Public bug reported:
I've upgraded from ubuntu 13.10 and sound stopped working properly. It
works in general. But mutes itself for small period of time in random
intervals.
I've looked at alsamixer and it shown what once in a while some of the
parameters got to the lowest level and then returning to normal after
some time. It is reproing on Speaker. But also Internal Mic Boost jumps
from 100% to 0% and then back to 100%.
I was not able to fine anything in logs. I've also tried to purge
pulseaudio and alsa-base packages and re-installing them again. Nothing
helps.
But I was able to find workaround. Audio works just fine with old
kernels. I've tried with 3.5.0-15 and 3.5.0-27. It works with both
kernels. I've also tried newest kernel from next ubuntu version.
3.15.0-031500rc5 - audio is not working in new kernel.
So seems like something was broken in kernel since ubuntu 13.10.
BTW, when sound mutes on speaker, headphones are still working. So
looks like alsamixer reports volumes correctly.
$ uname -r
3.13.0-27-generic
$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
$ lspci -v | grep -A7 -i "audio"
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
Controller (rev 03)
Subsystem: Lenovo ThinkPad T61/R61
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f822 (64-bit, non-prefetchable) [size=16K]
Capabilities:
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express
Port 1 (rev 03) (prog-if 00 [Normal decode])
$ dmesg | egrep -i '(alsa|sound|snd)'
[ 241.137236] snd_hda_intel :00:1b.0: irq 46 for MSI/MSI-X
[ 241.627491] input: HDA Intel Headphone as
/devices/pci:00/:00:1b.0/sound/card0/input10
[ 241.627767] input: HDA Intel Mic as
/devices/pci:00/:00:1b.0/sound/card0/input9
[ 241.628046] input: HDA Intel Dock Mic as
/devices/pci:00/:00:1b.0/sound/card0/input8
$ sudo lshw -c multimedia
*-multimedia
description: Audio device
product: 82801H (ICH8 Family) HD Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@:00:1b.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:46 memory:f822-f8223fff
$ amixer -c 0 scontents > normal.txt
SEE Attachment.
$ amixer -c 0 scontents > muted.txt
SEE Attachment.
$ amixer -c 0 scontents > normalagain.txt
SEE Attachment.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USERPID ACCESS COMMAND
/dev/snd/controlC0: ghisguth 2519 F pulseaudio
ghisguth 3906 F pulseaudio
ghisguth 15548 F alsamixer
Date: Wed May 28 22:50:29 2014
HibernationDevice: RESUME=UUID=78076f7a-8340-428e-894b-ce095d0d278e
InstallationDate: Installed on 2010-04-19 (1501 days ago)
InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406.1)
MachineType: LENOVO 76693JG
PccardctlIdent:
Socket 0:
no product info available
PccardctlStatus:
Socket 0:
no card
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-27-generic
root=/dev/mapper/ubuntu-root ro quiet splash crashkernel=384M-:128M
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.13.0-27-generic N/A
linux-backports-modules-3.13.0-27-generic N/A
linux-firmware 1.127.2
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-25 (33 days ago)
dmi.bios.date: 10/22/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7NET29WW (1.10 )
dmi.board.name: 76693JG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr7NET29WW(1.10):bd10/22/2007:svnLENOVO:pn76693JG:pvrThinkPadX61s:rvnLENOVO:rn76693JG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 76693JG
dmi.product.version: ThinkPad X61s
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug trusty
** Attachment added: "volume dump - before, during the glitch, after it
returned to normal"
https://bugs.launchpad.net/bugs/132
