Public bug reported:
I have an annoying quiet noise in my headphones. It is low, so one hears it
only when there is no sound.
The noise is significantly decreased after applying with the HDA Analyzer the
following patch:
iff for codec 0/0 (0x10ec0280):
---
+++
@@ -92,17 +92,17 @@
Control: name="Beep Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=1, idx=4, ofs=0
Amp-In caps: ofs=0x17, nsteps=0x1f, stepsize=0x05, mute=1
Amp-In vals: [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80] [0x80 0x80]
Connection: 5
0x18 0x19 0x1a 0x1b 0x1d
Node 0x0c [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
- Amp-In vals: [0x00 0x00] [0x00 0x00]
+ Amp-In vals: [0x00 0x00] [0x80 0x80]
Connection: 2
0x02 0x0b
Node 0x0d [Audio Mixer] wcaps 0x20010b: Stereo Amp-In
Amp-In caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
Amp-In vals: [0x80 0x80] [0x80 0x80]
Connection: 2
0x03 0x0b
Node 0x0e [Vendor Defined Widget] wcaps 0xf00000: Mon
I still can hear very low noise. In order to get rid of this one, I have
to apply:
Diff for codec 0/0 (0x10ec0280):
---
+++
@@ -147,17 +147,17 @@
Unsolicited: tag=0x00, enabled=0
Power: setting=D3, actual=D3
Connection: 2
0x0c 0x0d*
Node 0x15 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
Control: name="Headphone Playback Switch", index=0, device=0
ControlAmp: chs=3, dir=1, idx=0, ofs=0
Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
- Amp-Out vals: [0x00 0x00]
+ Amp-Out vals: [0x80 0x80]
Pincap 0x0001001c: OUT HP EAPD Detect
EAPD 0x2: EAPD
Pin Default 0x0421101f: [Jack] HP Out at Ext Right
Conn = 1/8, Color = Black
DefAssociation = 0x1, Sequence = 0xf
Pin-ctls: 0xc0: OUT HP
Unsolicited: tag=0x01, enabled=1
Power: setting=D0, actual=D
But then I don't have sound at all. I presume, with the last patch I
basically switch of the headphones output completely.
I think, it would be a good idea to add the 'HP ZBook' model to the SND-
HDA-INTEL driver so it could automatically apply the above settings.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
NonfreeKernelModules: openafs fglrx
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: afiergol 2766 F.... pulseaudio
afiergol 3717 F.... alsamixer
/dev/snd/controlC1: afiergol 2766 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Apr 13 10:24:44 2016
InstallationDate: Installed on 2015-04-02 (376 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
PackageArchitecture: all
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/26/2016
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M70 Ver. 01.14
dmi.board.name: 2253
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 03.10
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrM70Ver.01.14:bd01/26/2016:svnHewlett-Packard:pnHPZBook15G2:pvrA3008CD10003:rvnHewlett-Packard:rn2253:rvrKBCVersion03.10:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ZBook 15 G2
dmi.product.version: A3008CD10003
dmi.sys.vendor: Hewlett-Packard
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
** Attachment added: "Output of alsa-info.sh (after applying the first HDA
Analyzer patch)."
https://bugs.launchpad.net/bugs/1569760/+attachment/4635209/+files/alsa-info.txt.lRHQTLlCHg
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1569760
Title:
bacground noise from headphones
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1569760/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
