Xen users - Jul 2010 - Xen LiveCD

I downloaded and ran the live CD from 
http://wiki.xensource.com/xenwiki/LiveCD  which worked fine on a Lenovo,  
Intel Core 2CPU 6300@1.86 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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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, 2010-07-07 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@1.86 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. 
> 
> 
> 
> This is a PRIVATE message. If you are not the intended recipient,
> please delete without copying and kindly advise us by e-mail of the
> mistake in delivery. 
> NOTE: Regardless of content, this e-mail shall not operate to bind CSC
> to any order or other contract unless pursuant to explicit written
> agreement or government initiative expressly permitting the use of
> e-mail for such purpose.
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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