Hi, I hit the same. Today after I started my computer I had no audio at all.
I don't know the root cause, but I run as root alsactl init and it has helped. I hope it help you too as workaround. All the best Karel -- Karel Krecmer For reference: ~# alsactl init Found hardware: "HDA-Intel" "Intel CougarPoint HDMI" "HDA:14f1506e,17aa21da,00100002 HDA:80862805,80860101,00100000" "0x17aa" "0x21da" Hardware is initialized using a generic method ~$ dpkg -l | grep -e alsa -e pulse ii alsa-base 1.0.25+3 all ALSA driver configuration files ii alsa-firmware-loaders 1.0.27-2 amd64 ALSA software loaders for specific hardware ii alsa-oss 1.0.25-1 amd64 ALSA wrapper for OSS applications ii alsa-tools 1.0.27-2 amd64 Console based ALSA utilities for specific hardware ii alsa-tools-gui 1.0.27-2 amd64 GUI based ALSA utilities for specific hardware ii alsa-utils 1.0.27.1-1 amd64 Utilities for configuring and using ALSA ii bluez-alsa:amd64 4.101-2 amd64 Bluetooth ALSA support ii gstreamer0.10-alsa:amd64 0.10.36-1.1 amd64 GStreamer plugin for ALSA ii gstreamer0.10-pulseaudio:amd64 0.10.31-3+nmu1 amd64 GStreamer plugin for PulseAudio ii gstreamer1.0-pulseaudio:amd64 1.0.8-1 amd64 GStreamer plugin for PulseAudio ii libcanberra-pulse:amd64 0.30-2 amd64 PulseAudio backend for libcanberra ii libpulse-mainloop-glib0:amd64 4.0-6 amd64 PulseAudio client libraries (glib support) ii libpulse0:amd64 4.0-6 amd64 PulseAudio client libraries ii libpulsedsp:amd64 4.0-6 amd64 PulseAudio OSS pre-load library ii libsox-fmt-alsa:amd64 14.4.1-3 amd64 SoX alsa format I/O library ii pulseaudio 4.0-6 amd64 PulseAudio sound server ii pulseaudio-esound-compat 4.0-6 amd64 PulseAudio ESD compatibility layer ii pulseaudio-module-gconf 4.0-6 amd64 GConf module for PulseAudio sound server ii pulseaudio-module-x11 4.0-6 amd64 X11 module for PulseAudio sound server ii pulseaudio-module-zeroconf 4.0-6 amd64 Zeroconf module for PulseAudio sound server ii pulseaudio-utils 4.0-6 amd64 Command line tools for the PulseAudio sound server ii vlc-plugin-pulse 1:2.0.8-dmo2 amd64 PulseAudio plugin for VLC ii xmms2-plugin-alsa 0.8+dfsg-6 amd64 XMMS2 - ALSA output ii xmms2-plugin-pulse 0.8+dfsg-6 amd64 XMMS2 - PulseAudio output plug-in ~$ lsmod | grep -e audio -e snd snd_hda_codec_hdmi 31720 1 snd_hda_codec_conexant 40314 1 snd_hda_intel 35718 5 snd_hda_codec 122850 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel snd_hwdep 13189 1 snd_hda_codec snd_pcm 68525 4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel snd_page_alloc 13018 2 snd_pcm,snd_hda_intel snd_seq 45186 0 snd_seq_device 13176 1 snd_seq snd_timer 22773 2 snd_pcm,snd_seq snd 53068 19 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_pcm,snd_seq,snd_hda_codec,snd_hda_intel,thinkpad_acpi,snd_seq_device soundcore 13026 1 snd ~$ uname -a Linux .... 3.10-1-amd64 #1 SMP Debian 3.10.3-1 (2013-07-27) x86_64 GNU/Linux