https://bugs.freedesktop.org/show_bug.cgi?id=66963
--- Comment #173 from Eugene ken20001@ukr.net --- lspci | grep VGA 02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV670 [Radeon HD 3870]
It boot if boot from power button, but is case of 'sudo reboot' command, black screen and, it seems, it freezes completely.