# DomU fail to start - internal error: libxenlight failed

**URL:** <https://forums.suse.com/t/domu-fail-to-start-internal-error-libxenlight-failed/28567>\
**Category:** SLES Virtualization\
**Created:** [August 25, 2016, 12:25am UTC](https://forums.suse.com/t/domu-fail-to-start-internal-error-libxenlight-failed/28567 "2016-08-25T00:25:10Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![clausbc](https://avatars.discourse-cdn.com/v4/letter/c/34f0e0/32.png) [@clausbc](https://forums.suse.com/u/clausbc)\
**Post date:** [August 25, 2016, 12:25am UTC](https://forums.suse.com/t/domu-fail-to-start-internal-error-libxenlight-failed/28567/1 "2016-08-25T00:25:10Z")

</div>

Hi,

my DomU (Windows server on partition disk) fails to start. I haven’t been able to find useful log information - any ideas where to look or start troubleshooting?

The message from virsh:  
error: internal error: libxenlight failed to create new domain ‘loke’

XML:  
  
loke  
88996b20-5954-a211-5c49-e78ab018b98f  
Admistration / workstation  
1048576  
1048576  
1  
  
hvm  
/usr/lib/xen/boot/hvmloader  
  
  
  
  
  
  
  
  
\<on\_poweroff\>destroy\</on\_poweroff\>  
\<on\_reboot\>restart\</on\_reboot\>  
\<on\_crash\>destroy\</on\_crash\>  
  
/usr/lib/xen/bin/qemu-dm

---

<div class="post-metadata">

**Author:** ![clausbc](https://avatars.discourse-cdn.com/v4/letter/c/34f0e0/32.png) [@clausbc](https://forums.suse.com/u/clausbc)\
**Post date:** [August 27, 2016, 4:35pm UTC](https://forums.suse.com/t/domu-fail-to-start-internal-error-libxenlight-failed/28567/2 "2016-08-27T16:35:23Z")

</div>

[QUOTE=clausbc;34056]Hi,

my DomU (Windows server on partition disk) fails to start. I haven’t been able to find useful log information - any ideas where to look or start troubleshooting?

The message from virsh:  
error: internal error: libxenlight failed to create new domain ‘loke’

XML:  
  
loke  
…  
  
/usr/lib/xen/bin/qemu-dm  
  
  
  
  
  
  
…  
[/QUOTE]

Hi,  
I ended up simply undefining the old machine and re-create the DomU from the graphical interface.  
Comparing XML from old and new machine, the changed lines are:

` <emulator>/usr/lib/xen/bin/qemu-system-i386</emulator>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/md11'/>`  
Now the DomU starts and runs without any issues 😃