OS: Ubuntu 18.04.2 DE: Gnome Shell 3.28.2 Kernel: 4.18.0-25-generic Nvidia driver: 430.26 Audio: Headphones (Motherboard) + Speakers (HDMI)
Found an workaround (https://askubuntu.com/questions/1053076/18-04-sound-through-hdmi) and it worked for me: "When signal is lost to HDMI (during sleep) Pulse Audio is automatically configured to active source (your laptop's speakers). Upon resume the sound device is still your laptop. To override this setting, tell Pulse Audio to never switch sound devices automatically: edit the file /etc/pulse/default.pa find the line load-module module-switch-on-port-available insert a # at the beginning of the line to disable automatic port switching save the file and reboot." Steps to test workaround: 1) Change sound output to HDMI; 2) Open a browser (in my case Chromium snap) and wait for it to open; 3) Open media player (in my case VLC snap) and wait for it to open; 4) Play random video or music in both; 5) Pause playback; 6) Put Computer to sleep and wait like 30 sec; 7) Wake up from sleep; 8) Resume what was playing before going into sleep; 9) First time it could change output to Headphones, but at least I could switch to HDMI at least in settings; 10) Repeat step .6 through .9 a couple of times; The sound through HDMI should be working, could be switched and remains the default even after waking up from suspend, except first time. -- 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/1718927 Title: No HDMI sound after suspend/resume Status in pulseaudio package in Ubuntu: Confirmed Bug description: When plugging in a HDMI TV to Lenovo Carbon 3rd Edition, sound works perfectly, but when I suspend computer and resume it there is no sound via HDMI in TV. However sound via built in speakers works fine. The only thing I can do to restore sound is to reboot the machine. Similar problem was discussed in following thread https://ubuntuforums.org/showthread.php?t=2251651 with no solution. I tested it on several versions of kernel 4.4.0 and on 4.4.8. Still no solution. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1718927/+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
