After upgrading from Kubuntu 19.04 to Kubuntu 19.10 I've started having issues with only having a Dummy Output sometimes when resuming my PC from standby. I've noticed that this issue seems to occur somewhat randomly after some resumes but doesn't happen during others. Running pulseaudio -k always fixes the issue and it never occurs on a power-up or reboot.

Running journalctl --since "1 day ago" | grep pulseaudio after resuming my PC from standby gives the following output:

Nov 10 21:30:44 Linux-PC pulseaudio[3005]: W: [alsa-sink-ALC1150 Analog] alsa-util.c: Could not recover alsa device from SUSPENDED state, trying to restart PCM Nov 10 21:30:44 Linux-PC pulseaudio[3005]: W: [alsa-source-ALC1150 Analog] alsa-util.c: Could not recover alsa device from SUSPENDED state, trying to restart PCM Nov 10 21:30:44 Linux-PC pulseaudio[3005]: E: [alsa-source-ALC1150 Analog] alsa-source.c: Error opening PCM device front:0: No such file or directory Nov 10 21:30:44 Linux-PC pulseaudio[3005]: E: [alsa-sink-ALC1150 Analog] alsa-sink.c: Error opening PCM device front:0: No such file or directory

I do have a modification in my default.pa config:

load-module module-echo-cancel source_name=noechosource sink_name=noechosink set-default-source noechosource set-default-sink noechosink

but I found the issue persisted even when the modification was disabled.

The controller that I use is the following:

00:1f.3 Audio device: Intel Corporation 100 Series/C230 Series Chipset Family HD Audio Controller (rev 31)

and I am using kernel 5.3.0-18-generic.

Any help would be appreciated. Thanks.

UPDATE: After discussing this issue with one of the pulseaudio devs it was found that the nvidia proprietary driver I have installed was causing this. The issue would disappear when I removed it and would come back when I reinstalled it.