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sound gone after crash
http://forum.linhes.org/viewtopic.php?f=6&t=14179		 Page 1 of 1
Author:  grumpel [ Wed Feb 14, 2007 9:52 pm ]
Post subject:  sound gone after crash
My TV box:
Athlon 1800xp
768mb ram
WINTV PCI BTTV 878
ASUS A7V133 Onboard Audio snd-via82xx
knoppmyth R5E50

Today i did a fresh install of Knoppmyth and had many problems with the sound like most of the people here :D . It was always the same thing: PCM audio does not work. I can watch dvd+mp3 without problems but liveTV is muted. I can un-mute Line-Audio with a mixer but this is not the solution because i can quit Fluxbox+mythtv and i still get the line-audio...

After some reinstallations the pcm sound suddenly worked! Happy! Rebooting and LiveTV PCM still works! Well, not for long... i ALTCTRL+F5 in to a terminal to reboot because mythtv crashed and since then my pcm sound in LiveTV is gone with the wind.. again.. no matter what i do with the mixer it remains broken.

this is my mythtvbackend.log:
Code:
2007-02-14 20:14:57.375 Using runtime prefix = /usr
2007-02-14 20:14:57.754 New DB connection, total: 1
2007-02-14 20:14:57.871 Connected to database 'mythconverg' at host: localhost
2007-02-14 20:14:57.937 Current Schema Version: 1160
Starting up as the master server.
2007-02-14 20:14:58.030 New DB connection, total: 2
2007-02-14 20:14:58.034 Connected to database 'mythconverg' at host: localhost
2007-02-14 20:14:58.084 EITHelper: localtime offset -8:00:00
2007-02-14 20:14:58.187 New DB connection, total: 3
2007-02-14 20:14:58.250 Connected to database 'mythconverg' at host: localhost
2007-02-14 20:14:58.396 New DB scheduler connection
2007-02-14 20:14:58.419 Connected to database 'mythconverg' at host: localhost
2007-02-14 20:14:58.435 Main::Starting HttpServer
2007-02-14 20:14:58.514 Main::Registering HttpStatus Extension
2007-02-14 20:14:58.577 mythbackend version: 0.20.20060828-3 www.mythtv.org
2007-02-14 20:14:58.665 Enabled verbose msgs:  important general
2007-02-14 20:14:58.820 AutoExpire: Found 1 recorders w/max rate of 72 MiB/min
2007-02-14 20:14:58.842 AutoExpire: Required Free Space: 2.1 GB w/freq: 10 min
2007-02-14 20:15:00.469 Reschedule requested for id -1.
2007-02-14 20:15:00.604 Scheduled 0 items in 0.1 = 0.08 match + 0.06 place
2007-02-14 20:15:00.663 Seem to be woken up by USER
2007-02-14 20:15:40.119 MainServer::HandleAnnounce Monitor
2007-02-14 20:15:40.139 adding: mythtv as a client (events: 0)
2007-02-14 20:15:40.145 MainServer::HandleAnnounce Monitor
2007-02-14 20:15:40.147 adding: mythtv as a client (events: 1)
2007-02-14 20:15:40.157 MainServer::HandleAnnounce Playback
2007-02-14 20:15:40.176 adding: mythtv as a client (events: 0)
2007-02-14 20:15:40.230 TVRec(1): Changing from None to WatchingLiveTV
2007-02-14 20:15:40.233 TVRec(1): HW Tuner: 1->1
strange error flushing buffer ...
2007-02-14 20:15:46.702 Finished recording Unknown: channel 1033
2007-02-14 20:15:46.847 Finished recording Unknown: channel 1033
2007-02-14 20:15:47.035 TVRec(1): RingBufferChanged()
2007-02-14 20:15:47.073 Finished recording Unknown: channel 1033
2007-02-14 20:18:18.105 Expiring Unknown from Wed Feb 14 20:15:40 2007, 3 MBytes, forced expire (LiveTV recording)

what is this strange error flushing buffer.. thing?

thanks
Author:  cliffsjunk [ Thu Feb 22, 2007 12:06 am ]
Post subject: 
I suggest you go to a terminal prompt and run
alsamixer
as super user.

It somes up showing your output configuration. Tab once and you get inputs. Tab again and you get combined ... Left arrow, right arrow, space to turn things on and off, up arrow down arrow to adjust the vertical sliders, M to mute and unmute things.

Start by writing down what you have so you can et back to it. Play around with it till it works. You might turn everything reasonable up to about 70% and see if it works. Turn things off one at a time to find out what works.

Realize that what you want is for the input to come from line in, get converted to PCM, get stored on disk, and a few seconds later come off the disk into the output PCM and finally come out thru the master volume.

You generally do not want your output to come from line in. You generally want it to come from PCM. If you hear things twice a few seconds apart while you are watching live tv then you have line in turned on in your output settings. Turn it off.

Your input needs to come from line in, not mic.

When you get it working, run this as super user
alsactl store
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