Have a similar issue with my HP Pavilion DV6 Laptop under both Ubuntu
16.04 and Ubuntu Mate 16.04 using pulse audio.
Video still displays out of HDMI port to TV but Audio hardware device
disappears from sound applet (in my case "mate-volume-control-applet").
Curiously the HDMI device is visible at some level to aplay
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: 92HD81B1X5 Analog [92HD81B1X5 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
Work-Around (temporarily SOLVES issue ... until the next time)
-----------
I have developed the following work-around (for Mate ... but you can adapt it
to standard Ubuntu) that recovers the HDMI sound (perhaps it may help users get
by and/or some smart developer to track down the root cause):-
Step 0: Open your terminal ...
Step 1: Kill the (non-detecting) volume control process
$ kill -9 $(ps aux |grep -v 'sudo\|grep' |grep -e "mate-volume-control-applet"|
awk {'print $2'})
Step 2: Relaunch the volume-control process
$ sudo mate-volume-control-applet
Step 3: Then at the blinking terminal type
^Z
Step 4: Now complete the manual terminal tty disassociation by typing
$ bg
Step 5: Now when you right click on your "mate-volume-control-applet" go to >
Sound Preferences > Hardware Tab > Profile Drop Down ... should now show all
the available sound devices including the HDMI output to the TV.
-----------
The volume control applet just seems to forget about the sound hardware, never
refreshes nor updates even with the HDMI lead being disconnected and
reconnected.
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1377653
Title:
HDMI sound output not detected / NVIDIA optimus laptop
Status in alsa-driver package in Ubuntu:
Confirmed
Status in pulseaudio package in Ubuntu:
Confirmed
Bug description:
Hi,
not sure if this is an alsa or nvidia/nouveau bug.
HDMI audio output doesn't appear in sound settings output panel.
Audio works well on internal speakers, but it seems there is no way to make
it output to hdmi...
The laptop has optimus NVIDIA+Intel.
The behaviour is the same with nouveau or nvidia proprietary driver.
Please let me know if further testing is required
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: sam 2295 F.... pulseaudio
CurrentDesktop: Unity
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission
denied
Date: Sun Oct 5 17:05:35 2014
InstallationDate: Installed on 2014-04-21 (166 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/02/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N56VZ.215
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N56VZ
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrN56VZ.215:bd11/02/2012:svnASUSTeKCOMPUTERINC.:pnN56VZ:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN56VZ:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: N56VZ
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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