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

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

On Thu, 2014-08-07 at 00:22 +0200, Benedikt Morbach wrote:
> 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

I have now bisected this down to:

commit ed1132e41a31ded554adc542ddf043714f05b9d0                                                                                                                                                                                                

    gtk: support multiple gfx displays

    Each display gets its own tab.  Tab switching continues to work like it
    did, just the hotkeys of the vte consoles changes in case a secondary
    display is present as it will get ctrl-alt-2 assigned and the vtes are
    shifted by one.