Default [Q] No lock screen after 4.3 update

Hi to everyone.

I flashed my N7100 with stock 4.3 ROM. I did flash via Odin 3.09. Phone was not rooted or modified before update.

After update (which went OK), I noticed there are 2 problems:
1. No lock screen possibility (all options are present in Setting menu), but phone will not lock
2. Power button only works like: short press -> screen off, long press power off. There is no menu after long press to offer ****down, restart, airplane mode.....

Does anybody know is there a way to fix this???