Comment 5 for bug 1894881

I think I found out what's happening.

When the machine boots, and the login screen is displayed
The sound is not immediatly initialized and working
If, when it's not yet ready, I press the cut volume/volume up/volume down
It puts the sound card and/or Pulse into a state where it gets stuck...

If I wait a little after login, say 5 seconds or so
The sound card finishes its initializatino thing (or Pulse, no idea)
And then I have no problem with sound

Not sure this is really a bug...