[Lenovo IdeaPad Y550P] Mute LED indication is inverted

[Anatoly Trosinenko]

Steps to reproduce (on my hardware):
Boot Ubuntu 14.10.
Press "Mute" hardware button several times.

What is expected:
When mute is on button LED is on, when mute is off button LED is off.

What really happens:
Mute button LED state is inverted relatively to what is expected.

Notes:
This bug is reproducible also when booted into the root shell of the recovery mode and switching mute state on/off with alsamixer while playing some audio file to control the actual mute state (button press does not mute/unmute sound in this case, but LED switches on/off in respond to alsamixer).

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-22-generic 3.16.0-22.29
ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
Uname: Linux 3.16.0-22-generic x86_64
ApportVersion: 2.14.7-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: trosinenko 2236 F.... pulseaudio
 /dev/snd/controlC0: trosinenko 2236 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Oct 12 14:02:59 2014
InstallationDate: Installed on 2014-09-12 (29 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140905)
MachineType: LENOVO 20035
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-22-generic root=UUID=6e74f7df-f07c-437a-8adc-a9e69604c36a ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-22-generic N/A
 linux-backports-modules-3.16.0-22-generic N/A
 linux-firmware 1.135
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/13/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 1ECN35WW(V5.09)
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: LENOVO
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnLENOVO:bvr1ECN35WW(V5.09):bd08/13/2010:svnLENOVO:pn20035:pvrLenovoIdeaPadY550P:rvnLENOVO:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: 20035
dmi.product.version: Lenovo IdeaPad Y550P
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Anatoly Trosinenko, thank you for reporting this and helping make Ubuntu better. Could you please test the latest upstream kernel available from the very top line at the top of the page (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.17

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Anatoly Trosinenko (anatoly-trosinenko)]

I have tested using the following packages (their date is 06 Oct 2014):

linux-headers-3.17.0-031700_3.17.0-031700.201410060605_all.deb
linux-headers-3.17.0-031700-generic_3.17.0-031700.201410060605_amd64.deb
linux-image-3.17.0-031700-generic_3.17.0-031700.201410060605_amd64.deb

The problem still present.

I am not sure if it is relevant, but in the bug report "Lenovo Yxx0 mute indicator not work" (https://bugzilla.kernel.org/show_bug.cgi?id=16373) concerning mute LED usage implementation for Lenovo Y550-4CWI, it was stated by Takashi Iwai that LED may be "wrongly on at non-mute time", but that patch was not tested by the original reporter.

[penalvch (penalvch)]

Anatoly Trosinenko, could you please test the latest mainline kernel via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17.1-utopic/ and advise to the results?

[Anatoly Trosinenko (anatoly-trosinenko)]

I have tested the following packages:

linux-headers-3.17.1-031701_3.17.1-031701.201410150735_all.deb
linux-headers-3.17.1-031701-generic_3.17.1-031701.201410150735_amd64.deb
linux-image-3.17.1-031701-generic_3.17.1-031701.201410150735_amd64.deb

The problem still present.

[Anatoly Trosinenko (anatoly-trosinenko)]

The latest patch (154261) from linux-kernel-bugs #16373 fixes this issue.

[penalvch (penalvch)]

Anatoly Trosinenko, did you test it personally on your hardware, and this has shown to fix the issue for you?

As well, could you please provide a direct URL (not just a number) to the bug report you are advising on?

[Anatoly Trosinenko (anatoly-trosinenko)]

I have applied this patch: https://bugzilla.kernel.org/show_bug.cgi?id=16373#c21 on top of stable 3.17.1 kernel from kernel.org (patch said "Hunk #1 succeeded at 5783 (offset 170 lines)."). I tested it personally on my hardware and this patch fixed this bug (at least on my hardware).