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Old 03-29-2007, 11:45 PM   #1
Bob Jones
Registered: Mar 2007
Posts: 34

Rep: Reputation: 15
No Sound MythTV, TvTime, Xawtv, etc. in Fedora 6

I have read many threads on this issue and I cannot seem to resolve it . . . hence the new thread. Here is what is going on:

I do not get sound from MythTV, TvTime, Xawtv, Kaffeine, etc. when viewing TV. In MythTV specifically, I can watch videos (MPEGs) and listen to music (MP3, OGG, etc.) with sound just fine. When viewing TV - no sound. Same goes for the other TV viewing programs like TVtime and Xawtv. The video is pretty good, but no sound. I can also hear sound when I play music through other multimedia players such as xmms, etc.

I started with a Hauppauge TV tuner card - pretty old, maybe a couple years that ran off the 848 chipset series (I believe) - bttv. This card had an audio out, which I used to connect a cord to an audio in port on my motherboard. My motherboard was the latest nForce board for AMD in 2005 - I think it is an nForce4. I think (and this is only a guess) that the sound went bad after I installed the advanced nVidia drivers to do some 3D gaming through wine. Unable to get sound working, I bought a new TV tuner card - Pinnacle HDTV Pro Stick - and the sound initially worked pretty well (some scratching) after I finally got the v4l-vbd drivers working. Upon the next restart - no sound. My suspicion is that the ALSA drivers do not load both the nVidia sound and the sound from either the TV tuner cards.

My system is completely updated through yum. Here are the rest of my system specifications:

OS: Fedora Core 6_x64
Processor: AMD 64
Kernel Version: 2.6.20-1.2933.fc6

Audio configuration:
nVidia Module: snd-intel8x0
Em28xx Audio Module: em28xx-audio

ALSA driver: 1.0.14

I'm not really sure where to go from here or what other information will be helpful. I have done a lot of tinkering with the MythTV settings - but I think the problem is external to the program (because TVtime and xawtv both do not work). If more info is needed please let me know and I will post. I am fairly new so please post the commands.

I hate Microsoft based systems and would hate to go back. Any help is greatly appreciated.

Thanks in advance!
Old 03-30-2007, 01:53 AM   #2
Bob Jones
Registered: Mar 2007
Posts: 34

Original Poster
Rep: Reputation: 15
Here's is what my system outputs when I type in: lsmod:

