Comment 3 for bug 506210

Can confirm this is still an issue. Slightly different error message...

$ lsb_release -rd
Description: Ubuntu 14.04.1 LTS
Release: 14.04

$ apt-cache policy dahdi-linux
dahdi-linux:
  Installed: 1:2.5.0.1+dfsg-1ubuntu4~14.04.2
  Candidate: 1:2.5.0.1+dfsg-1ubuntu4~14.04.2
  Version table:
 *** 1:2.5.0.1+dfsg-1ubuntu4~14.04.2 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     1:2.5.0.1+dfsg-1ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages

$ sudo modprobe dahdi_echocan_oslec
modprobe: ERROR: could not insert 'dahdi_echocan_oslec': Invalid argument

$dmesg

[247247.802830] dahdi_echocan_oslec: disagrees about version of symbol oslec_create
[247247.802840] dahdi_echocan_oslec: Unknown symbol oslec_create (err -22)
[247247.802850] dahdi_echocan_oslec: disagrees about version of symbol oslec_update
[247247.802854] dahdi_echocan_oslec: Unknown symbol oslec_update (err -22)
[247247.802896] dahdi_echocan_oslec: disagrees about version of symbol oslec_free
[247247.802899] dahdi_echocan_oslec: Unknown symbol oslec_free (err -22)