[Expired for alsa-driver (Ubuntu) because there has been no activity for
60 days.]
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1394711
Title:
[HDA-Intel - HDA ATI SB, playback] No sound at all with built in
display speakers
Status in alsa-driver package in Ubuntu:
Expired
Bug description:
Problem Description: No sound at monitors built in speakers after
fresh install of Utopic 14.10 Unity Desktop.
Details: After installing Ubuntu 14.10 I had no sound at all from the
speakers in my monitor.
After troubleshooting I determined that the output from the sound system at
the 'green'
connector on the motherboard was fine but was not being delivered to the
monitors speakers.
I then replaced the audio cable from the motherboard to the monitor
which did not help.
I assumed that the analog input of the monitor had gone bad and removed a
HDMI cable from my television
and tried using it from the Video Card to the monitor and the sound in the
monitor speakers worked(e.g.
HDMI with combined Video and Audio signal).
I assumed that the analog input in the monitor had gone bad and bought a new
HDMI cable and used it from
the Video card to the monitor.
This did not work well however as I had to disable the audio chip on the
motherboard to force the system
to use the video card sound functionality to get the "system ready" sound to
work.
There was also a large latency when sending the sound signal through the
video card to the monitor causing the
"system ready" sound and "desktop notifications" to be cut off or not output
at all.
A short time after this I installed the same Utopic 14.10 Unity Desktop onto
another computer with a similar monitor
and had the same result (no sound through the monitor speakers) and
discovered the real cause of the problem.
The cause of the problem became appearant on the second install when the
"system ready" sound was played but
was cut off after a second or so.
After this no more sound at all was output to the monitors speakers.
For some reason in Utopic 14.10 the sound input in the monitor is being
coupled to the video input making it impossible
to use the HDMI input for video and the monitors analog input for sound. The
audio input is "tracking" the video input
in the monitor and the audio input is switching from the analog input to the
HDMI input if a HDMI video cable is being
used.
This lead me to the conclusion that code is switching the analog input in the
monitor to the HDMI audio input based
on HDMI video being used and this was proven by the fact that a VGA (analog)
video cable and analog audio cable/input
works fine as well as a combined HDMI video/audio cable working (not quite
fine but working) and to the conclusion that
someone has coupled the Video and Audio inputs of the video monitor in the
software in Utopic 14.10.
In short the analog audio input in the monitor is being "switched" to the
HDMI audio input if a HDMI video cable is being
used reguardless of it actually carrying audio (e.g. in my case a DVI to HDMI
cable is only used for video and a seperate
analog audio cable is being used to carry the audio signal to the analog
input in the monitor).
Note that this hardware configuration seemed to work fine in Ubuntu 14.04 LTS
(e.g. HDMI video and analog audio) and
just appeared after the fresh installs of 14.10.
Again this problem does not occur if a VGA video cable and and the
aforementioned analog audio cable and input are
used and only occurs if a DVI to HDMI video cable and analog audio
cable/input on the monitor are used.
A HDMI combined video/audio cable works as well other than the undesirable
characteristics described above
(e.g. having to disable onboard audio to force use of the sound on the video
card to get the "system ready" sound
and latency problems with the audio).
Hardware specifics: Motherboards are ASUS Sabertooth and m5a97 with ASUS
mx279h and mx239h monitors respectively.
Monitors are connected via DVI to HDMI video cables and audio is being
delivered via an 1/8" stereo audio cable from the
"green" analog output at the motherboard to the analog input of the monitor.
I am not sure to who this issue belongs because I could not tell who is
switching the audio input in the monitor.
It occurs sometime during the playing of the "system ready" sound (this
timing may be specific to my hardware
configuration and may occur earlier or later depending upon the relative
speed of the system).
I also was not sure what data to collect as I could not tell what software
subsystem (e.g. ALSA or Display) was responsible
for the audio input in the monitor being switched.
Please let me know what data I can collect so this problem can be resolved
and I can get back to using my DVI to HDMI
video cable and analog audio input and still have sound. In the mean time I
have to use the VGA (analog) video cable so
that the analog input to the monitor can be used as the HDMI combined
video/audio cable solution had undesirable
side effects.
This bug report was originated using the ubuntu-bug command from terminal so
I expect that some data was collected
but I am not sure if it will be what is needed to resolve the issue.
Thank You
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: wolfland 4088 F.... pulseaudio
/dev/snd/controlC1: wolfland 4088 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Nov 20 10:36:59 2014
InstallationDate: Installed on 2014-11-20 (0 days ago)
InstallationMedia: WolfLand-Elite-v1.4 14.10 - Release amd64
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:SB failed
Symptom_Card: Turks/Whistler HDMI Audio [Radeon HD 6000 Series] - HDA ATI HDMI
Symptom_DevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: wolfland 4088 F.... pulseaudio
/dev/snd/controlC1: wolfland 4088 F.... pulseaudio
/dev/snd/seq: timidity 1612 F.... timidity
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA ATI SB, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/06/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2301
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: SABERTOOTH 990FX/GEN3 R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr2301:bd01/06/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnSABERTOOTH990FX/GEN3R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
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