[Qemu-devel] Mousegrab broken with vfio in 2.1.0 (was: [PATCH 00/25] qemu gtk ui overhaul)

[Benedikt Morbach <benedikt.morbach@googlemail.com>]

I think one of those gtk patches broke mouse/keyboard grab for my
Windows 8 vfio/vga-passthrough setup in 2.1.0 and I was instructed on
IRC to report that here.

With 2.0.0 I got a black qemu window with "This VM has no graphic
display device", which I could click on to get a mouse grab.
With 2.1.0 I just get the qemu monitor window.
If I press Ctrl-Alt-g or use the corresponding menu entry, the gtk
window grabs the input devices and the titlebar changes to "press
Ctrl-Alt-g to release grab", but none of the input reaches the vm.

I tried all of {gtk3, sdl} x {usb-mouse, usb-tablet}:
With gtk3, none worked.
With sdl usb-tablet worked, but I haven't figured out how to do an
actual mouse grab. (maybe related to me passing "-vga none"?)

If I drop the "-vga none" I can get a mouse-grab, but the passed-through
gpu won't work, so this is no option for me.

If needed I can produce some logs with both 2.0 and 2.1, but I don't
know what options I should pass to qemu to make those useful.

Here is how I start qemu:
qemu-system-x86_64
    -enable-kvm -M q35  -cpu host,hv-time,kvm=off -vga none
    -m 8192 -smp 2,sockets=1,cores=2,threads=1
    -bios /usr/share/qemu/bios.bin
    -device ioh3420,bus=pcie.0,addr=1c.0,multifunction=on,port=1,chassis=1,id=root.1
    -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on
    -device vfio-pci,host=01:00.1,bus=root.1,addr=00.1
    -drive file=/mnt/images/Win8.raw,id=disk,format=raw,if=virtio
    -device ich9-intel-hda,bus=pcie.0,addr=1b.0,id=sound0
    -device hda-micro,id=sound0-codec0,bus=sound0.0,cad=0 
    -net bridge -net nic,model=virtio
    -rtc base=localtime
    -usb
    -usbdevice mouse
    -usbdevice keyboard

Greetings,
Benedikt