[asterisk-bugs] [DAHDI-linux 0014995]: DAHDI_ATTACH_ECHOCAN failed on channel 1: Invalid argument(22)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=14995 
====================================================================== 
Reported By:                sruffell
Assigned To:                
====================================================================== 
Project:                    DAHDI-linux
Issue ID:                   14995
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   text
Priority:                   normal
Status:                     acknowledged
JIRA:                        
Reviewboard Link:            
====================================================================== 
Date Submitted:             2009-04-29 10:37 CDT
Last Modified:              2010-09-30 19:47 CDT
====================================================================== 
Summary:                    DAHDI_ATTACH_ECHOCAN failed on channel 1: Invalid
argument(22)
Description: 
On Gentoo, it appears that the kernel is not configured to allow auto
loading of modules.  This prevents the DAHDI_ATTACH_ECHOCAN from loading
the software echo canceler requested in the /etc/dahdi/system.conf file,
and the result is an error like:

"DAHDI_ATTACH_ECHOCAN failed on channel 1: Invalid argument(22)" 

To work around this the "dahdi_echocan_<name of echocan>" could be added
to /etc/dahdi/modules

I.e.  If you have mg2 configured as the echo canceler in
/etc/dahdi/system.conf, add the line "dahdi_echocan_mg2" to
/etc/dahdi/modules.
====================================================================== 

---------------------------------------------------------------------- 
 (0127572) mancy (reporter) - 2010-09-30 19:47
 https://issues.asterisk.org/view.php?id=14995#c127572 
---------------------------------------------------------------------- 
same problem happened to me after building the dahdi v 2.4 driver from
source code

i've tried to use dahdi_echocan_oslec but still DAHDI_ATTACH_ECHOCAN

i fixed this by using mg2 echo cancellation
it doesn't matter if i put dahdi_echocan_mg2 or not, no error shown in
both cases

system: centos kernel 2.6.18-194.3.1.el5 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-09-30 19:47 mancy          Note Added: 0127572                          
======================================================================