I have a Lenovo Ideapad Z580. It came with Windows 8 (not required by me for any purpose whatsoever), and I dual-booted with Ubuntu Linux 12.04.2 LTS. Upon starting the laptop every morning, it just goes into a blank screen. There are some solutions, however, none of them permanent as yet. My line of action now, is to totally get rid of whatever Windows 8 has, partitions, etc, and do a clean install of Ubuntu 12.04.2. Unless some solution does come up. BTW, Lenovo support in India also stated that if anything other than Windows 8 is found on the laptop, the warranty is void. They also did not offer option to downgrade Windows 8 to Windows 7. M$ does not sell Windows 7 anymore to normal Indian consumers anymore.