Comment 31 for bug 723871

git clone git://git.freedesktop.org/git/spice/qemu
cd qemu/
git checkout -b spice.v35 origin/spice.35

Allows to build qemu-kvm-spice_0.14.0+noroms-0ubuntu4qxl3_amd64.deb with patches

larger_default_ram_size.patch
# Detect-and-use-GCC-atomic-builtins-for-locking.patch
# 0001-qxl-spice-display-move-pipe-to-ssd.patch
# 0002-qxl-implement-get_command-in-vga-mode-without-locks.patch
# 0003-qxl-spice-remove-qemu_mutex_-un-lock_iothread-around.patch
# 0004-hw-qxl-render-drop-cursor-locks-replace-with-pipe.patch

Package seems to work OK with SPICE2 PPA