Created attachment 822814 [details]
qemu-grup-vnc-versus-spice.png

qemu started like this:

ionice -c 3 qemu-kvm -enable-kvm -global qxl.ram_size=1x1024 -m 2048M -smp 4 -drive file=./Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2,index=0,media=disk,cache=unsafe -localtime -serial file:/tmp/qemu-Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2-output.log -name Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2 -cdrom /local/mfabian/iso/Fedora-20-Beta-RC5/Fedora-20-Beta-x86_64-netinst.iso -boot c -spice port=6000,disable-ticketing -vga qxl -display vnc=:4 -net nic -net user,hostname=Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2,hostfwd=tcp::5556-:22 -monitor stdio -usb

Version:

qemu-1.6.1-1.fc20.x86_64

2 remote-viewer started like this:

remote-viewer --title ./Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2 vnc://localhost:5904
remote-viewer --title ./Fedora-20-Beta-RC5-x86_64-netinst.iso.qcow2 spice://localhost:6000

The remote-viewer using vnc displays correctly when grub is visible,
the remote-viewer using spice shows graphic corruption when grub is visible.

See attached screen shot.

When grub is finished and the system starts to boot, the display
looks OK for both, vnc and spice (both when the graphical boot process
is used or when I switch to the text mode by hitting the ESC key).