Onboard Sound disabled after soundcard instal

April 22, 2010 at 16:25:45
Specs: Windows XP
I have installed a CMedia Sound Card (5.1) but
now I can no longer access and hear my
onboard sound. In Sound Manager it is also
not listed. When I remove the sound card, the
onboard sound works again.

I would like both of these to work as I need to
stream two different sounds to two different

Noteably in the Device Manager there is a ?
next to PCI Serial Port... would this have
something to do with it? I tried the option
Updating driver from Internet but it could not
find any hence the ? remained...

Please advise soonest.

See More: Onboard Sound disabled after soundcard instal

April 22, 2010 at 16:41:09
your bios must be disabling the onboard sound chip when it detects the PCI card. check your bios configuration and look for something related to onboard sound.

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April 22, 2010 at 19:11:48
I have tried this, but it is not working for me...???

What I have done:-
1. Disable AC97 in BIOS (disappears from device manager)
2. Install C-Media Sound Card (displays in dev manager)

At this point AC97 no longer appears in the BIOS and therefor
I cannot enable (auto) it.

When I take out the soundcard, AC97 appears.
I set it to 'Auto' and it appears in Dev Manager

When I put back the soundcard... only the soundcard is
displayed in Dev Manager...

Catch 22?

Please advise soonest...

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April 22, 2010 at 19:16:23
Go to the Control Panel > Sounds and Audio devices > Audio tab, and see if they are both available there.

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April 22, 2010 at 19:24:14
No they are not....

When the soundcard is in... only the CMedia shows
When I take out the soundcard, AC97 shows

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April 22, 2010 at 19:30:59
DO NOT install the sound card in the last PCI slot on the end closest to the center of the mboard. That slot is forced to share it's IRQ with the video, and anything other than a PCI video card is likely to not work properly in that last PCI slot.

You can install more than one sound adapter in Win 95 and up, but only one sound adapter can be used at a time by Windows, and only one sound adapter uses resources at a time. The sound drivers and associated software must be installed for all the sound adapters you want to be able to use. The sound adapter you last installed the drivers and associated software for becomes the default sound adapter in Windows, but you can change which default sound adapter Windows uses in Control Panel - Classic View - Sounds and Audio Devices - Audio. You usually DO NOT have to disable the onboard sound adapter in the bios Setup when you install another sound adapter, (although you can if you never want to use it) , and the bios does not do that automatically.

You DO NOT install drivers for a sound adapter device while booting into Windows, if the software for the device has not been installed yet - when Windows detects a generic device or New Hardware while booting, you allow it to search for drivers, it doesn't find any, and it wants you to show it the location of the drivers - CANCEL that, continue on to the desktop, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.

If you DID install drivers that way, go to Control Panel - Classic View - Add/Remove Programs and Un-install the software you installed, reboot, DO NOT install drivers while booting, and install the software the right way !

The same applies no matter when Windows finds New Hardware !

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April 22, 2010 at 20:01:25
I have used the proper way... having said that, my PCI slot still
shows ? ... whether I search the CD or Internet using Windows
Update, it cannot be found. Should l continue with a manual
search and download and how will I know I am downloading the
correct PCI driver?

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April 22, 2010 at 20:46:29
In case you haven't figured it out by what I've already told you, only one sound adapter shows up at a time in Device Manager, and only one sound adapter produces sound at a time.
If both adapters show up in Control Panel - Classic View - Sounds and Audio Devices - Audio, (click on the listed sound adapter to see the drop down list with the other one) then you can change the default sound adapter there, and that one will show up in Device Manager, and be the one that produces sound.
If you do NOT see both sound adapters there, if you installed the sound card in the last PCI slot, you need to install it in a different PCI slot.

"Noteably in the Device Manager there is a ?
next to PCI Serial Port... would this have
something to do with it? "

That's about something else.

I searched and found that error can be because...

- If your mboard was made by Intel, or has an Intel main chipset, you need to load the iAMT drivers.

"Error on PCI Serial Port
IntelĀ® Desktop Boards that include the IntelĀ® Active Management Technology (iAMT) feature may display a yellow exclamation mark on a PCI Serial Port in Device Manager.

To eliminate the error in Device Manager, you must install the iAMT drivers. You are not required to enable iAMT in the BIOS.

The iAMT drivers can be installed from either the CD or DVD that came with the desktop board or from Intel's Download Center "

("Download Center" is a highlighted link to:)

If you DO have an Intel main chipset mboard, if you don't have the CD that came with the mboard, tell us what it's model is.

- if you have a dial-up modem, built into the mboard, or on a card in a slot, and you haven't installed drivers for it, sometimes you can get that error.

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