I ran into this as well on a Dell Precision 5520. I tried all the fixes listed at https://help.ubuntu.com/community/SoundTroubleshootingProcedure and nothing worked. Only reverting to the 4.4.0-130-generic kernel partially fixed the problem, but sound still breaks when I suspend/resume.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1783689 Title: [HDA-Intel - HDA Intel PCH, playback] No sound at all Status in alsa-driver package in Ubuntu: Confirmed Bug description: Speakers work from windows partition. Hear sounds when ubuntu log in page comes up. Once logged in cannot hear sound using alsa or pulseaudio. No reports of speaker problems or app complaints ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134 Uname: Linux 4.4.0-131-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jon 1974 F.... pulseaudio CurrentDesktop: Unity Date: Wed Jul 25 22:26:23 2018 InstallationDate: Installed on 2018-01-05 (201 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed Symptom_Card: Built-in Audio - HDA Intel PCH Symptom_DevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jon 1974 F.... pulseaudio Symptom_Type: No sound at all Title: [HDA-Intel - HDA Intel PCH, playback] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/18/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.3 dmi.board.name: 05FFDN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.3:bd01/18/2017:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.name: XPS 15 9560 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1783689/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
