Q: After upgrade I have no sound from speaker except ringtones. Headphones work fine.

Hello Aztam1,

Welcome to the Apple Support Communities!

I understand that you are getting no sound from your iPad’s speaker other than ringtones. If you are hearing these ringtones through the Settings > Sounds menu, this may indicate that the iPad may be set to silent. Please use the first attached article to check and  make sure your iPad has not been set to mute sounds. 

About the iPad Side Switch - Apple Support

If the sound is not muted, please refer to the next attached article to continue the troubleshooting process. 

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

Have a great day,

Joe