[Bug 1872343] [NEW] input is freezing when you have QEMU-KVM / virt-manager window opened

[Karel Trutla]

Public bug reported:

When I install Kubuntu 20.04 and then VM with another Kubuntu 20.04
(virt-manager) then keyboard randomly stop responding and Ctrl+c and
Ctrl+v doesn't always work. If I close virt-manager / shutdown the VM
then everything works fine again.

Steps to Reproduce:
1. install Kubuntu 20.04
2. install QEMU-KVM and virt-manager
3. install Kubuntu 20.04 as a VM
4. start copying and pasting text inside VM / in the host / between host and VM (spice has to be installed)
5. you'll see random freezes of your keyboard
6. Ctrl+c and Ctrl+v will work 80% time (very irritating)
7. close virt-manager and Ctrl+c and Ctrl+v will work just fine and no more keyboard freezes

In other words, it is not possible to use virt-manager unless you use VM
with no desktop.

Thank you. Please ask if you need more details ;-).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: plasma-desktop 4:5.18.3-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Apr 12 14:04:47 2020
InstallationDate: Installed on 2020-04-12 (0 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401)
SourcePackage: plasma-desktop
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: plasma-desktop (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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https://bugs.launchpad.net/bugs/1872343

Title:
  input is freezing when you have QEMU-KVM / virt-manager window opened

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