sudo output printed in wrong tty

[V5r29JrRjC576nAY5jQi]

Hello, I have numerous problems with tty:
urxvt: could not obtain control of tty
And now I encountered another problem: sudo output goes wrong tty.
For example I log in tty1 as root, and tty2 as user, when I invoke sudo su from user, it prints messages on tty1 where I loged in as root.

[bunder]

this usually happens if you aren't running a logger of some sort. https://wiki.gentoo.org/wiki/Handbook:AMD64/Installation/Tools#System_logger

cheers
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