I installed Ubuntu 13.04 on my Lenovo laptop alongside Windows 8 which was already preinstalled. I chose Install Ubuntu alongside Windows 8. It went smoothly until I got a message:
Installation complete and a Restart button. I clicked the Restart button.
After rebooting I got just a black screen. I waited a few minutes and the black screen remained unchanged. I did a hard power off by pushing the power button of my computer a few seconds, and restarted my computer. I clicked F12 a "Boot manager screen" popped up with two options: Windows and Ubuntu. I chose Ubuntu, but after a few seconds Windows booted up.
I have tried a few times. Whatever I choose at boot manager, my laptop always boots to Windows. This is a screenshot of my Windows 8 system information:
How do I fix this?