If it is what I think, this is a common problem which is simple to fix.
The Dom0 is grabbing all the memory, leaving none for your video device.
Limiting the Dom0 memory should take care of the problem.
In /boot/grub/menu.lst, add "dom0_mem=930M" to the end of the kernel
line and reboot.
The value I used will probably work, but you should adjust it for your
system.
Good luck,
Steve.
On Wed, 2010年07月07日 at 08:05 -0400, Lowell S Middleton wrote:
>
> I downloaded and ran the live CD
> fromhttp://wiki.xensource.com/xenwiki/LiveCD which worked fine on a
> Lenovo, Intel Core 2CPU 6300@xxxx GHz with 1GB of ram and 80 GB disk
> space. The next step was to recreate a working version on this
> machine.
>
> The machine originally had CentOS 32bit installed, Xen from the
> distribution did not work. I noticed that Xen on the LiveCD was based
> upon Debian (lenny), so I replaced the CentOS with lenny and applied
> the Xen from the distribution.
>
> xen-linux-system-2.6.26.2-xen - resulted in error when boot and xen
> kernel selected.
> ERROR:
> xf86MapVidMem: Could not mmap framebuffer (0xd0000000,0x80000)
> (Invalid argument)
>
> Build Operating System: Linux Debian (xorg-server 2:1.4.2-10.lenny2)
> Current Operating System: Linux localhost.localdomain
> 2.6.26-2-xen-amd64 #1
>
> This was a disappointment as I was attempting to demonstrate ease of
> use/application and stand up a small development environment based
> upon OpenSource products.
>
> TIA - Scott M.
>
>
>
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