<4> [<ffffffff882eea4e>] :snd_pcm:snd_pcm_open_substream+0x13/0x88 <4> [<ffffffff80063c9d>] .text.lock.mutex+0xf/0x14 <4> [<ffffffff882eeb97>] :snd_pcm:snd_pcm_open+0xd4/0x21c <4> [<ffffffff8008e857>] default_wake_function+0x0/0xe <4> [<ffffffff8829b047>] :snd...