Update with some new info. I booted into Win10 and noticed that it wasn't recognizing an audio device. Googled around a bit and ended up (re)installing the Realtek drivers largely by following what I read here:
http://en.community.dell.com/support-forums/laptop/f/3517/t/19630850 NOTE: I did the diagnostic and the 8 tones played correctly from the speakers. Rebooted into Win10 again. It was showing an audio device, but I couldn't get it to actually play anything. Rebooted into Ubuntu again, and it now sees the broadwell-rt286 device! With a little poking in sound preferences, I'm able to get the laptop speakers to work. Not quite out of the woods yet though. 1) If I reboot the computer into Ubuntu, the broadwell device disappears. I have to go into Win10 and then back into Ubuntu to get it to show up again. 2) If I plug speakers into the headphone jack, I can get sound to work, but if the sound card is left alone for any length of time is starts making a loud persistent clicking sound over and over. The speakers will play any audio just fine, but if I'm not doing anything, there's a continuous clicking noise. I'm attaching the output of a new run of also-info.sh, which definitely has a bunch of new things in it compared to the attachment in my previous comment. ** Attachment added: "alsa-info-new.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1551880/+attachment/4660983/+files/alsa-info-new.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1551880 Title: [Dell XPS 13 9343] Audio broken with I2S mode in Ubuntu 16.04 kernel 4.4 (but works with kernel 4.3) Status in linux package in Ubuntu: Confirmed Bug description: I wanted to try Linux again on this machine and the tons of troubleshooting since release got a bit better, but the sound is still a bit strange. So after changing distributions I installed Xubuntu 16.04 Beta 1 today with kernel 4.4.0-8 and sound isn't working because the 3,5 mm device is completely missing. PulseAudio is only showing the HDMI output. I got the sound working by downloading kernel 4.3.6 from the Ubuntu kernel archives, although then it looks like it is running in HDA mode instead of I2S (which I don't like because Dual Boot). Let me know if there is anything else I can do to track down the problem. $ dmesg -t | egrep "(audio|snd|INT3438)" DMAR: ACPI device "INT3438:00" under DMAR at fed91000 as 00:13.0 snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002) sst-acpi INT3438:00: DesignWare DMA Controller, 8 channels haswell-pcm-audio haswell-pcm-audio: Direct firmware load for intel/IntcPP01.bin failed with error -2 haswell-pcm-audio haswell-pcm-audio: fw image intel/IntcPP01.bin not available(-2) haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version: 00.00, build 77, source commit id: 876ac6906f31a43b6772b23c7c983ce9dcb18a19 broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915]) broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered broadwell-audio broadwell-audio: ASoC: CODEC DAI rt286-aif1 not registered $ cat /proc/asound/cards 0 [HDMI ]: HDA-Intel - HDA Intel HDMI HDA Intel HDMI at 0xf7218000 irq 50 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-8-generic 4.4.0-8.23 ProcVersionSignature: Ubuntu 4.4.0-8.23-generic 4.4.2 Uname: Linux 4.4.0-8-generic x86_64 ApportVersion: 2.20-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sysop 1266 F.... pulseaudio CurrentDesktop: XFCE Date: Tue Mar 1 18:48:05 2016 HibernationDevice: RESUME=UUID=338a51e1-7748-466e-ba21-4210b34c4189 InstallationDate: Installed on 2016-03-01 (0 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224) MachineType: Dell Inc. XPS 13 9343 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-8-generic.efi.signed root=UUID=347e6152-7230-486c-b801-8eb0811c8c8d ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-8-generic N/A linux-backports-modules-4.4.0-8-generic N/A linux-firmware 1.156 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/11/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: 0WF2C3 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA07:bd11/11/2015:svnDellInc.:pnXPS139343:pvr:rvnDellInc.:rn0WF2C3:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9343 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1551880/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
