I have the same bug on my lenovo B570 with BCM4313. It works fine, when m-a compiles it and then it suspended. When it returned from sleep it was unusable. It seems to me, that before, when this bug appeared i boot in Win and then back, and all was fine.
this is dmesg for my last session - http://pastebin.com/PAQMpt3i and lsmod - http://pastebin.com/CzFpQ2dR I'm sorry for my poor English. С наилучшими пожеланиями, Евгений.
