No sound in lenovo yoga 2 except when coected to HDMI

I recently got a Lenovo Yoga 2 with windows 8 (now upgraded to windows 10), and apparently sound doesn't work; not through speakers, not through headphones, but only through HDMI.

I have looked all over the inteet, tried all kinds of fixes, uninstalled, reinstalled, and updated drivers, tried other drivers, and device manager says that everything works fine. I want to try use Ubuntu to see if that'll work, but never used ubuntu on a tablet nor ever tried installing it on a tablet, so I am unsure in that area.

Anything you guys might help me with? Thank you in advance.