get into the BIOS setup screen.

I read in some places that the UEFI partition replaces the BIOS firmware, and that grub is installed in there. Then this gives me these issues.

As I try to manually load a kernel image from the grub command-line (installed in the SSD device - from the previous installation or a USB device),
grub freezes and hangs with further action, which also prevents me from initializing and booting the system from the command-line.

Can anyone help me on this one or had any similar problem?

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