No sound from internal speakers

I have a System76 Lemur Ultra Thin (lemu4) notebook PC and OpenSuSE 64 bit Tumbleweed. I recently switched from the KDE SC 4.9 Core and Extras repository to the Tumbleweed repository and I get no sound output from my internal speakers. I can’t hear anything from my speakers. I tried configured various settings, but nothing works. I can listen to audio if I plug in my Grado SR-60i or Sennheiser HD-650 headphones into the internal headphone jack, but that’s it.

What information do you need from me?

How do I provide you with that information?

How do I solve this problem?

I have not rebooted my PC yet. I am thinking about doing that, but I don’t know if it will solve my problem.

Please help me solve this problem. Thank you.

I rebooted my PC and I got sound working properly again on my internal speakers and my headphones. This is solved. Thank you.