No Sound Ubuntu 7.10

Laptop or desktop? Does it show up on the proper lsusb or lspci ... ?

It's a Dell Dimension 8300 desktop and when I type in lsusb in the terminal it shows up:
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000

And when I type in lspci, this shows up:
00:00.0 Host bridge: Intel Corporation 82875P/E7210 Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82875P Processor to AGP Controller (rev 02)
00:06.0 System peripheral: Intel Corporation 82875P/E7210 Processor to I/O Memory Interface (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corporation 82801EB/ER (ICH5/ICH5R) LPC Interface Bridge (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801EB/ER (ICH5/ICH5R) IDE Controller (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801EB (ICH5) SATA Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801EB/ER (ICH5/ICH5R) SMBus Controller (rev 02)
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev 02)
02:01.0 Communication controller: Conexant Unknown device 2702 (rev 01)
02:02.0 Multimedia audio controller: Creative Labs SB Audigy (rev 04)
02:02.2 FireWire (IEEE 1394): Creative Labs SB Audigy FireWire Port (rev 04)
02:03.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5500] (rev a1)
02:08.0 Ethernet controller: Intel Corporation 82562EZ 10/100 Ethernet Controller (rev 02)

Do you know if any upgrades were performed?
Have you checked to make sure the sound isn't muted by mistake?
Is there any possibility that the wire may have come loose between your speakers and your computer?

sudo cp /etc/modprobe.d/alsa-base /etc/modprobe.d/alsa-base.bak
This is just to keep backup, in case sumthng goes wrong.

sudo gedit /etc/modprobe.d/alsa-base
This will open up a file in the text editor.
Append to the end of this file the following line:
options snd-hda-intel position_fix=1 model=3stack

Save and exit. Restart and retry.

Thanks Mohit, that solved my question.

I m using Intel Core 2 Duo 2.33, Realtek and Creative Speakers.
Mohit's solution proved okay for the same problem of no sound.
Thank you,

Praveen

pleasure