Package: linux-headers-4.9.0-8-amd64 I hit into the following bug when creating two VMs with virt-manager configured with spice server. I started them sequentially, first starts but the second fails to spawn with error:
Error starting domain: internal error: qemu unexpectedly closed the monitor: (process:7985): Spice-WARNING **: reds.c:2577:reds_init_socket: listen: Address already in use 2017-03-15T23:57:46.288270Z qemu-system-x86_64: failed to initialize spice server While searching for open bugs about it I found out that it was a kernel bug, which was fixed in kernel-4-13, later than what debian stretch has. The main upstream kernel fix seems to be: commit cbb2fb5c72f48d3029c144be0f0e61da1c7bccf7 Author: Josef Bacik <jba...@fb.com> Date: Fri Sep 22 20:20:06 2017 -0400 net: set tb->fast_sk_family This is not included in 4.9 kernel of debian stretch , # uname -ra Linux unassigned-hostname 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux Maybe it is worth to backport it. Thanks, Katerina