I've observed the same issue (in Ubuntu Gnome 15.04). In addition, when I select '' from the Virtual Machine Manager, View, Scale Display, Auto Resize VM with Window, the guest's screen starts flickering.
On Windows 10 64bit, virtio drivers and QXL installed from ISO extracted out the RPM here: https://fedorapeople.org/groups/virt/virtio- win/repo/latest/virtio-win-0.1.110-2.noarch.rpm. In all cases, I installed the Windows 8.1 x64 option, given w10 drivers are not yet included in the ISO. The windows QXL drivers haven't been updated since July 28th (v22.33.46.473) . There is a commit on github about windows 10 signatures here which suggests more formal support for Windows 10 is getting closer for some of the virtio driver set: https://github.com/crobinso/virtio-win-pkg- scripts/commit/342a5aaf632fa11cfd2e69acf589dd00c15f72ca Note, qxl-dod comes from http://cgit.freedesktop.org/spice/win32/qxl. I don't see any recent commits related to Windows 10 support. Red Hat bugzilla doesn't seem to have the auto resize VM bug noted anywhere? Perhaps this should be propagated upstream? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1479717 Title: Auto resize VM doesn't work with windows 10 guest Status in QEMU: New Bug description: I,m using a Ubuntu 15.04 host and a windows 10 guest (both 64 bit) on a intel i7 proc. My ubuntu system is up-to-date and I'm using QEMU emulator version 2.2.0. I use virt-manager 1.0.1 and SPICE guest tools 0.100 are installed on the guest. With the exactly same setup and a windows 7 guest I can set "Auto resize VM with window" and it perfectly works. After installing SPICE in windows 10 I can still select this box, but it doesn't work any longer. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1479717/+subscriptions
