From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jacek Konieczny <jajcus@jajcus.net>
Subject: Re: Only one CPU core detected when booting on UEFI
Date: Sat, 22 Dec 2012 22:27:20 +0100
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To: Xiao-Long Chen <chenxiaolong@cxl.epac.to>
Cc: daniel.kiper@oracle.com, xen-devel@lists.xen.org, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On Sat, Dec 22, 2012 at 01:54:07PM -0500, Xiao-Long Chen wrote:
 
> I rebooted into xen.efi to make sure that it still reported:
> 
> (XEN) ACPI: RSDP BABFE014, 0024 (r2 LENOVO)
> 
> then I changed my xen.efi config to this: http://paste.kde.org/629996/raw/
> which, unfortunately, still causes the hang.

Have you tried 'acpi_rsdp=0xbabfe014' instead of 'acpi_rsdp=babfe014'?

Do you have the kernel console output from the failed boot with these
settings?

Also, I don't think 'video=vesa:off vga=normal' options make much sense
under EFI and Xen.

Greets,
        Jacek