Ubuntu
pulseaudio package

  1. Bug #394500
  2. Comment #78

Comment 78 for bug 394500

Revision history for this message
bdoe (bdoe-att) wrote : Re: [Karmic] processes holding /dev/dsp* or /dev/snd/pcm* cause "pulseaudio: card not found - Null Output / Dummy Output"

I am also affected by this bug. Everything was fine until I activated the restricted driver for my modem. Upon reboot, no sound, and no sound hardware registered in alsamixer or pulseaudio. Issuing 'sudo alsa force-reload' restored sound and placed my sound hardware back in pulseaudio's hardware tab.

cat /proc/asound/card*/codec* | grep Codec:
Codec: Realtek ALC268
Codec: Motorola Si3054

lspci -v:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
 Subsystem: Hewlett-Packard Company Device 30cc
 Flags: bus master, fast devsel, latency 0, IRQ 31
 Memory at f8400000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>
 Kernel driver in use: HDA Intel
 Kernel modules: snd-hda-intel

sudo alsa force-reload:
lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
Terminating processes: 1140lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
 1864lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
 4171lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
 4198lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
 (with SIGKILL:) 4240lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
 (failed: processes still using sound devices: 4285(pulseaudio)).
lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/briandoe/.gvfs
      Output information may be incomplete.
/sbin/alsa: Warning: Processes using sound devices: 4285(pulseaudio).
Unloading ALSA sound driver modules: snd-hda-codec-si3054 snd-hda-codec-realtek snd-hda-intel snd-hda-codec snd-hwdep snd-pcm-oss snd-mixer-oss snd-pcm snd-seq-dummy snd-seq-oss snd-seq-midi snd-rawmidi snd-seq-midi-event snd-seq snd-timer snd-seq-device snd-page-alloc (failed: modules still loaded: snd-hda-codec-si3054 snd-hda-codec-realtek snd-hda-intel snd-hda-codec snd-hwdep snd-pcm snd-timer snd-page-alloc).
Loading ALSA sound driver modules: snd-hda-codec-si3054 snd-hda-codec-realtek snd-hda-intel snd-hda-codec snd-hwdep snd-pcm-oss snd-mixer-oss snd-pcm snd-seq-dummy snd-seq-oss snd-seq-midi snd-rawmidi snd-seq-midi-event snd-seq snd-timer snd-seq-device snd-page-alloc.