Hello All, I just got a new Laptop, HP Compaq Presario CQ42, I installed
Ubuntu 10.04LTS and all is running fine but no Sound from the in-build
Speakers or Head-Phones. I replaced Ubuntu with Fedora13 and Sound works
fine. Could please someone explain to me how to get the Sound working in
Ubuntu? All Sound-Settings in Ubuntu are set to 100%, nothing muted.

Could you provide the output of lspci and lsmod, please?

It might help members get a better idea of what your current situation is.

My new sony had no sound with 10.04.
lspci shows me the sound is an Nvidia HDAC (rev a1) chipset.

I needed to install linux-backports-modules-alsa-kernel-name and reboot.

Then sound worked

Hi win32sux, thanks for your Reply. Here is the output for lspci and lsmod.

lspci output:
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:1a.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation 82801I (ICH9 Family) Thermal Subsystem (rev 03)
02:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device 8171 (rev 10)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
lsmod output is:
Module Size Used by
binfmt_misc 6587 1
ppdev 5259 0
snd_hda_codec_intelhdmi 11622 1
snd_hda_codec_realtek 203312 0
fbcon 35102 71
tileblit 2031 1 fbcon
font 7557 1 fbcon
bitblit 4707 1 fbcon
softcursor 1189 1 bitblit
vga16fb 11385 0
vgastate 8961 1 vga16fb
iptable_nat 4414 0
nf_nat 15735 1 iptable_nat
nf_conntrack_ipv4 10672 3 iptable_nat,nf_nat
nf_conntrack 61583 3 iptable_nat,nf_nat,nf_conntrack_ipv4
nf_defrag_ipv4 1073 1 nf_conntrack_ipv4
iptable_mangle 2771 0
iptable_filter 2271 0
ip_tables 9991 3 iptable_nat,iptable_mangle,iptable_filter
x_tables 14299 2 iptable_nat,ip_tables
snd_hda_intel 22037 1
snd_hda_codec 74201 3 snd_hda_codec_intelhdmi,snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 5412 1 snd_hda_codec
snd_pcm_oss 35308 0
snd_mixer_oss 13746 1 snd_pcm_oss
i915 285891 3
snd_pcm 70886 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_dummy 1338 0
snd_seq_oss 26726 0
snd_seq_midi 4557 0
snd_rawmidi 19056 1 snd_seq_midi
snd_seq_midi_event 6003 2 snd_seq_oss,snd_seq_midi
snd_seq 47263 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 19098 2 snd_pcm,snd_seq
snd_seq_device 5700 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
drm_kms_helper 29297 1 i915
psmouse 63245 0
uvcvideo 57022 0
joydev 8708 0
videodev 34361 1 uvcvideo
v4l1_compat 13251 2 uvcvideo,videodev
serio_raw 3978 0
snd 54148 15 snd_hda_codec_intelhdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_ mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
drm 163098 4 i915,drm_kms_helper
i2c_algo_bit 5028 1 i915
r8192se_pci 448303 0
video 17375 1 i915
soundcore 6620 1 snd
snd_page_alloc 7172 2 snd_hda_intel,snd_pcm
intel_agp 24415 2 i915
output 1871 1 video
agpgart 31788 2 drm,intel_agp
lp 7028 0
parport 32635 2 ppdev,lp
usbhid 36174 0
hid 67032 1 usbhid
usb_storage 39457 0
ahci 32232 2
r8169 34300 0
mii 4381 1 r8169
Hope you can help me, thanks.

Hi tredegar,
Thanks for your Reply,I installed the linux-backport as you suggested,
but unfortunately it doesn't work for me.
Thanks again