Here are commands to dump VBIOS into vbios.dump so you can provide this info to help debugging.

echo 1 > /sys/devices/pci0000:00/0000:00:02.0/rom
cat /sys/devices/pci0000:00/0000:00:02.0/rom >vbios.dump
echo 0 > /sys/devices/pci0000:00/0000:00:02.0/rom