I just reproduced it and it is easy to reproduce, and I think this is a new design on purpose in the gnome.
If there is no other audio apps (sink-inputs in the pulseaudio) than "System Sounds" (#7), the adjustment volume slider will produce sound to indicate the current output volume. If there are other audio apps (#8), they will replace the "System Sounds" when adjusting the volume slider. e.g. I run 'speaker-test -t wav -c 2' in a terminal, this audio app will replace the "System Sounds" when adjusting the volume slider, and the volume change is indicated by speaker-test instead of "System Sounds"; After I close the speaker-test, then the sound will come back to "System sounds" when adjusting the volume slider. So If you close those two audio apps with the name of "speech- dispatcher-xxxx", the sound will be back to "System sounds". So I think we should close this bug as invaliad? -- 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/1875445 Title: Volume slider doesn't produce sound Status in linux package in Ubuntu: Incomplete Bug description: Hello, In Ubuntu 20.04: After system boot there is sound and when I adjust volume with the slide (top right corner of the screen) it produces default sound. About 10 minutes (may be related to loading of certain s/w) later during the same session the slider stops producing sound when I adjust volume. System sound is still present. I also noticed that in Settings->Sound two more entries appear in "Volume levels": 1. Speech-dispatcher-dummy; 2. Speech-dispatcher-espeak-ng. These two entries are not present there right after system boot when everything works fine. I also see these errors in Logs: "sof-audio-pci 0000:00:1f.3: error: no reply expected, received 0x0". This bug is reproducible. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-24 (2 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) NonfreeKernelModules: nvidia_modeset nvidia Package: gnome-settings-daemon 3.36.0-1ubuntu2 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Tags: focal Uname: Linux 5.4.0-26-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875445/+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
