oss4-dkms 4.2-build2007-2.1: oss4 kernel module failed to build

[David WE1U]

headphone detected; no sound
speaker work ok
Description: Ubuntu 14.04 LTS
Release: 14.04

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: oss4-dkms 4.2-build2007-2.1
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
DKMSKernelVersion: 3.13.0-27-generic
Date: Fri May 30 10:01:25 2014
DuplicateSignature: dkms:oss4-dkms:4.2-build2007-2.1:/var/lib/dkms/oss4/4.2-build2007/build/core/oss_core.c:287:8: error: implicit declaration of function ‘create_proc_entry’ [-Werror=implicit-function-declaration]
InstallationDate: Installed on 2014-04-22 (37 days ago)
InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
PackageVersion: 4.2-build2007-2.1
SourcePackage: oss4
Title: oss4-dkms 4.2-build2007-2.1: oss4 kernel module failed to build
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.