iPhone 4S on iOS 6 Doesn't Sync All Music?

[KWall24]

Okay, so I updated to iOS 6 on my 4S. Was trying to get my contacts to sync from the phone to google calendar, and during a sync, all my music vanished from my phone.

I went to resync it, and it seemed to be going fine. I have it set to "Sync only checked songs and videos" and was looking at iTunes, which said it had 10GB of music.

Exhibit A

"That must be wrong," I thought, as before I lost the music, I had around 16GB of music. iTunes refuses to sync this ~6GB, for no apparent reason. I hit sync and it doesn't send any music, or show an error message.

If I uncheck "Sync Music" but hit "Cancel" on the pop-up, the gauge shows that 16GB of music is going to be on the phone.

Exhibit B

Until I try to sync, which drops it back down to 10GB. I can't figure out a way to do this.

If anybody can help me, that would be great. If you need help understanding, let me know. It's kind of hard to write about it.

 

[Lauren5280]

I am having the same issues. I have tried several things to try to fix it without any success.

I hope someone finds a cure for this soon.

 

[nbeshouri]

This is happening to me too. About a 1/3 of my music usually doesn't sync. Every now and then, it will sync it all only to delete it the next time round. iPad syncs the same music no problem.

I was also seeing it with iOS 5 and had hoped that iOS 6 would fix it, but it made no difference.

Is there any known fix?