I did a test today, plug two monitors to Intel hdmi ports, I chose hdmi2 in the gnome-control-center, suspend and resume, the output device still on the hdmi2, I didn't reproduce the problem.
When you have time, please collect the log according to https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1888598/comments/12 and https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1888598/comments/32 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1895665 Title: PulseAudio automatically switches from HDMI 2 after display sleep Status in pulseaudio package in Ubuntu: New Bug description: I have an Nvidia based video card that has an HDMI output + a DisplayPort output. DisplayPort output audio is listed as "Digital Stereo (HDMI)" and HDMI output is listed as "Digital Stereo (HDMI 2)". I prefer to use "Digital Stereo (HDMI 2)". But after each display sleep (screen lock for example) audio is switched to built in audio ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: pulseaudio 1:13.99.1-1ubuntu3.6 ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55 Uname: Linux 5.4.0-47-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.8 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: XFCE Date: Tue Sep 15 14:56:58 2020 InstallationDate: Installed on 2020-06-20 (86 days ago) InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/11/2019 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.11.1 dmi.board.name: 0CNDTP dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.11.1:bd11/11/2019:svnDellInc.:pnG55590:pvr:rvnDellInc.:rn0CNDTP:rvrA01:cvnDellInc.:ct10:cvr: dmi.product.family: GSeries dmi.product.name: G5 5590 dmi.product.sku: 08EA dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1895665/+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
