Comment 3 for bug 1428833

we have a workaround for the spice console issue with CentOS 7/RHEL. Here the instructions:

Please add inside the /etc/default/grub config file the
option "nofb nomodereset" to the GRUB_CMDLINE_LINUX variable and regenerate the grub2 config

Tested config /etc/default/grub
-------------------------------
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL="serial console"
GRUB_SERIAL_COMMAND="serial"
GRUB_CMDLINE_LINUX="console=ttyS0 console=tty0 crashkernel=auto vconsole.keymap=us nofb nomodereset"
GRUB_DISABLE_RECOVERY="true"

Rebuilt grub2 config
--------------------
grub2-mkconfig -o /boot/grub2/grub.cfg