Okay, nevermind, the OS froze as I've tried to change the level on the PCM channel, so I rebooted and tried to look for anything that might have left a trace for what has happened, and I think I found what you were looking for: http://pastebin.com/YfP61KBk
It was under /var/log/messages.0 (same things also under /var/log/syslog for some weird reason) I haven't been able to see what caused the freezing.
Also found this, not sure if it's useful: _______________________________________________________________________ Apr 12 23:30:50 flying-topsoil kernel: [18087.771787] [<c12b3777>] ? dump_stack+0xa/0x13 Apr 12 23:30:50 flying-topsoil kernel: [18087.771813] [<f819d839>] ? xrun+0x9a/0xb2 [snd_pcm] Apr 12 23:30:50 flying-topsoil kernel: [18087.771824] [<c104e65d>] ? ktime_get_ts+0x30/0x77 Apr 12 23:30:50 flying-topsoil kernel: [18087.771838] [<f819e43c>] ? snd_pcm_update_hw_ptr0+0x91/0x744 [snd_pcm] Apr 12 23:30:50 flying-topsoil kernel: [18087.771847] [<c103bca3>] ? hrtimer_start_range_ns+0x20/0x25 Apr 12 23:30:50 flying-topsoil kernel: [18087.771853] [<c103b9c2>] ? hrtimer_try_to_cancel+0x4a/0x51 Apr 12 23:30:50 flying-topsoil kernel: [18087.771864] [<f8198cbb>] ? snd_pcm_hwsync+0x30/0x46 [snd_pcm] Apr 12 23:30:50 flying-topsoil kernel: [18087.771874] [<f819ab7b>] ? snd_pcm_common_ioctl1+0x5c/0xa0f [snd_pcm] _______________________________________________________________________