[mythtv-users] Mythtv 0.24 Acer Revo ALSA WriteAudio buffer underruns

[Niklas Brunlid]

Was this ever resolved? Is there a bug filed in Trac?

I see the same on my combined backend/frontend, whenever a recording
finishes while I'm watching something the picture freezes for a few seconds,
sometimes a lot longer if 2 or 3 recordings finish at the same time, and in
the standard frontend log I see:

2011-03-22 20:57:59.996 TV: ASK_RECORDING 2 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:58:00.577 ALSA, Error: WriteAudio: buffer underrun
2011-03-22 20:58:42.380 ALSA, Error: WriteAudio: buffer underrun
2011-03-22 20:58:58.982 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no
longer on screen.
2011-03-22 20:58:59.622 TV: ASK_RECORDING 4 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:00.006 TV: ASK_RECORDING 9 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:00.006 TV: ASK_RECORDING 9 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:00.006 TV: ASK_RECORDING 5 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:00.070 TV: ASK_RECORDING 8 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:00.070 TV: ASK_RECORDING 8 29 0 0 hasrec: 0 haslater: 0
2011-03-22 20:59:37.411 ALSA, Error: WriteAudio: buffer underrun
2011-03-22 20:59:40.843 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no
longer on screen.
2011-03-22 21:00:04.877 ALSA, Error: WriteAudio: buffer underrun
2011-03-22 21:00:13.864 PlaybackBox: Ignoring PREVIEW_SUCCESS, item no
longer on screen.
2011-03-22 21:00:15.995 ALSA, Error: WriteAudio: buffer underrun

/ Niklas

On 9 March 2011 18:08, <pnetherwood at email.com> wrote:

> Further to Josu's mail, run my edited version in my earlier post. The
> query below was the first query in my post that uses temporary tables (i.e.
> sched_temp_record) and you'll get errors about it not being found. My last
> query can run stand alone. The result should be a list of programs that are
> scheduled to be recorded next. If you put the keyword 'explain' before
> select it will give you the explain plan in my earlier mail.
>
>
>  -----Original Message-----
> From: Josu Lazkano <josu.lazkano at gmail.com>
> To: Discussion about MythTV <mythtv-users at mythtv.org>
> Sent: Tue, Mar 8, 2011 3:20 pm
> Subject: Re: [mythtv-users] Mythtv 0.24 Acer Revo ALSA WriteAudio buffer
> underruns
>
>  Hello again, I try to execute the SQL command this way:
>
>
>
>
> $ mysql -u mythtv -pPASS mythconverg
>
>
>
>
> SELECT c.chanid, c.sourceid, p.starttime, p.endtime, p.title,
>
>
> p.subtitle, p.description, c.channum, c.callsign, c.name,
>
>
> oldrecduplicate, p.category, sched_temp_record.recpriority,
>
>
> sched_temp_record.dupin, recduplicate, findduplicate,
>
>
> sched_temp_record.type, sched_temp_record.recordid, p.starttime -
>
>
> INTERVAL sched_temp_record.startoffset minute AS recstartts, p.endtime
>
>
> + INTERVAL sched_temp_record.endoffset minute AS recendts,
>
>
> p.previouslyshown, sched_temp_record.recgroup,
>
>
> sched_temp_record.dupmethod, c.commmethod, capturecard.cardid,
>
>
> cardinput.cardinputid,p.seriesid, p.programid, p.category_type,
>
>
> p.airdate, p.stars, p.originalairdate, sched_temp_record.inactive,
>
>
> sched_temp_record.parentid, (CASE sched_temp_record.type WHEN 6 THEN
>
>
> sched_temp_record.findid WHEN 9 THEN to_days(date_sub(p.starttime,
>
>
> interval time_format(sched_temp_record.findtime, '%H:%i')
>
>
> hour_minute)) WHEN 10 THEN floor((to_days(date_sub(p.starttime,
>
>
> interval time_format(sched_temp_record.findtime, '%H:%i')
>
>
> hour_minute)) - sched_temp_record.findday)/7) * 7 +
>
>
> sched_temp_record.findday WHEN 7 THEN sched_temp_record.findid ELSE 0
>
>
> END) , sched_temp_record.playgroup, oldrecstatus.recstatus,
>
>
> oldrecstatus.reactivate, p.videoprop+0, p.subtitletypes+0,
>
>
> p.audioprop+0, sched_temp_record.storagegroup, capturecard.hostname,
>
>
> recordmatch.oldrecstatus, sched_temp_record.avg_delay,
>
>
> c.recp0.24.0+fixes.20110206.1a69c92riority + cardinput.recpriority +
>
>
> (cardinput.cardinputid = sched_temp_record.prefinput) * 2 AS
>
>
> powerpriority FROM recordmatch INNER JOIN sched_temp_record ON
>
>
> (recordmatch.recordid = sched_temp_record.recordid) INNER JOIN program
>
>
> AS p ON ( recordmatch.chanid = p.chanid AND recordmatch.starttime =
>
>
> p.starttime AND recordmatch.manualid = p.manualid ) INNER JOIN channel
>
>
> AS c ON ( c.chanid = p.chanid ) INNER JOIN cardinput ON (c.sourceid =
>
>
> cardinput.sourceid) INNER JOIN capturecard ON (capturecard.cardid =
>
>
> cardinput.cardid) LEFT JOIN oldrecorded as oldrecstatus ON (
>
>
> oldrecstatus.station = c.callsign AND oldrecstatus.starttime =
>
>
> p.starttime AND oldrecstatus.title = p.title ) WHERE p.endtime >=
>
>
> NOW() - INTERVAL 1 DAY ORDER BY sched_temp_record.recordid DESC;
>
>
>
>
> But I have no any output and there is no buffer stop on the frontend,
>
>
> how can I test it?
>
>
>
>
> Sorry for my stupid questions, but I want to test to help fixing this
>
>
> problem. I have FE/BE on a Nvidia ION 330 board.
>
>
>
>
> Kind regards.
>
>
>
>
> --
>
>
> Josu Lazkano
>
>
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>
>
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>
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>
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>
>
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>
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