Placa de Áudio Intel Corporation 8 Series / C220 [Dispositivo Dell 05a4] - Não funciona

Question

A placa de áudio não está mais funcionando e não estou tendo o problema. Qualquer ajuda será muito apreciada.

$ lspci -v | grep -B1 -A12 -i audio

00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
        Subsystem: Dell Device 05a4
        Flags: bus master, fast devsel, latency 0, IRQ 32
        Memory at f7c34000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04) (prog-if 30 [XHCI])
        Subsystem: Dell Device 05a4
        Flags: bus master, medium devsel, latency 0, IRQ 26
        Memory at f7c20000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: <access denied>
--

00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
        Subsystem: Dell Device 05a4
        Flags: bus master, fast devsel, latency 0, IRQ 29
        Memory at f7c30000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel

00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04) (prog-if 20 [EHCI])
        Subsystem: Dell Device 05a4
        Flags: bus master, medium devsel, latency 0, IRQ 23
        Memory at f7c3b000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>

$ aplay -l                                                      
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC3220 Analog [ALC3220 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

$ cat /etc/asound.conf 
# Use PulseAudio by default
pcm.!default {
#  type pulse
#  fallback "sysdefault"
#  hint {
#    show on
#    description "Default ALSA Output (currently PulseAudio Sound Server)"
#  }

   type hw
   card PCH
}

ctl.!default {
#  type pulse
#  fallback "sysdefault"

   type hw
   card PCH
}

# vim:set ft=alsaconf:

$ dmesg
(...)
[    4.880817] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[    4.880820] [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor 0
(...)

$ lsmod | grep '^snd' | column -t                               
snd_hda_codec_hdmi     49152   1
snd_hda_codec_realtek  69632   1
snd_hda_codec_generic  69632   1   snd_hda_codec_realtek
snd_hda_intel          36864   2
snd_hda_codec          106496  4   snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
snd_hda_core           49152   5   snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep              16384   1   snd_hda_codec
snd_pcm                86016   4   snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core
snd_timer              28672   1   snd_pcm
snd                    65536   12  snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel