[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. 
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https://issues.asterisk.org/view.php?id=14995 
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Reported By:                sruffell
Assigned To:                
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Project:                    DAHDI-linux
Issue ID:                   14995
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
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Date Submitted:             2009-04-29 10:37 CDT
Last Modified:              2009-05-18 10:55 CDT
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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.
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 (0104943) tzafrir (manager) - 2009-05-18 10:55
 https://issues.asterisk.org/view.php?id=14995#c104943 
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The same mechanism is used with dahdi_dynamic drivers, btw.

I think that the fix is to document the issue. And such documentation is
indeed missing. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-18 10:55 tzafrir        Note Added: 0104943                          
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