Its a sound issue, I wouldn't be able to provide an exact match as typed
- My sound works 25% of the time
- My sound works 50% of the time
- My sound works 0% of the time
--that is no sound at all
- My sound works only intermittently
--it cuts on and off
Q. What sound, where (speakers/headphones)
Q. Only with some applications or as a general OS problem, affects all or most applications
--etc etc..
Any sound issue, whatever the state of that sound issues has to be checked for sound issues
--that means looking at the settings for alsa and so on..