Another observation (not sure if 100% relevant) When I leave "Generic PS/2 mouse" as an ONLY pointing device, I can observe erratic moving ("jumping") cursor in (at least) windows guests (NT4 sp 6 , XP, Win 8.1)
QEMU emulator version 5.0.0 (Debian 1:5.0-6) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1618301 Title: qemu-input: Mouse stops working in Windows guest Status in QEMU: New Bug description: ROCCAT Kone XTD mouse will randomly stop working in the guest until it's restarted. Windows Event Viewer shows an error in i8042prt, with the message "Could not set the mouse resolution". The XML log: - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> - <System> <Provider Name="i8042prt" /> <EventID Qualifiers="49157">23</EventID> <Level>2</Level> <Task>0</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2016-08-30T02:52:00.354536300Z" /> <EventRecordID>5708</EventRecordID> <Channel>System</Channel> <Computer>cronus</Computer> <Security /> </System> - <EventData> <Data /> <Binary>000008000100000000000000170005C03205000000000000000000000000000000000000000000000000000000000000</Binary> </EventData> </Event> Host is running Linux 4.7.2 with QEMU 2.6.1. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1618301/+subscriptions