[Solved] libvirtError: Unable to read from monitor: Connection reset by peer

Problem :
Error starting domain: Unable to read from monitor: Connection reset by peer

Solution:

 virsh edit <domainname>

Search these word:  <graphics type='vnc' port='-1' autoport='yes'/>

Delete it and save .

After that start vm again is ok.
Good luck :) !

Nguyen Si Nhan