Public bug reported:

Test image: Ubuntu 16.10 (Yakkety Yak) Daily Build 18-Sep-2016 08:56 
Test machine: X1 Yoga (Raven-3) (201602-41481)
CPU: Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
GPU: Intel Corporation Device [8086:1916] (rev 07)
BIOS: N1FET32W (1.06 )

1. Boot system and enter BIOS.
2. Set 'Startup' to 'Legacy First' and press 'F10'.
3. Save the setting and plug 16.10 USB installer.
4. Try to install Ubuntu 16.10 (Yakkety Yak) Daily Build on Lenovo ThinkPad X1 
Yoga - Raven.
5. After installation finished, system got hang on power down.
6. Forced shutdown system and boot it up.

Actual result: 
After 'Lenovo' logo flashed, screen is getting black and nothing printed.

I also try to install image under 'UEFI' mode. When plug in USB install
and boot system up, the screen is getting black too. The installation
can not be executed.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: grub

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  Laptop monitor is black when boot up system.

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