[root@localhost ~]# lsmod
Module Size Used by
snd_seq_midi 17857 0
autofs4 32457 2
hidp 35265 2
rfcomm 57577 0
l2cap 41281 10 hidp,rfcomm
bluetooth 74053 5 hidp,rfcomm,l2cap
sunrpc 181513 1
dm_mirror 31233 0
dm_mod 70993 1 dm_mirror
video 26697 0
sbs 25361 0
i2c_ec 14017 1 sbs
dock 19809 0
button 17249 0
battery 19273 0
asus_acpi 27117 0
backlight 15681 1 asus_acpi
ac 14281 0
ipv6 339233 18
lp 23185 0
lgdt330x 17796 1
em28xx_audio 16132 0
mt2060 14084 0
mt352 16008 0
zl10353 15752 0
em2880_dvb 22916 0
dvb_core 93616 2 lgdt330x,em2880_dvb
snd_bt87x 25829 0
xc3028_tuner 16896 1
snd_intel8x0 44905 1
snd_ac97_codec 117401 1 snd_intel8x0
ac97_bus 11457 1 snd_ac97_codec
snd_seq_dummy 12613 0
snd_seq_oss 41153 0
tvp5150 28048 0
tuner 75700 0
snd_seq_midi_event 16705 2 snd_seq_midi,snd_seq_oss
floppy 72201 0
shpchp 42845 0
nvidia 7771736 32
snd_seq 64225 6 snd_seq_midi,snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
k8temp 14785 0
em28xx 107488 2 em28xx_audio,em2880_dvb
ide_cd 49505 0
k8_edac 25601 0
hwmon 12233 1 k8temp
pcspkr 11969 0
edac_mc 34385 1 k8_edac
ns558 14145 0
ohci1394 45209 0
forcedeth 53577 0
parport_pc 38377 1
snd_pcm_oss 53345 0
compat_ioctl32 17152 1 em28xx
gameport 26065 2 ns558
ieee1394 368857 1 ohci1394
parport 49485 2 lp,parport_pc
snd_mixer_oss 25537 1 snd_pcm_oss
ir_common 49796 1 em28xx
videodev 36736 1 em28xx
v4l2_common 28288 5 tvp5150,tuner,em28xx,compat_ioctl32,videodev
v4l1_compat 20356 2 em28xx,videodev
tveeprom 26384 1 em28xx
snd_pcm 93641 5 em28xx_audio,snd_bt87x,snd_intel8x0,snd_ac97_codec,snd_pcm_oss
i2c_nforce2 14785 0
snd_timer 32969 2 snd_seq,snd_pcm
snd_page_alloc 18897 3 snd_bt87x,snd_intel8x0,snd_pcm
cdrom 44265 1 ide_cd
snd_mpu401 18793 0
snd_mpu401_uart 17985 1 snd_mpu401
snd_rawmidi 35521 2 snd_seq_midi,snd_mpu401_uart
snd_seq_device 17109 5 snd_seq_midi,snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd 72553 16 em28xx_audio,snd_bt87x,snd_intel8x0,snd_ac97_codec,snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd _pcm,snd_timer,snd_mpu401,snd_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore 17505 1 snd
i2c_core 32833 12 i2c_ec,lgdt330x,mt2060,mt352,zl10353,xc3028_tuner,tvp5150,tuner,nvidia,em28xx,tveeprom,i2c_nforce2
sata_nv 29509 0
libata 120553 1 sata_nv
sd_mod 30273 0
scsi_mod 165529 2 libata,sd_mod
ext3 142545 3
jbd 74033 1 ext3
ehci_hcd 42069 0
ohci_hcd 30681 0
uhci_hcd 34273 0
[root@localhost ~]#
Old 04-09-2007, 01:05 AM   #3
Bob Jones
Registered: Mar 2007
Posts: 34

Original Poster
Rep: Reputation: 15
This is a follow up on my previous post:

I reconfigured to use my Huappauge bt878 card. The bt878 card has a line out (which is used as an "output" that connects to the "line in" on my sound card. Then the output goes to my speakers.

I bypassed the "output" / "line in" step to try and isolate my problem. My speakers are directly connected to the "output" on the Hauppauge bt878 card. This way I know if I am even getting any output from the capture card.

In this setup I can play and hear live tv perfectly fine. Does anyone know how to access the tvtime settings? If I could check to see what device tvtime is outputting audio to . . . then I could probably properly configure mythtv.

Same result as before. No sound from the output. Since tvtime works perfectly well, I'm guessing that I am reading the devices wrong somehow.

Here is my sound card setup:

0 nVidia Corporation CK804 AC'97 Audio Controller
1 PNPb006 PNPb006
2 Empia Em28xx Audio
3 Brooktree Bt878

In MythTV I have the option of selecting from:

Audio output device:

Mixer Device:

I'm assuming that the numeral at the end of each Audio and Mixer device corresponds to the number in my sound card detection setup?? So I would think that if I want to get sound output from my bt878 card (3 Brooktree Bt878) I would just set everything to: "/dev/dsp3" and "/dev/mixer3" - but this does not work.

I'm running Fedora Core 6
MB: Asus A8N-SLI (nForce4)
Audio: Realtek ALC850 8-Channel CODEC

Any ideas?
Old 07-16-2007, 01:06 AM   #4
Bob Jones
Registered: Mar 2007
Posts: 34

Original Poster
Rep: Reputation: 15
Still haven't resolved this issue yet . . . any ideas?


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