No sound after update to Ubuntu 8.04

Hi, just bought a little Toshiba NB100 notebook which came with Linux Ubuntu 8.04.

I ran the update manager a few hours after I bought the machine. The updates installed seemed to have done something to my sound, which is no longer working at all. The speaker icon has a red sign attached to it and when I click on the icon I get error messages: No volume control GStreamer plugins and/or devices found. On occasion I also get a second error message along the same lines just a bit more wordy and telling me I can remove the icon from view.

I have done some digging and ran quite a few of the commands from various site but nothing has worked. I understand this i quite a common issue and there is a lot of info out there. However being new to this most of what is recommended I dont understand.

My sound card is: intel 82801g (ich7 family) high definition audio controller.

My kernel is: 2.6.24-19-lpia #1 SMP Mon Nov 3 15:25:26 UTC 2008 i686 GNU/Linux

My alsa core sound module is:

filename: /lib/modules/2.6.24-19-lpia/kernel/sound/soundcore.ko
alias: char-major-14-*
license: GPL
author: Alan Cox
description: Core sound module
srcversion: 548AA54AF08207316C104F8
depends:
vermagic: 2.6.24-19-lpia SMP mod_unload 586

I have attempted to download the latest alsa drivers but i cannot open the files to install them.

I have been able to run a report on the alsa configuration on my machine and the result is below:

!!################################
!!ALSA Information Script v 0.4.56
!!################################

!!Script ran on: Mon May 4 13:11:56 UTC 2009

!!Linux Distribution
!!------------------

Ubuntu 8.04.1 \n \l DISTRIB_ID=Ubuntu DISTRIB_DESCRIPTION="Ubuntu 8.04.1"

!!Kernel Information
!!------------------

Kernel release: 2.6.24-19-lpia
Operating System: GNU/Linux
Architecture: i686
Processor: unknown
SMP Enabled: Yes

!!ALSA Version
!!------------

Driver version:
Library version: 1.0.15
Utilities version: 1.0.15

!!Loaded ALSA modules
!!-------------------

!!Sound Servers on this system
!!----------------------------

Pulseaudio:
      Installed - Yes (/usr/bin/pulseaudio)
      Running - Yes

ESound Daemon:
      Installed - Yes (/usr/bin/esd)
      Running - No

aRts:
      Installed - Yes (/usr/bin/artsd)
      Running - No

!!Soundcards recognised by ALSA
!!-----------------------------

!!PCI Soundcards installed in the system
!!--------------------------------------

00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)

!!Advanced information - PCI Vendor/Device/Susbsystem ID's
!!--------------------------------------------------------

00:1b.0 0403: 8086:27d8 (rev 02)
        Subsystem: 1179:ff7b

!!Modprobe options (Sound related)
!!--------------------------------

snd-atiixp-modem: index=-2
snd-intel8x0m: index=-2
snd-via82xx-modem: index=-2
snd-usb-audio: index=-2
snd-usb-usx2y: index=-2
snd-usb-caiaq: index=-2
snd-cmipci: mpu_port=0x330 fm_port=0x388

!!Loaded sound module options
!!--------------------------

!!ALSA Device nodes
!!-----------------

!!Aplay/Arecord output
!!------------

APLAY

aplay: device_list:205: no soundcards found...

ARECORD

arecord: device_list:205: no soundcards found...

!!Amixer output
!!-------------

!!Alsactl output
!!-------------

--startcollapse--
--endcollapse--

!!All Loaded Modules
!!------------------

Module
xt_limit
xt_tcpudp
ipt_LOG
ipt_MASQUERADE
ipt_TOS
ipt_REJECT
nf_conntrack_irc
nf_conntrack_ftp
xt_state
osd_driver
binfmt_misc
parport_pc
ppdev
parport
i915
acpi_cpufreq
cpufreq_userspace
cpufreq_powersave
cpufreq_conservative
cpufreq_stats
drm
joydev
wlan_scan_sta
ath_rate_sample
uvcvideo
compat_ioctl32
videodev
v4l1_compat
v4l2_common
psmouse
serio_raw
ath_pci
wlan
ath_hal
r8169
iTCO_wdt
iTCO_vendor_support
soundcore
intel_agp
agpgart
iptable_nat
nf_nat
nf_conntrack_ipv4
nf_conntrack
iptable_mangle
iptable_filter
ip_tables
x_tables
ahci
squashfs
unionfs
ehci_hcd
isofs
zlib_inflate

The report doenst really mean anything to me. Please can someone help.