Okay. Enabling audio at run time is indeed not the underlying cause of the hang. The offending commit is: 0ffae60c8976fb407de04cebd8c4cfae932bc671 Setting audio via xrandr works as expected after reverting: 58d327da9721f7a0f6e46c8dfa5cc5546fd7078a c1cbee0ec0697c531778fbaf34aa358c0f5ef00e 0ffae60c8976fb407de04cebd8c4cfae932bc671