I have tried all the forum threads here concerning this problem, none of the provided solutions worked (some even made the problem worse). I have an Asus x551m Laptop with SonicMaster audio. Ubuntu 14.04 worked fine with both the Headphones and internal speaker. After updating to 14.04.1, my headphone jack stopped working but the internal speaker is working fine.
I got it fixed by doing following:
- open terminal and run
when you plugin your headphones, this should be the configuration:
master - 00, 64(need not be 64, can be any other value) headphones - 00, 100 speakers MM, 0
In my case, headphones was showing
MM instead of
00. It can be changed by moving to headphones and pressing m.
I found this tip for Ubuntu 13.10 and it worked for me after I upgraded to 14.04.1, maybe it works for you as well? :)
"Probably, your Headphone Jack Sense is turned off..
Open Terminal. Type in alsamixer. Locate and navigate to "Headphone". Press m. This should turn on your Headphone Jack Sense."