Re: [Qemu-devel] regression in 2.8: unable to exit screen grab in SDL mode

[Kevin Wolf]

Am 15.12.2016 um 23:30 hat Michael S. Tsirkin geschrieben:
> On Thu, Dec 15, 2016 at 05:25:50PM +0100, Gerd Hoffmann wrote:
> >   Hi,
> > 
> > > > > > The problem always reproduces for me:
> > > > > > - start qemu with -sdl
> > > > > > - wait for guest to boot
> > > > > > - click anywhere within guest screen
> > > > > > - message "press ctrl+alt to exit capture" appears on screen,
> > > > > >   but pressing that immediately restarts capture again
> > 
> > [ 2.6 good, 2.7, 2.8 bad ]
> > 
> > > I'd say SDL is mostly useless with this bug.
> > > 
> > > Do we fix this or disable SDL altogether?
> > 
> > Well, it can't be *that* bad, otherwise it would not went unnoticed for
> > a whole release cycle.
> > 
> > It doesn't reproduce here.  There must be some other factor which is
> > needed to trigger this.  What desktop you are using?  gnome?  kde?
> > something else?  Xorg or wayland?
> > 
> > Can you try to bisect it?
> 
> Looks like 2.6 does not work either :( Gerd, are you using F25?
> Steps
> - launch fedora guest with kvm, default pc graphics and SDL ui
> - wait until graphical login prompt starts
> - click within window
> 
> afterwards, clicking Ctrl-Alt exits and immediately restarts grab.

I'm seeing two different behaviours depending on the guest:

The first is the traditional behaviour where you click in the window, it
grabs and you control the guest's mouse cursor, and here ctrl+alt works
fine to ungrab.

The second one is much like with the tablet in that it shared the mouse
cursor between host and guest. In this one, when I ungrab with ctrl+alt,
it automatically grabs again as soon as I move the mouse cursor (i.e. it
is actually ungrabbed if I only use the keyboard). But as the mouse
cursor is shared with the host, I can simply move it out of the VM
window and then the capture ends, so that's fine.

So for me that's exactly what I want it to do (RHEL 7 host with qemu.git
master). Is what you got the second behaviour, but without the shared
mouse cursor?

Kevin