I was have Ubuntu before maybe 10.10 and was working fine. after I buy my new laptop AsusX401A with Win8-64bit, I was installed Ubuntu 13.04 but after restart the computer I got a black Screen. and I Google it and install boot-repair. and than, just I can log-on to Win8 only. If i boot Ubuntu I got this message.
[[ 2.238863 kernel panic - not syncing: no init found. try passing init= option to kernel. see linux Docmentation/init.txt for guidance. ]]