Try pressing F6, then escape and enter nomodeset into the boot options. You can also refer to this http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html
Try pressing F6, then escape and enter nomodeset into the boot options. You can also refer to this http:// www.ubuntugeek. com/how- to-fix- ubuntu- 10-04-lts- lucid-blank- screen- at-startup. html