Strange audio problems--OT question

Basil Chupin blchupin at
Fri Dec 28 11:44:03 UTC 2012

On 28/12/12 18:19, Doug wrote:
> On 12/28/2012 01:29 AM, Basil Chupin wrote:
> /snip/
>> The next question is: is this sound being generated by the 
>> motherboard's onboard chipset or by a PCI(/E) card? And which of 
>> these is selected/activated in the BIOS (you cannot have both 
>> activated [disclaimer here])?
> /snip/
> I would appreciate some more information on this.  This is not related 
> to Ubuntu, altho it affects Linux and XP.
> I have 2 sound decoders (if that's what they should be called) in my 
> system; one on the mobo, and another
> in my GeForce video card with NVidia hardware/software. The video card 
> has an HDMI port, which is connected
> to my TV. In Linux, I can get sound from the mobo with video (via the 
> normal computer video connection from
> the GeForce board.) However, no sound comes out of the TV.  In XP, I 
> can get video on both the local monitor
> and the TV, again, but this time I can only get sound from the TV. 
> Both Linux and XP use NVidia drivers designed
> for the respective systems.
> I hope I have described this correctly, since it has been some time 
> since I tried to get it working.
> I had a friendly fellow on the PCLOS Forum try to get sound from both 
> devices at the same time, but without success.
> Is there something built in to the motherboard, or into the OS or even 
> the BIOS which prevents sound from being
> decoded and output from both devices at the same time?
> I really wouldn't care if it worked in only one of the two operating 
> systems, since I want to use it to watch movies or
> delayed TV shows on the TV, but I would like to have the audio on the 
> computer audio also, so as to set things up,
> and so on, at the computer, the TV being in another room.
> I would assume that if anyone ever figures out to do this, it will be 
> for the Linux system, since that's open software,
> and XP is not.
> If you need to know the technical details:
> Foxconn mobo, G41MXE/G41MXE-K
> BIOS: American Megatrends ver.080015, dtd 10/14/2010
> CPU:Intel Celeron E3400 @ 2.60GHz. (Dual Core)
> On-board video disabled in BIOS.
> Video: GeForce GTX 550 Ti
> Audio--on mobo: Intel N10/ICH 7 Family High Definition Audio Controller
> Audio--on GeForce: GF116 High Definition Audio Controller, from NVidia 
> Corp.
> --doug

I have the same nVidia card (the 550 Ti) but output vidoe/sound to only 
one device, the HDMI monitor.

While I do not use a dual output like you do, I do understand that you 
need to configure nVidia driver for it to know that you are using 2 outputs.

In the Kickoff>Applications>Applications there will be *NVIDIA* *Server* 
*Settings* entry. With 2 outputs connected to the card these Settings 
should be able to detect both outputs - make sure that the Settings are 
configured to use both outputs.

When nVidia settings are done, check that pulsaudio also has the correct 
settings for the two outputs.


Using openSUSE 12.2 x86_64 KDE 4.9.4 & kernel 3.6.10-1 on a system with-
AMD FX 8-core 3.6/4.2GHz processor
16GB PC14900/1866MHz Quad Channel Corsair "Vengeance" RAM
Gigabyte AMD3+ m/board; Gigabyte nVidia GTX550Ti 1GB DDR5 GPU

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