I have the same problem that is initially solved in the same way. Closing the laptop and opening it again seems to restore sound. Running Ubuntu Studio v19.10 amd64 on a brand new, just bought HP Pavilion x360-14-dh1008ca. Any way I can help with full solution, let me know.
-- 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/1841330 Title: [HP Pavilion x360 Convertible 14-ba1xx, Realtek ALC295, Speaker, Internal] No sound at all Status in alsa-driver package in Ubuntu: New Bug description: I have installed Ubuntu 19.04 and the laptop does not play any sound through the internal speakers. When I plug in the headphone I am able to listen sound though. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.0.0-25.26-generic 5.0.18 Uname: Linux 5.0.0-25-generic x86_64 ApportVersion: 2.20.10-0ubuntu27.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: anoopjohn 1718 F.... pulseaudio /dev/snd/pcmC0D0p: anoopjohn 1718 F...m pulseaudio CurrentDesktop: ubuntu:GNOME Date: Sat Aug 24 17:17:01 2019 InstallationDate: Installed on 2019-08-23 (1 days ago) InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416) PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash 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: anoopjohn 1718 F.... pulseaudio Symptom_Jack: Speaker, Internal Symptom_Type: No sound at all Title: [HP Pavilion x360 Convertible 14-ba1xx, Realtek ALC295, Speaker, Internal] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/12/2018 dmi.bios.vendor: Insyde dmi.bios.version: F.52 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 83C4 dmi.board.vendor: HP dmi.board.version: 31.61 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnInsyde:bvrF.52:bd11/12/2018:svnHP:pnHPPavilionx360Convertible14-ba1xx:pvrType1ProductConfigId:rvnHP:rn83C4:rvr31.61:cvnHP:ct31:cvrChassisVersion: dmi.product.family: 103C_5335KV HP Pavilion dmi.product.name: HP Pavilion x360 Convertible 14-ba1xx dmi.product.sku: 5GR61UA#ABA dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP mtime.conffile..etc.modprobe.d.alsa-base.conf: 2019-08-24T17:12:21.772103 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1841330/+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