Could you see if it's possible to run "sudo fuser -v /dev/snd/*" right after startup, or maybe switch to a VT and execute it there? With some luck we might catch the offending application.
Could you see if it's possible to run "sudo fuser -v /dev/snd/*" right after startup, or maybe switch to a VT and execute it there? With some luck we might catch the offending application.