[mythtv-users] snd-bt87x not detected?
Eric Hattemer
eric at hattenator.dyndns.org
Mon Aug 21 08:20:13 UTC 2006
So I've been using mythtv without real problems for a couple of years
now. My machine was running fedora 4 with kernel 2.6.9 for the longest
time, and I couldn't remember why. Fedora kept counting up the kernels,
but I stuck to that version. I finally upgraded to fedora 5 and now I
remember why I stuck to 2.6.9. Every kernel since has made my sound
work poorly if at all.
I have an ATi TV Wonder. It uses the bttv module, and the video works
great. I believe the msp3400 module is involved in the sound. I also
believe I used to run the btaudio module without the bt878 module. When
I upgraded, the bt878 module became autodetected. The bt878 module
seems to fail to load. The snd-bt87x module fails to create an alsa
card. I've been working and searching all day to no avail.
With neither the btaudio nor snd-bt87x modules loaded, I can hear faint
sound if I crank the volume up. I believe I need something to turn the
CD-size output on the card on. I believe what I need is for snd-bt87x
to create an alsa card that I can control the volume on.
Fedora 5 dropped all OSS. There is no btaudio. With bt878 and
snd_bt87x and the CD input cranked all the way up, I could hear some
tiny sound. I compiled my own kernel. I modprobed btaudio without
snd-bt87x. I connected mythtv-setup to /dev/dsp1 (never remember doing
that before). I managed to get good volume audio, but the video files
are not synchronized with audio and video anymore, and the audio
repeats/chops.
I believe the earlier kernel modules magically turned the volume on the
card up loud enough that I could tape it on /dev/dsp using the CD
interface.
Here is the main portion of my modules.conf (I have tried it with either
set of alsa/oss bt audio modules commented):
alias char-major-81 bttv
options char-major-81 card=63 gbuffers=4 automute=0 tuner=2
alias tuner0 tuner
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
alias snd-card-1 snd-bt87x
alias sound-slot-1 snd-bt87x
options snd-card-1 index=1
#alias sound-slot-2 btaudio
#alias sound-service-2-0 btaudio
If I try it with snd-bt87x, I don't end up with any bt card in
[root at hattenator]~# cat /proc/asound/cards
0 [CK8 ]: NFORCE - NVidia CK8
NVidia CK8 with ALC655 at 0xe1004000, irq 193
[root at hattenator]~#
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