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Message #88474
[Bug 1402194] Re: PCI/internal sound card not detected
The sound system has now taken on a new personality of its own.
The internal speakers appear in the "Play sound through" list of Output
pane of System Settings > Sound along with Headphones, built-in audio
(even though there are no headphones connected. The Test Sound button
works on both these items but produces the same test through the
internal speakers.
The Rhythm Box Music player produces sound out of the built-in speakers
as expected. Connection of a set of Bluetooth Headphones results in them
being listed in the Play sound through list. The Test Sound button works
through these headphones as does the output of the Rhythm Box Music
Player.
If a pair of wired headphones are plugged into the headphone socket,
they are not deteted and the Test Sound button sends its test signal via
the internal speakers. However, if the Bluetooth headphones are selected
in the Play sound through list, the Test Sound button tests are directed
through the Bluetooth headphones as one might expect.
I am inclined to think that the original HDMI output was a red herring.
I have, in the past, got sound to play through the speakers built-in to
an HDMI monitor by connecting the monitor through the video output using
an HDMI adapter. It seems that the sound output system is not very good
at detecting which output devices are connected at any one time. This
might be due to shortcomings in the kernel or for other reasons. Who
knows?
One thing that I can be sure of is that, after restarting the laptop,
the sound system might well be in a new state and not necessarily in the
one that it was in before restarting. There does not appear to be any
consistent behaviour as yet.
--
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https://bugs.launchpad.net/bugs/1402194
Title:
PCI/internal sound card not detected
Status in alsa-driver package in Ubuntu:
Incomplete
Bug description:
This bug relates to the internal sound hardware in a Dell XPS 13
laptop. Since accepting an upgrade to the latest Ubuntu Extra software
today, the Systems Settings > Sound > Output no longer show the
internal speakers, despite numerous attempts to shut down and restart.
Before accepting the upgrade, the sound played normally through the
speakers.
Having upgraded the system from the Ubuntu 12.10 originally installed
with the laptop and finding comments relating to the software drivers
for the Intel WiFi and Bluetooth chip (Intel AC 7520) and touch
screen, I tried out an installation straight from a Ubuntu 14.04
bootable USB stick. The system worked well enough without these
drivers so I went ahead and replaced the whole installation from the
USB stick and subsequently accepted the upgrade to 14.10.
I tried plugging in a headset and this produced a screen allowing me
to select the type of headset (mono, with or without mic or stereo).
An extra entry appeared in the System Settings > Sound > Output pane
allowing me to choose between the headset or the speakers and to test
the audio on each one. However, unplugging the headset seemed to
produce intermittent behaviour, the system being uncertain as to
whether the headset was in use. This was solved by re-booting and the
system and speakers behaved as expected.
Now I have the situation that the speakers are not shown in the Sound
> Output pane and the Output Volume slider stays at zero and is unable
to be moved with the pointer. The volume control slider in the
dropdown panel from the speaker symbol in the system tray appears to
respond to movement from the pointer and the Fn-F11 & F12 keys.
However, with no output device shown, there is no sound output to the
speakers.
Several attempts to restart the system have failed to restore the
speaker functionality.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
Uname: Linux 3.16.0-28-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: david 2172 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Dec 13 13:28:32 2014
InstallationDate: Installed on 2014-12-11 (1 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Title: PCI/internal sound card not detected
UpgradeStatus: Upgraded to utopic on 2014-12-11 (1 days ago)
dmi.bios.date: 09/11/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0D13CR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA05:bd09/11/2014:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0D13CR:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: XPS13 9333
dmi.sys.vendor: Dell Inc.
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References