PCM mixer controls just line out, and Line out mixer missing

[Jarno Suni]

I don't know this PCM really well, but I am used to that it controls volume of several outputs together with other mixers like Master mixer does. However, here PCM controls volume of Line out (i.e. analog out), but does not work with Headphone or Speaker. I would expect there was a specific mixer called Line out for controlling line out volume.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-46-lowlatency 3.13.0-46.79
ProcVersionSignature: Ubuntu 3.13.0-46.79-lowlatency 3.13.11-ckt15
Uname: Linux 3.13.0-46-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Mar 18 14:25:59 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-21 (178 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.1)
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: Dell Inc. OptiPlex 745
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-46-lowlatency root=UUID=d012c1bd-7e56-4035-b321-38d20cb14421 ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-46-lowlatency N/A
 linux-backports-modules-3.13.0-46-lowlatency N/A
 linux-firmware 1.127.11
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/26/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.6.6
dmi.board.name: 0RF703
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.6.6:bd06/26/2011:svnDellInc.:pnOptiPlex745:pvr:rvnDellInc.:rn0RF703:rvr:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 745
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 v4.0 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/v4.0-rc4-vivid/

[Jarno Suni (jarnos)]

I tested by 4.0 rc5 lowlatency kernel and the bug was fixed.

[Jarno Suni (jarnos)]

Correction, PCM mixer is stuck at 100% volume in the upstream kernel. Otherwise it seems to work.

[Jarno Suni (jarnos)]

Now I can change PCM volume again with the upstream kernel. I don't know what kept it from changing some time ago. I didn't reboot.

[Jarno Suni (jarnos)]

I tagged this as fixed in upstream. You may make another bug report about the occasionally jamming PCM volume.

[Jarno Suni (jarnos)]

I tested by wily development version. linux 4.1.0-3-generic. Line Out exists in alsamixer and works as expected.