16/06/30 11:30:22.27 QyP5xbw0.net
steamが動かないってのは、多分この話だな
Can't Open Steam in 16.04
URLﾘﾝｸ(ubuntuforums.org)
Just in case you do have an AMD GPU:
It's a known issue with the open-source drivers (which are now used by default since fglrx is not supported in 16.04) and Steam.