Help required regarding CM8738/C3DX
 

friends i have just installed RH 7.3 IBM system and found that sound card is not working. the CM8738 chipset was identified by the Linux on the system and i found that with lspci command the o/p is given below
___________________________________________________
00:00.0 Host bridge: Intel Corp. 82810E DC-133 GMCH [Graphics Memory Controller Hub] (rev 03)
00:01.0 VGA compatible controller: Intel Corp. 82810E DC-133 CGC [Chipset Graphics Controller] (rev 03)
00:1e.0 PCI bridge: Intel Corp. 82801AA PCI Bridge (rev 02)
00:1f.0 ISA bridge: Intel Corp. 82801AA ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801AA IDE (rev 02)
00:1f.2 USB Controller: Intel Corp. 82801AA USB (rev 02)
01:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C (rev 10)
01:0a.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
___________________________________________________

but when i try to run sndconfig the program recorgnizes it and when it says
"A sound sample will now be played to „_
„_ determine if your sound card has been „_
„_ correctly configured."

the program just doesnt do anything and even if i try to run any mp3 file then also nothing happens

any help


mayank

I looked at this thread for a minute and wondered where I knew that chipset from, and then I remembered...

oh yeah, that's my sound card!

modprobe cmpci

works for me every time, open the GUI and see if the mixer is muted, but I doubt it. Make certain you have the speakers connected to the right port if you have a multiple speaker out set-up like mine.

Also check dmesg, I get dropouts with DMA timing out constantly with this card where sound just refuses to play for about 20 seconds and then is fine for hours. Its annoying me enough so that I think I'm going to swap in a cheap old es1371 card.

Cheers,

Finegan

Cheers,

Thanks,
 

It was really silly :D when i got the real cause of the problem.
one of the two system i was trying have sound card disabled in BIOS and on another the snound card was reported as on PCI slot where as it was onboard. when i corrected them things really changed now i have them in working order

Thanks for the help

Mayank

Good, whew, sorry for the gimp list there, I was a little confused because this one is so normally out of the box up.

I nailed the problem with my DMA dropout issues too: this card's nifty extra kernel features do not play nice with ARts, so if you ever pull a recompile for fun and enable all of the cool extra stuff, kill ARts.

Cheers,

Finegan

help CM8738
 

friends i have just installed RH 7.3 IBM system and found that sound card is not
working. the CM8738 chipset was identified by the Linux on the system and i
found that with lspci command the o/p is given below
___________________________________________________
00:00.0 Host bridge: Intel Corp. 82810E DC-133 GMCH [Graphics Memory Controller
Hub] (rev 03)
00:01.0 VGA compatible controller: Intel Corp. 82810E DC-133 CGC [Chipset
Graphics Controller] (rev 03)
00:1e.0 PCI bridge: Intel Corp. 82801AA PCI Bridge (rev 02)
00:1f.0 ISA bridge: Intel Corp. 82801AA ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801AA IDE (rev 02)
00:1f.2 USB Controller: Intel Corp. 82801AA USB (rev 02)
01:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C
(rev 10)
01:0a.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
___________________________________________________

but when i try to run sndconfig the program recorgnizes it and when it says
"A sound sample will now be played to ?_
?_ determine if your sound card has been ?_
?_ correctly configured."

the program just doesnt do anything and even if i try to run any mp3 file then
also nothing happens


I have enabled the onboard soundcard from bios.
How can i check the irq & change it it is conflicting ?

any help

Swapnendu

Its the cmpci module, RH's soundconfig might have just gotten a stupid attack, for instance, here's mine too:

00:0f.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)

/sbin/modprobe cmpci

Then check under whatever GUI Mixer prog you're using and make certain it didn't load with everything muted. If it doesn't load the module on the next boot, you can just sidestep RedHat's flakiness by putting the modprobe line in the file /etc/rc.d/rc.local

Cheers,

Finegan

finegan ur suggestion didn't work ..
I checked the mixer , it is not muted ..

what could be problem now ?
my OS RHat 7.3 detects my sound card correctly as CM8738 but i

can't play any mp3's, wav files & other audio files..
the time bar im mp3 songs doesn't even move !!

I have enabled the onboard soundcard from bios.
How can i check the irq & change it it is conflicting ?

Also KDE some times shows an error that Sound Server failed..using NULL ....

Okay, is indeed the module loaded:

/sbin/lsmod

Should have a list somewhat like:
Cheers,

Finegan

Yes the module is loaded as cmpci..initially when i start KDE it says that /dev/dsp can't be found..so using null..