First time i logged in after installation everything worked fine, both youtube videos, other flash videos from web, and videofiles on my pc. I used to hibernate pc, not shut down. But first time i restarted pc - everything crashed (maybe some update has been installed): the playback speed of youtube videos and other flash videos and audios from web is very high, there is no sound in them. Even when i play videos with vlc player i cant hear any sound and speed problem sometime appears. I have ubuntu mate 16.04.3
Any suggestions?