After DP connected monitor wakes up after sleep, sound does not work through the HDMI/DP output. If I open PAVUCONTROL, I can see that the output no longer exists as an output device, and within the sound within settings, you can select the output, but it does not work. If I reset pipewire, using systemctl --user restart pipewire the output will work again. Reproducible: Always Steps to Reproduce: 1.Wait for monitor to sleep after inactivity 2.wake monitor and log on 3. Expected Results: When waking from sleep, sound via DP/HDMI should work. I have been running Fedora 40 since release, on this setup and this issue only came about in the last few weeks.
I have about the same problem but with PC going to sleep and after it no sound. Restarting pipewire fixes the issue. Bug: https://bugzilla.redhat.com/show_bug.cgi?id=2298658
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