Public bug reported:
When returning from a previous Log Out, the previously connected Wi-Fi
fails to reconnect.
In contrast, when rebooting or performing a restart, the system connects
to the previously connected Wi-Fi.
Although the Enable Wi-Fi drop-down menu item is ticked, the connect
button
I have found this bug on several computers running Ubuntu 16.04 and
Raspberry Pi 2s and a 3 running Ubuntu MATE 16.04. With a quad core CPU,
gvsfd-smb-browse seems to consume 100% of one of the cores.
On a Dell XPS13 laptop, this causes the cooling fan to come on. On the
Raspberry Pi 2 and 3, it
Despite the crackling on the Speaker Test, I have managed to get YouTube
videos to play with un-distorted sound using Firefox.
Obviously, Firefox's input to the sound system appears to work as
expected.
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Public bug reported:
When restarting from scratch, the previous WiFi enabled state is
remembered and restored. However, when logging back in after a Log Out,
the WiFi is sometimes (but not always) disabled.
This might have been reported under Ubuntu 15.04 and certainly occurred
under 15.10.
This bug is also reported via the UbuntuMATE community:
https://ubuntu-mate.community/t/problems-with-sound-on-rpi-2-3-under-
ubuntu-mate/5087
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Having upgraded the Raspberry Pi (2 & 3) to Ubuntu MATE 16.04 Beta 2,
the bug is still present and can be demonstrated adequately by
attempting the built-in Speaker Test.
Interestingly, the Raspberry Pi s are capable of attempting to run the
Software Defined Radio app Gqrx. This app has
The bug also exists on Ubuntu MATE 15.10 running on the Raspberry Pi 2.
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https://bugs.launchpad.net/bugs/1563112
Title:
[bcm2835 - bcm2835 ALSA, playback]
Just in case it is not obvious from the data collected, this relates to
the version of Ubuntu MATE 15.10 running on a Raspberry Pi 3
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Public bug reported:
This bug can be reproduced by using the Speaker Testing for bcm2835 ALSA
window from the Sound Preferences > Hardware > Test Speakers button.
Clicking the Front Left or the Front Right Test buttons causes the bug
to be demonstrated.
The bug prevents apps that produce sound
** Changed in: alsa-driver (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1408110
Title:
[XPS13 9333, Realtek ALC3661, Speaker,
Despite no activity on this bug, the fault is still there.
If Musescore is started first, the sound is distorted. If the Sound
panel (under Systems Settings) is opened when Musescore is playing
distorted sound and the test buttons activated, then the tests are also
distorted.
If Musescore is
Public bug reported:
The distorted sound only occurs when using MuseScore 2.0.2 to play music
through the speakers. The sound initially appears distorted and crackly.
Using the Sound app to test the speakers, the normal test signal is
distorted and crackly, even though the tests sound normal
During July and August, with higher ambient temperatures, it was
observed that the built-in sound system was not recognised at all.
Suspecting that the bug was a temperature-related hardware problem, I
discussed the matter with Dell technical support. Rather than send the
laptop back under its
*** This bug is a duplicate of bug 1408302 ***
https://bugs.launchpad.net/bugs/1408302
This bug was found to be the result of a hardware fault. Please see
comment to bug #1408302.
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After experiencing warmer weather and hence a warmer start-up
temperature for my laptop, I discovered that the sound system would not
work at all and would not respond to a re-boot. In order to prepare the
laptop for a possible return under the guarantee, I re-installed Ubuntu
14.04.02 LTS and
I do not seem to find a way to close this bug report. The problem is
fixed but does not need (IMHO) any software intervention.
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https://bugs.launchpad.net/bugs/1408110
** Changed in: alsa-driver (Ubuntu)
Status: Incomplete = New
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https://bugs.launchpad.net/bugs/1450207
Title:
[XPS13 9333, Intel Haswell HDMI, Digital Out,
** Changed in: alsa-driver (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/1408110
Title:
[XPS13 9333, Realtek ALC3661, Speaker, Internal]
Public bug reported:
When starting Ubuntu from boot-up, sometimes the F11 and F12 keys have
no effect on the sound volume, even though it can be controlled by the
slider in the Sound window.
This can often be restored by re-booting the OS.
