Summary:ASTERISK-09806: Playback does not produce any sound in channel
Reporter:Andri O (andri)Labels:
Date Opened:2007-07-05 04:30:21Date Closed:2011-06-07 14:02:46
Versions:Frequency of
Description:Asterisk 1.4.6 (locally compiled) on Ubuntu Feisty (7.04) running on Dual Xeon 3050.

All extensions running any sort of Playback are muted. Tried through IAX2 and SIP as well as CAPI > IAX trunk from the old Asterisk machine I'm migrating from.

Channels otherwise work perfectly for calls, music on hold (both wav and mp3) and dtmf.

I'm running ALAW as a primary codec, also supporting gsm and ULAW. I've tried replacing the sound files with the native ALAW files from AstLinux without any luck (except with the alaw files i can hear a bzz in the beginning, then nothing).

Started with 1.4.5, then upgraded to 1.4.6 no effect.
Comments:By: Andri O (andri) 2007-07-05 04:51:02

Operating system is 64bit, might be relevant

By: Joshua C. Colp (jcolp) 2007-07-05 07:56:20

Do you have an unconfigured zaptel card installed? Can you produce an rtp debug of a SIP attempt?

By: Andri O (andri) 2007-07-05 09:17:47

Consider this solved (or at least worked around).

Jul  2 06:37:26 crow kernel: [4185840.292995] rtc: lost some interrupts at 1024Hz.

This was causing the problems or more specifically that fine Dell machine that was bought behind my back didn't send out all the interrupts the kernel was expecting.

Setting acpi=off as a kernel option on boot solved the issue for me.

By: Joshua C. Colp (jcolp) 2007-07-05 09:21:26

Closed as this is a hardware issue which led to bad timing.