Comment 0 for bug 1393548

Attempting to use the sgabios ROM to capture early boot BIOS messages on the serial console. Typically this can be done via libvirt domain configuration:

<os>
  <bios useserial='yes'/>
</os>

Resulting in the qemu process being launched with a '-device sga' argument that should load the optional ROM.

The sgabios package installs the ROM @ /usr/share/misc/sgabios.bin and symlinks to it from /usr/share/qemu/sgabios.bin

I noticed the expected serial output was missing and found that apparmor is preventing sgabios from loading when spawning the VM:

[ 1378.106921] type=1400 audit(1416255684.049:23): apparmor="DENIED" operation="open" profile="libvirt-c08c4756-2e2c-4c62-a519-0e3ac0cf643d" name="/usr/share/misc/sgabios.bin" pid=13182 comm="qemu-system-x86" requested_mask="r" denied_mask="r" fsuid=110 ouid=0

Worked around by manually installing the sgabios.bin file directly to /usr/share/qemu/sgabios.bin