When the F11 and F12 keys are working as expected, a
Since upgrading to 15.04, I still experience inconsistent behaviour in
the sound system. Sometimes, the system does not detect the speakers at
all on boot-up. At other times, the Sound panel shows the HDMI sound in
the Settings for Speakers section (although this can be corrected by
clicking on
After a reboot, plugging a headphone extension lead (open circuit) into
the headphone socket brings up Headphones in the Sound - Output tab and
both Headset Microphone and Microphone in the Input tab. Removing the
lead removes the extra microphone from the Input tab and the Headphones
from the
Now that the sound system is going through one of its funny moods,
plugging in a mono microphone brings up Headphones on the Play Sound
Through box although the Speakers can still be selected as Output.
Selecting the Input tab of the Sound panel, the Microphone shows up as
an input device (as
I have noticed, when running processor-intensive apps such as Handbrake
or FlightGear, that the inbuilt speakers become crackly but can often be
restored by repeatedly activating the Test Sound Button.
Might I suggest that this is caused by a conflict of interrupts?
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When pluggin in a microphone, the Unknown Audio Device window pops up
and the microphone can be selected. The Microphone - built-in Audio menu
items appears in the System Settings Sound Input window as expected
and any sound picked up by the microphone shows up as a moving segment
in the Input
Public bug reported:
When the system starts up, the sound system sometimes fails to recognise
the sound hardware correctly.
One instance is where the System Settings Sound window shows the
Speakers, Built-in Audio in the Play Sound Through window but shows the
settings for HDMI / Display Port
Public bug reported:
This is not necessarily a bug but a request for a minor enhancement.
On a laptop (eg Dell XPS 13), there are a number of functions programmed
into the funtion keys. These include keyboard brightness, screen
brightness, sound volume, playout start/pause etc. These currently
Public bug reported:
This is related to a previously reported bug but, since downloading
updates, the bug has taken on a new set of behaviours.
Initially, Ubuntu needs to be restarted several times before the built-
in audio is recognised.
To eliminate the possibility of a hardware fault, the
A further observation:
When a bluetooth headset is switched on and connected via the drop-down
menu in the bluetooth icon, the mode sometimes appears as the Digital
Stereo (HDMI) options. Using the Volume Control - Configuration tab to
choose Off for the Built-in Audio allows the bluetooth
Even when the system concedes to detect the Built-in Speakers, a Mode
window appears offering a choice of Stereo or Dolby 5.1 that belongs to
the HDMI output via the Display Port. It is necessary to plug in a set
of headphones in order to select between the Speakers or the Headphones
and update
Public bug reported:
When starting from cold, the built-in audio system (Speakers) do not
always appear in the Sound panel. After a restart, if the Speakers do
appear, the Settings for Speakers will list the HDMI option instead of
the Test Sound button. A workaround is to plug in a set of
A further observation:
When doing a cold startup with the headphones plugged in, the Sound
panel only showed the Speakers. Operating the Test Sound button produced
the Left and Right channel sounds in the headphones. When disconnecting
the headphones and re-inserting their plug, the Headphones
Public bug reported:
When playing a video via the Videos app, the sound through the internal
speakers develops crackles and sometimes disappears completely.
I collected the data for the bug report at the instance that the sound
had failed.
Using the Sound panel in Systems Settings to test the
Public bug reported:
When I first connected the Waycom Tablet, the on-screen pointer moved as
expected with the stylus movement. However, after unplugging the USB
lead and re-inserting it, I have not been able to reproduce this
movement.
The tablet is fully functional and works perfectly when
apport information
** Tags added: apport-collected
** Description changed:
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
apport information
** Attachment added: CurrentDmesg.txt
https://bugs.launchpad.net/bugs/1402194/+attachment/4284640/+files/CurrentDmesg.txt
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apport information
** Attachment added: ProcEnviron.txt
https://bugs.launchpad.net/bugs/1402194/+attachment/4284641/+files/ProcEnviron.txt
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apport information
** Attachment added: BootDmesg.txt
https://bugs.launchpad.net/bugs/1402194/+attachment/4284639/+files/BootDmesg.txt
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apport information
** Attachment added: PulseList.txt
https://bugs.launchpad.net/bugs/1402194/+attachment/4284642/+files/PulseList.txt
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This is a further report on the behaviour of the sound system.
I did not experence any crackling today so am unable to report on its
occurrence.
I played a video using the Videos app and ontained good quality sound.
