just doing an Internet search shows lint in the jack as the major problem. I have not come across any software upgrade issues not to say it can't happen.
Mine had also quit but I just found the setting to fix it back!! I'm super excited. I guess the software update changed this setting or added it??? Anyway, here you go!!
2. Sound and Notification
4. The last row is "System" Mine was set to silent. I drug it to the right......PRESTO!! It works again!!!