KVM virtual machine performance optimisation (sound, graphics) -- 2

WARNING: This is a very hard problem so please do not bid if you only used KVM before at the general level. One freelancer have already tried to resolve this with little success, so unless you know KVM inside out and have experience fixing this, you may not be able to troubleshoot this! When bidding, please write if you did similar work on fixing similar KVM virtualisation problems previously. Generic (i.e. templated) bid descriptions will be discarded. I have a localhost KVM up and running on a Linux Mint box, however I'm experiencing lagged (i.e. jittery) sound as well as lagged graphics (e.g. when moving windows) when running a Windows 7 VM. I have a brand new Lenovo laptop (about 6 months old) with all drivers updated and running smoothly. There's no system performance issues with anything else on the machine rather then KVM What I have tried (and what did not work): - various video drivers including Virtio - Changing Disk to the SATA from the default IDE drive - various sound drivers AC97 (does not work at all), ICH6/9 (jerky) - allocating more CPUs/memory including Payments: We will pay $30 per hour to fix this in sequential installments of half hour. If there is no perceptible progress over the first installment, the job will be re-posted again. Technology: - teamviewer connection to the Linux box from your machine - I will need to be online while the work is done and will provide administrator passwords - Your steps will be recorded so I can replicate the fixes this myself in a different machine Feel free to ask any questions, happy bidding!