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.

  • So , it seems like it goes into system halt , which is where the system stops, every process is closed, but peripherals are still powered on. Try opening terminal, with Ctrl + Alt + T shortcut and type in sudo shutdown -P now , where -P is power - off option. See if that works properly – Sergiy Kolodyazhnyy Feb 24 '16 at 17:38
  • okay I did as you said. But the same problem occurs. – user511049 Feb 24 '16 at 17:55
  • OK, in that case it's a different issue. See if this helps : askubuntu.com/q/508029/295286 – Sergiy Kolodyazhnyy Feb 24 '16 at 18:05
  • alright, I think I already went there and tried the solutions. But thanks so far. – user511049 Feb 24 '16 at 18:16

I solved it. I went to bios and set "OS optimized default" to "enabled" and hit "Load default setting". Then save and exit.

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