Hello,
The bug has already been reported on another forum https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/195166
But I'm facing the same bug and all the computer of my university (running new qemu version) are bugging the same way.
So is there a solution, I thinking about downgrading my version but can't found source of 0.8.2.
Many thanks
Antoine Dubois
Computer science engineer student