Bug#1059211: qemu-system-x86: QEMU/KVM guests: Window contents partially not updated

[Antonio]

Dear Maintainer,

after updating to version "1:8.2.0+ds-1" I encountered the same problem 
with various VM relating to linux systems with Kde/Xfce graphical 
desktop (e.g. Debian, Arch etc...).

Thank you,
Anthony