Hi! First off, knoppmyth totally rocks. I wasted a good week trying to get Myth to work on SuSE 9.0, then I switched to this. Thanks for the good work!

However, I still have NO sound. I've been searching and have found references on some sticky thread on my problem, but I cannot find it. Here's the lowdown:

It's a MSI MEGA 180 box that has the nForce chipset.
Athalon 2500+ (barton)
512 M ram
PVR 350

Now, I've got everything working, except sound. There is no sound out from either the SPDIF, the analog out on the sound card nor the PVR.

so looking in /etc/modules.conf it says:

alias snd-card-0 snd-intel8x0

which is wrong, so naturally I did an "lsmod" and as expected:

---< snip >---
snd-mixer-oss 11640 0 [snd-pcm-oss]
snd-intel8x0 17636 0
snd-pcm 56000 0 [snd-pcm-oss snd-intel8x0]
snd-timer 14088 0 [snd-pcm]
snd-ac97-codec 32832 0 [snd-intel8x0]
snd-page-alloc 4316 0 [snd-intel8x0 snd-pcm]
snd-mpu401-uart 3168 0 [snd-intel8x0]
snd-rawmidi 13088 0 [snd-mpu401-uart]
snd-seq-device 3824 0 [snd-rawmidi]
snd 27940 0 [snd-pcm-oss snd-mixer-oss snd-intel8x0 snd-pcm snd-timer snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device]
soundcore 3524 3 [snd]

so, I'm thinking I need to compile the nForce linux platform drivers. So, I obtained the latest tar.gz and when I type "Make", the compile fails with the following (parsed for clarity) messages:

/usr/include/asm/mpspec.h:6:25: mach_mpspec.h: No such file or directory

/usr/include/asm/mpspec.h:8: error: `MAX_MP_BUSSES' undeclared here (not in a function)

/usr/include/asm/smp.h:73:26: mach_apicdef.h: No such file or directory

In file included from nvhw.c:16:
nvhw.h:29:27: linux/wrapper.h: No such file or directory

/usr/include/asm/irq.h:16:25: irq_vectors.h: No such file or directory


And a few others. My question is, where did I go wrong, and how does one get the nForce audio to work on knoppmyth?

Thanks!!

-- Ryan

nForce audio works out the box. Do you not get any sound at all? How did you test? You probably just need to recompile the ivtv drivers.

_________________
cesman

When the source is open, the possibilities are endless!

snd-intel8x0 is the proper module for the nforce sound. In knoppmyth as most other recent distrobutions the alsa intel driver is used and works fine.

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Xsecrets

hi,

im new to myth tv and Linux but i think this may help a bit.

i also have an MSI MEGA 180 PC.

I can confirm that playing a vcd i have perfect sound but when watching TV i get only humm out of the pc. So its not the sound card that is the problem.

I have had to manually configure the bttv driver and the tuner setting but im not sure what to check for the sound. If anyone can point me in the right direction i would be greatfull.

Also im currently searching the forums to see what i can come up with.

ok scorpia you said you configured bttv, so I will run on the assumption that you have a software card (not a pvr2(3)50) First thing with a software card you generaly have to use the cable to connect sound out from the card to the soundcard. preferably you want to use the linein port on the soundcard, as this is knoppmyth's default setup. If that is there correctly then you need to use alsamixer to make sure that line in is set as the capture device, or if you are using something else like mic in you will have to set it to the capture source.

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Xsecrets

Okay, after much flailing around, I've gotten sound to work on everything except watching recorded TV and live TV. I can watch mpg movies, and listen to mp3's, but get silence watchin TV.

I've tried plugging the output from the PVR 350 into the input of the sound card.
I've tried tewaking every setting in alsamixer
I've tried setting in test_ioctl -y mute=0 and volume=65535

I've recompiled ivti and intalled over existing (after finally figuring out you had to uncompress the header file -- not well documented ---urhhmmm uhm)

and I've even attempted to follow these directions:
http://www.mythtv.info/moin.cgi/Digital ... .text_html


..... but still have no TV sound! What have I missed??????

Thanks!

-- Ry
(getting very frustrated!)

and you do have sound into the pvr card right? I'm not sure how all that works when you are using svid and not coax, but I do know that svid can't carry sound, so the sound would have to get to the pvr card somehow, and it has to go to the pvr card and not the soundcard, because the pvr card mux's it with the video in hardware to create the mpeg2 file.

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Xsecrets

GEE WIZ. It took me playing and playing to get this. I've read about 10 different troublshooting theads, and a few different HOWTOs.

I didn't want anyting fancy, just TV sound.

I ended up tweaking every setting I could find, until I stumbled across the magic one.

What was it???

I DISABLED in setup:
USE HW XVMC MPEG DECODING
(which was on by default)

everything now works. Thanks for the help anyway!

Where in the setup did you find that setting...I can't seem to find it.

that setting is accessed from the frontend setup>tv>playback

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Xsecrets

Ok thanks for the info. it seems i have it almost sorted. the sound card side is not an issue. i can receive sound there fine. when i start the box the tv picture is fine but the sound is really soft.it is so soft that with the volume on 100% i still can hardly hear it . but i seem to be able to play with things ( change channels , enable picture in picture and it seems that the sound get louder . to the level i would expect.

my guess is i havnt got the correct card selected under the bttv driver . the card i have is a BT878 card with the brand "tv excel" it has FM . i have set card=72 radio=1 pll=1

if anyone has any idea's it would be great.

EDIT: After some more investigation it seems to be a matter of selecting the correct tuner setting. If anyone has an easy way of finding the correct one them please let me know.
Thanks

Scorpia