[ipxe-devel] iPXE ISO fails to boot on an OpenSource Xen VM

Alessandro Salvatori sandr8 at gmail.com
Wed Oct 5 21:34:14 UTC 2011

when you make ipxe, tell it to throw in all the debugs possible...

basically debug=$(find src -name '*.c' | sed 's/\.c$//)

actually, minus the last comma, but i am too lazy to write something
better right now :)

 Here i am, A young man,
 A crashing computer program,
 Here is a pen, write out my name...

(from: The Servant - Orchestra)

On Wed, Oct 5, 2011 at 14:31, Charles Watt <cwatt at racemi.com> wrote:
> Yes.  This comes off a VM running on a Xen 3.1.2 system from about 2007.
> I've tested with Xen 3.4.3, and 4.1.1 and do not have this issue.
> Unfortunately, the infrastructure that I need to deploy is on the older
> system and it will not be upgraded any time soon.
> Line 1 of the main program prints the "initialising devices ..." message,
> which doesn't get displayed.  So I'm guessing that either:
> 1) the older IsoLinux has trouble and doesn't really load ipxe.krn, or
> 2) there is something in the older Xen's emulation of the console that is
>    causing a problem.
> In either case it doesn't look like I'll get any debugging information
> from the console.
>> On 10/3/2011 11:48, Charles Watt wrote:
>> > I've pulled and built the top of the tree and tested the ipxe.iso on
>> > numerous physical servers, VMware, KVM, HyperV, and Citrix XenServer,
>> > all with success.  But when booted on an OpenSource Xen VM (in KVM
>> > mode) it appears to hang at the "Loading ipxe.krn .......... Ready."
>> > line (see attached image).  Then after a few seconds the VM halts.
>> >
>> > Can anyone give me some suggestions on where to look?  What modules
>> > should I recompile with DEBUG?
>> That message is from Syslinux (ISOLINUX, specifically).  It looks like
>> your Syslinux is pretty old.  Would you consider upgrading it?
>> - Shao Miller
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