OpenSUSE Tumbleweed does not boot to GUI after upgrade

OpenSUSE Tumbleweed kernel update as of 3/31/2016 does not boot to the UI anymore. This was observed on VirtualBox 5.0.16. Workaround is to pass iomem=relaxed to the kernel, see below for details.

1. Reboot the machine.
2. During the boot-up press e at the screen below.
   
3. Look for the line with linux and add iomem=relaxed
   

Reference:
https://forums.opensuse.org/showthread.php/514436-X-server-not-starting-after-update