It looks like after an update to intrepid I lost completely sound on my machine (only beep works). Poking around it seems no kernel sound module is loaded at all, and /proc/asound doesn't even exist, no trace of audio/sound/snd in various system logs.
$ gnome-sound-properties
(gnome-sound-properties:5334): sound-properties-DEBUG: setting theme ubuntu
sound-properties-Message: Error running pipeline 'audiotestsrc wave=sine freq=512 ! audioconvert ! audioresample ! gconfaudiosink': Failed to connect stream: Invalid argument [pulsesink.c(634): gst_pulsesink_prepare (): /GstPipeline:pipeline0/GstGConfAudioSink:gconfaudiosink0/GstBin:bin0/GstAutoAudioSink:autoaudiosink0/GstPulseSink:autoaudiosink0-actual-sink-pulse]
^C
$ ls -l /proc/as*
ls: ne peut accéder /proc/as*: Aucun fichier ou dossier de ce type
$ dmesg|grep -i sound
$ dmesg|grep -i audio
$ dmesg|grep -i snd
$ lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 741/741GX/M741 Host (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SiS AGP Port (virtual PCI-to-PCI bridge)
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 90)
00:09.0 USB Controller: NEC Corporation USB (rev 43)
00:09.1 USB Controller: NEC Corporation USB (rev 43)
00:09.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter
$ lspci -n
00:00.0 0600: 1039:0741 (rev 03)
00:01.0 0604: 1039:0003
00:02.0 0601: 1039:0963 (rev 25)
00:02.1 0c05: 1039:0016
00:02.5 0101: 1039:5513
00:02.7 0401: 1039:7012 (rev a0)
00:03.0 0c03: 1039:7001 (rev 0f)
00:03.1 0c03: 1039:7001 (rev 0f)
00:03.2 0c03: 1039:7002
00:04.0 0200: 1039:0900 (rev 90)
00:09.0 0c03: 1033:0035 (rev 43)
00:09.1 0c03: 1033:0035 (rev 43)
00:09.2 0c03: 1033:00e0 (rev 04)
01:00.0 0300: 1039:6330
$ lsmod|grep snd
$ lsmod|grep sound
$
Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately we can't fix it without more information.
Please include the following additional information, if you have not already done so (pay attention to lspci's additional options), as required by the Ubuntu Kernel Team:
1. Please include the output of the command "uname -a" in your next response. It should be one, long line of text which includes the exact kernel version you're running, as well as the CPU architecture.
2. Please run the command "dmesg > dmesg.log" after a fresh boot and attach the resulting file "dmesg.log" to this bug report.
3. Please run the command "sudo lspci -vvnn > lspci-vvnn.log" and attach the resulting file "lspci-vvnn.log" to this bug report.
Additionally, please include the information requested from the "Reporting Sound Bugs" section of https:/