[asterisk-users] audio disappeared after ztdummy install

[Norman W. Franke]

All too common and largely undocumented. I had this same problem.

Installing ztdummy changes Asterisk to use it for timing of playback,  
apparently. Removing ztdummy "fixed" the problem. To get it all to  
work, I had to upgrade to to at least kernel 2.6.23.11 (previous  
versions are either missing options are just broken.) After doing  
this, I recompiled ztdummy and it worked. Note that you need to  
enable the various and random kernel flags to make this work,  
generally dealing with the high-performance timer. I enabled:

HPET Timer Support
Enhanced Real Time Clock Support
HPET - High Precision Event Timer
HPET Control RTC IRQ
Allow mmap of HPET

I'm not sure if you can eliminate some of those, but this works for  
me and is stable.

Norman Franke
ASD, Inc.
www.myasd.com


On Mar 30, 2008, at 1:00 PM, asterisk-users-request at lists.digium.com  
wrote:
> This is a reasonably common problem.  ztdummy uses the Linux kernel  
> Real
> Time Clock (RTC) and something is wrong with it.   The solution is to
> recompile your kernel, you should  search the mailing list archives.
> Prepend "site:lists.digium.com" to your Google search to limit your
> search to the mailinglist archives.