I had the problem, that suddenly audio wasn't working anymore. Pressing any volume button or the mute switch resulted in nothing (no notification).
I tried restarting pulseaudio and got the following log:
Did couple of restarts, battery eject, started with headphones connected. Nothing
user.err pulseaudio: module.c: Failed to load module "module-alsa-sink" (argument: "device=hw:0 sink_name=pcm_output mmap=1 tsched=0 channels=2"): initialization failed.
user.err pulseaudio: main.c: Module load failed.
user.err pulseaudio: main.c: Failed to initialize daemon.
daemon.warning upstart: (00023/620262560) pulseaudio main process (1424) terminated with status 1
daemon.warning upstart: (00023/620476183) pulseaudio main process ended, respawning
user.warning pulseaudio: alsa-util.c: Unable to convert error string to locale, filtering.
Hardware test of volume and mute buttons worked.
After uninstalling Uberkernel sound works now.
EDIT: I have only one patch installed: "Unthrottle Download Manager"
EDIT2: Uberkernel version v188.8.131.52