The “QEMU/KVM – Not Connected” error in Virtual Machine Manager (virt-manager) can have several potential causes and fixes. Let’s lokk into the details. At Bobcares, we assist our customers with several KVM queries on a daily basis as part of our Server Management Services.

More on “QEMU/KVM – Not Connected” Error

The “QEMU/KVM – Not Connected” error message in Virtual Machine Manager (virt-manager) shows that the virt-manager program cannot connect to the QEMU/KVM hypervisor. This connection is needed for managing VMs. Some of the common causes and fixes for the error are as follows:

1. Check libvirtd Service:

i. Run systemctl status libvirtd to check if the service is running.

ii. If not, start it with sudo systemctl enable –now libvirtd.

2. Enable Hardware Virtualization:

i. Check support with egrep -q ‘vmx|svm’ /proc/cpuinfo && echo yes || echo no.

ii. Enable virtualization in the BIOS (look for options like “Intel VT-x” or “AMD-V”).

3. Correct Connection Type:

i. In Virt-Manager, go to “Edit” > “Connection Details”.

ii. Ensure “Connection type” is set to “QEMU/KVM user session”.

4. Load Kernel Modules:

i. Check loaded modules with lsmod | grep kvm.

ii. Load missing modules with sudo modprobe kvm and sudo modprobe kvm_intel or kvm_amd.

5. Check Permissions:

i. Ensure the user is in the libvirt group: id -nG.

ii. If not, add it: sudo usermod -a -G libvirt .

6. Check Storage Pool:

i. Verify the storage directory exists and has correct permissions: ls -ld /media/klenha/VMs.

7. Reinstall Required Packages:

i. Reinstall QEMU, libvirt, and virt-manager packages: sudo dnf reinstall qemu* libvirt* virt*.

We can easily fix the error with these steps.

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Conclusion

Following the steps given above should resolve the “QEMU/KVM – Not Connected” error in Virt-Manager. For additional issues, our Experts can help you with customized solutions.