I have a Lenovo B50-10. I installed Ubuntu 14.04. When I want to shutdown the computer Ubuntu hangs. The hard drive turns off but the display shows me the Ubuntu logo with the dots. When I want to restart the display turns black and the computer doesn't do anything.
I have already tried a lot of things (modifiying the boot options etc) mentioned in threads with the same problem. Unfortunately none of them worked for me. I really don't know what to do also because it's my first linux. Thanks for your help.
