I do not get the message the you comment about but I have noticed wrong selected audio output after resuming from time to time after resuming.

Same here. Tried to fix it with a script which kills pulseaudio and restarts it. At first it seemed to work but i realised it was no improvement

Last night everything was working fine (other than the occasional reboot to restore sound). Today I opened the machine, saw the "what kind of device did you just plug in" prompt, and rebooted. Now I only have one item under Sound properties, "Dummy Output." Can't get sound back, no matter how many times I sleep/resume or reboot.

Alarmingly, the bios reads "None" for Audio Device. Not sure if this has always been so, but it leads me to think it's a hardware failure rather than a Ubuntu issue.

Can Barton or anyone else chime in with some tips? A machine with no sound is a machine that needs to be sent back.

Jefish,

You could be right about it being a motherboard problem. Let's open an official support case and figure it out. To proceed, please send me a friend request. Once I accept we can then private message each other and work it out.

Hi, I've received my XPS 13 with Ubuntu today and make an Update:

Linux xps13 3.19.0-58-generic #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

and I've got the same issues after resuming like JEFISH described in his first post.

Any help in sight?

Best regards,

@Community,

Thank you for your posts and feedback.

Due to your multiple reports on this concern we're now planning to try and replicate the issue in house. Should know more late next week.

Jefish has mentioned to me that on every 4th or 5th time he reboots to fix the audio issue, it won't help. Sound Settings will list 'Dummy Output', at that point. Jefish checked the BIOS and saw that the audio device is listed as 'None' instead of 'Realtec'.

Can you all check to see if you can produce the same behavior on the BIOS level?

Is everyone on the XPS 13 9350 latest BIOS ? ( just confirming the basics since Jefish saw behavior on the BIOS level )

As Justin said, when you find that your sound has been knocked out, warm boot into your BIOS and scroll to the bottom of the system summary. My audio device will always be set to None when the issue happens.

I have found that the problem does not repro after a cold boot. Resuming will knock out my sound, and a warm boot will generally only make things more confusing. But a full shutdown will bring things back to normal.

I'm sure Dell will make things right, but in the meantime I've been shutting down the machine completely after use. It's not ideal, but it seems to be an effective workaround for the time being.

Hello,

i'd updated the BIOS to the latest version (1.3.3) and the issue occurs also after the update.

In the BIOS I also saw always the sound device available.

Best regards

Hi,

I'm seeing the same error (BIOS 1.3.3, no sound, Dummy Output in sound settings) - never occurred before Ubuntu update to kernel 3.19.0-58-generic and plugging headphones in. Appeared after sleep, with same prompt for device selection, list of HDMI outputs and headphones selected as described earlier in this thread. Repeated (>7) restarts did nothing, audio device was present in BIOS but aplay -l reported no soundcard present.

Rebooting into Dell diagnostics showed that soundcard/speakers were functioning correctly and then after booting into linux the soundcard was found again I'm not sure if this was coincidence, a "fix" or something to do with reports that two cold reboots are required to push soundcard changes through. (Log in screen initially showed red speaker with cross next to it, but this is fixed after login). Aplay -l now lists ALC3246 Analog plus three HDMI devices as shown by someone else in: https://bbs.archlinux.org/viewtopic.php?id=211546  - and https://wiki.archlinux.org/index.php/Dell_XPS_15#Sound but no HDMI outputs (or headphones) show up in Sound Settings. 

Archwiki seems to think the issues aren't hardware-related though, which is a bit of a relief.

Hi,

Same issue here - no sound after sleep+prompt to select device, 'Dummy Output' on sound settings, no controller in BIOS(v 1.3.3). Sound works again only after shutdown.

This is a bug that's hard to live with, hopefully DELL will find a solution soon..