Sound not working on Dell Latitude E7440

[shclim]

I have just install the daily image of Ubuntu 14.04 (16 Feb 2014) on my Dell Latitude E7440 laptop and noticed that there is no sound coming out of the speakers.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-8-generic 3.13.0-8.28 [modified: boot/vmlinuz-3.13.0-8-generic]
ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
Uname: Linux 3.13.0-8-generic x86_64
ApportVersion: 2.13.2-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: scott 1915 F.... pulseaudio
 /dev/snd/controlC0: scott 1915 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Feb 16 12:50:56 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-02-16 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140216)
MachineType: Dell Inc. Latitude E7440
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic root=UUID=f69dd488-ca94-48d7-997b-7c5b47d75676 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-8-generic N/A
 linux-backports-modules-3.13.0-8-generic N/A
 linux-firmware 1.124
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/02/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0PPXP5
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/02/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn0PPXP5:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7440
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.13 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc3-trusty/

[shclim (shclim)]

Joseph Salisbury, after reporting this bug I tried changing some settings in alsamixer but it didn't seem to fix the issue. Then, after a reboot it started working although I didn't notice straight away so I'm not exactly sure what has made it work. This also happened on 13.10 -- i.e., it needed some encouragement before it starting working.

I've just installed and tested kernel 3.14-rc4 and the sound is also working fine.

Once 3.14 is included on the daily LiveCD I'll re-test to see if I still get 'no sound' on the fresh/clean image.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]