On Wed, Jun 10, 2020 at 01:58:13PM +0200, Christian Ehrhardt wrote: > Hi, > with a guest set up as in the following example mouse behavior breaks: > > <graphics type='spice' port='5901' autoport='no' listen='0.0.0.0'> > <listen type='address' address='0.0.0.0'/> > <gl enable='no'/> > </graphics> > <video> > <model type='qxl' ram='65536' vram='16384' vgamem='16384' heads='1' > primary='yes'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x0'/> > </video> > <video> > <model type='qxl' ram='65536' vram='16384' vgamem='16384' heads='1'/> > <address type='pci' domain='0x0000' bus='0x08' slot='0x01' > function='0x0'/> > </video> > > Please note that this is for illustration purposes as this everyone can > easily retry. > I originally had QXL + GPU as mediated device, where the behavior is the > same. > > If I know connect to that via spice, spice is smart and opens both displays: > $ virt-viewer --connect qemu+ssh://ubuntu@10.246.115.255/system guestname > > But while with one display mouse integration (to move in/out smoothly) and > positioning of the mouse pointer is fine. > It is broken with this double display setup. > What I see is: > - no mouse integration anymore (falls back to capture the mouse) > - often the mouse can not move upwards anymore > - sometimes "left" also doesn't work > > Let me know if someone wants a video in case the description is still too > odd. > > I have tried spice-client-gtk and virt-viewer, but both behave the same way. > > If I take away one of the displays it works well again. > So I'm wondering how virtual-multi-monitor is supposed to work, are there > known bugs or tweaks that would apply here? Did you enable the SPICE agent ? IIUC, the SPICE agent provides a paravirtualized mouse device, and that may be what's required to have this work properly with multi-monitor. The agent is also what lets you dynamically turn on/off each head and do display resizing. BTW, there are two ways todo multi-monitor with SPICE. One as youve shown here, and the oither using a single QXL card, but with heads=NNN instead of heads=1. One approach works best with Windows, and one approach works best with Linux, but I can't remember which way around. I expect they'll probably still have the same mouse behaviour though. > P.S. I tried VNC but that just has "other" issues. It only shows 1 of 2 > displays and on the one I see over amplifies the mouse movement by the > amount the other display adds to ther overall desktop size. VNC simply doesn't support multi-monitor at all. In theory we could block this in libvirt, but then if QEMU fixed it, libvirt would be needlessly blocking it. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
