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Old 09-16-2009, 04:20 PM   #1
bigjoe7
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Registered: Sep 2008
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no sound from ubuntu to LCD TV


My basic problem is I cannot get any sound of a collection of PCs connected up to my Samsung LE40A436T1DXXU (LE40A436) TV.

PC1) >> running Ubuntu 9.04 Desktop. Onboard sound card tested using Sennheiser PC 166 headphones working.

PC2) >> running windows7 desktop. Onboard sound card tested using Sennheiser PC 166 headphones working.

PC3) >> running Vista. Onboard sound card tested using Sennheiser PC 166 headphones working.

If i plumb any 3 of these PCs into my TV via DVI / HDMI dongle into 1 of 3 HDMI ports at the back of the Samsung I get picture. No problem.

None of the PCs produce any sound from the Samsung though.. Im fully aware there will be no sound passed over the DVI /HDMI connection.
When I connect phono leads or headphones lead from one of the PCs into the TV i still get no sound. Im at a loss why this is happening.

I have a 4th laptop and when i connect the HDMI directly into the TV I get sound and vision. Unfortunately I do not want this device hooked up to the TV.

Is this a TV issue? IS there anything i need to check.

One other thing, the TV gets its TV signal via coax feed. There are no other connections etc...

My main aim is to get a ubuntu PC rigged upto my TV as a HTPC. Hence the post here in this forums.
 
Old 09-16-2009, 04:54 PM   #2
lutusp
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Quote:
Originally Posted by bigjoe7 View Post
My basic problem is I cannot get any sound of a collection of PCs connected up to my Samsung LE40A436T1DXXU (LE40A436) TV.

PC1) >> running Ubuntu 9.04 Desktop. Onboard sound card tested using Sennheiser PC 166 headphones working.

PC2) >> running windows7 desktop. Onboard sound card tested using Sennheiser PC 166 headphones working.

PC3) >> running Vista. Onboard sound card tested using Sennheiser PC 166 headphones working.

If i plumb any 3 of these PCs into my TV via DVI / HDMI dongle into 1 of 3 HDMI ports at the back of the Samsung I get picture. No problem.

None of the PCs produce any sound from the Samsung though.. Im fully aware there will be no sound passed over the DVI /HDMI connection.
When I connect phono leads or headphones lead from one of the PCs into the TV i still get no sound. Im at a loss why this is happening.
This approach might be simpler: connect a set of headphones to your laptop. Try to make some sound come out of the headphones. Activate the sound mixer applet, change the settings. Don't stop until there is sound coming out of the headphones.

Now, having broken the problem into two pieces and solved one of them, connect the Home Theater sound system up to the headphone jack, and debug it, confident that there is a signal present.
 
Old 09-16-2009, 06:57 PM   #3
bigjoe7
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Hi

Got it working following this procedure

https://help.ubuntu.com/community/HdaIntelSoundHowto

Thanks for your time lutusp. You got me believing that there was a signal and it would work eventually.
 
Old 09-16-2009, 08:33 PM   #4
bigjoe7
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ok - after a reboot I have now lost my sound to the TV. Headphones still work. Previosly to get it working I had added the following line

Code:
options snd-hda-intel model=3stack-660
into alsa-base.conf

pretty much tried everything now.

Code:
adrian@adrian-desktop:/etc/modprobe.d$ cat /proc/asound/card0/codec#* | grep Codec
Codec: Realtek ALC660
aplay -l

Code:
**** List of PLAYBACK Hardware Devices ****
card 0: VT82xx [HDA VIA VT82xx], device 0: ALC861 Analog [ALC861 Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

I have also got alsa-project.org to query my card >>> http://www.alsa-project.org/db/?f=e0...c64fed94e572cd

nothing appears to be in dmesg relating to snd
 
Old 09-17-2009, 05:54 PM   #5
bigjoe7
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ok

i have just installed 9.04 again with all updates on new hardware.

Motherboard = asus p5b deluxe with following sound enabled

Code:
adrian@adrian-desktop:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: AD198x Digital [AD198x Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
when loading up first time after all updates had been installed I had no sound.

i then subsequestly rebooted, and guess what. the sound has gone away.

I have been on this for days. any help please?

i have been doing a lot of testing from alsamixer to no avail.
 
Old 09-17-2009, 06:14 PM   #6
lutusp
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Registered: Sep 2009
Distribution: Fedora
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Quote:
Originally Posted by bigjoe7 View Post
ok

i have just installed 9.04 again with all updates on new hardware.

Motherboard = asus p5b deluxe with following sound enabled

Code:
adrian@adrian-desktop:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: AD198x Digital [AD198x Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
when loading up first time after all updates had been installed I had no sound.

i then subsequestly rebooted, and guess what. the sound has gone away.

I have been on this for days. any help please?

i have been doing a lot of testing from alsamixer to no avail.
1. Plug in your headphones. Test that way until you are satisfied that the sound is working.

2. Once you have the sound working, unplug the headphones and plug in your Home Theater.

3. When you are ready to shut down the computer, BE SURE to log out of the X Windows desktop before turning it off. This is absolutely essential. If you do not do this, all your sound settings will be lost.
 
Old 09-17-2009, 06:55 PM   #7
bigjoe7
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lutusp - tried it and didnt make a difference.

Ok i have reinstalled the OS again from a fresh and the sound has worked. Sound worked through the TV as I wanted it.

I saved the asalmixer settings using the following command

Code:
alsaclt store
And rebooted. The PC came back up again with sound with all the cabling still plumbed into the TV. Great.
I then removed the 3.5mm sound jack when performing a sound test. Inserted the jack and sound could be heard through the TV. Great.

Decided not to perform any widespread software updates but installed the nvidia graphics 180 version. Installed and rebooted.

Sound dead through the TV works via headphones.

Rebooted still no sound.

Uninstalled nvidia drivers and rebooted. Sound has come back.

Installed nvidia version 173.....no sound. Removed them and sound has returned.

So the graphics card drivers are influencing the sound.

Incidentally I have a spdif connection in the back of the PC going to the TV also.
 
  


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