Fedora 26 libvirt connection times out

Question

I've been trying to get libvirtd and virt-manager to work for days now.

I have all the entire "Virtualization" group of packages installed and have confirmed that libvirtd is running with systemctl status libvirtd.

When I open virt-manager (as root or a normal user), I get the following: Virtual Manager Main Screen, with these connection details.

If I use virsh then connect to qemu:///system, I get the following:

Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # connect qemu:///system
[...]

Where [...] is simply blank; there is no response or error of any sort.

I have verified that /var/run/libvirt/libvirt-sock exists as well.

As an added note, which may or may not be of importance, libvirtd always fails to shutdown when I shut the computer down, and I have to forcefully power the machine off.

What should I do to get virtualization working?

Answer 1

It sounds like libvirtd is stuck / hanging during initialization for some reason. It is hard to diagnose why from the info you provided, but I'd recommend filing a bug against 'libvirt' in the Fedora bug tracker. If you can capture a stack trace of libvirtd daemon that would help the maintainers diagnose the problem. eg use GDB to get stack trace

 $ dnf debuginfo-install libvirt
 $ pgrep libvirtd
 ...prints PID of libvirtd...
 $ gdb
 (gdb) attach $PID-OF-LIBVIRTD
 (gdb) thread apply all backtrace

Then add the output to the bug as an attachment