# Revision history [back]

Hello

I'm on Havana, and following those steps I was not able to save the changes.

To be clear I have added these lines to libvirt.xml

<serial type='tcp'>
<source mode='bind' host='127.0.0.1' service='2223'/>
<protocol type='telnet'/>
<target port='0'/>
<alias name='serial0'/>
</serial>


But after soft rebooting the instance from the Horizon GUI, those lines were not there anymore

Any suggestion ?