Plugging a pair of good quality headphones allowed me to listen for any
Having downloaded and installed todays latest kernel update v3.18.1, I
now find that the HDMI / Display Port menu items appears in the Sound
pane when the HDMI monitor is plugged into the Display Port. This was
after a cold start.
Since this was the start of this bud report and now appears to be
Sorry, still not fixed.
When plugging in a Sony TV set with HDMI, it is not recognised without
using VLC to kick start the recognition. Once recognised, removing the
Display Port plug and re-inserting it sometimes removes the HDMI menu
item and has it re-appear but not predictably so. Sometimes
I am attempting to eliminate possible poor electrical connections
associated with the headphone socket by starting up the laptop from cold
(literally having cooled down) and running a video to check the sound
quality.
Last evening, within 10 minutes of starting the laptop from cold, the
sound
Please note that with the headphones plugged it and the Speakers re-
selected, the Test Sound button brings up the panel labelled Speaker
Testing for Speakers. The test buttons produce sound in the headphones
and not the speakers. The plugging in of headphones therefore overrides
any output
Regrettably, my suggestion that this bug report be closed is premature.
On switching on the laptop from cold this morning, I found that there
was nothing listed in the Systems Settings Sound pane.
I chose to shut down and start up again. This time, I found the
Speakers, Built-in Audio listed
Here we go again!
Whislt playing a video through Videos with the sound playing over the
speakers, I turned on a pair of Bluetooth hadphones. Sure enough, the
headphones' menu item appeared in the Systems Settings Souund pane. I
needed to hightlight the item to get the sound through the
Public bug reported:
If an HDMI monitor is plugged into the video out and the Videos app is
started, the Systems Settings Sound Output shows only the Speakers,
Built-in Audio in the Play sound through listing. The HDMI option is not
presented.
The workaround is to open the VLC app which lists
Note:
If, when playing a video through Videos, the monitor is unplugged, the
HDMI option disappears from the Play sound through listing.
When another HDMI device (such as a TV set with HDMI inputs) is plugged
into the Display Port, the HDMI option reappears in the Play sound
through listing.
When the output is directed to an external HDMI monitor and the lead
into the Display Port is unplugged, the HDMI option disappears from the
Sound Output menu leaving just the Speakers highlighted. However,
there is no sound from the Speakers until the highlighted menu item is
clicked with the
Just another observation:
I stopped the video playout through the TV set and unplugged the Display
Port.
I then did a Shut Down followed by a cold start. Having opened the System
Settings Sound pane, I plugged in the Display Port connector and,
miraculously, the HDMI option appeared in the
I can confirm that unplugging the Display Port when directing sound
through Digital Stereo (HDMI) does cause the Digital Stereo option to be
removed from the listing leaving the Speakers highlighted. The sound is
muted and the Speakers have to clicked to get the sound to play through
them. It
Having done a few cold starts since I discovered the original bug, I
find that I am unable to reproduce the initial failure to connect as the
Sound pane lists the Digital Stereo (HDMI) option as soon as an HDMI
monitor is plugged into the Display Port. This allows the output to be
tested using the
A further observation today:
Turning the laptop on from cold, the speakers appeared in the Sound pane
as expected. When testing the Videos app, the sound played normally at
first but a few crackles were heard. This seemed to have coincided with
setting the display to Full Screen. The sound from
Just another observation: switching back and forth between Speakers and
Headphones sometimes puts the headphones into the Telephony Duplex mode.
Even though the High Fidelity Playback seems to be selectable, the Test
Sound button only results in the Mono test being offered. A workaround
is to turn
Another observation to add to the above.
I switched on the laptop from cold. It seemed to boot up correctly and
the Speakers (Built-in Audio) were showing in the Play sound through
panel of System Settings Sound Input. I started to play a video
through the Videos app and noticed a slight
Public bug reported:
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
Just to add even more complication to the issue:
Having restarted the system yet again, I find that the Sound Output
pane is now showing the Speakers, Built-in Audio under the Play sound
through list. The Test Sound button now works as expected and the Fn-F11
F12 keys control the Output Volume
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
Public bug reported:
This bug report refers to a Dell XPS13-9333 running Ubuntu 14.10.
The System Settings Mouse Touchpad windows provides the option to
disable the touchpad whilst typing. Unfortunately, this does not seem to
disable the sensitivity of the touchscreen such that inadvertent
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