Arch linux: set keyboard layout to PL

I'm unsuccessfully trying to force my Arch to set pl layout on X start.

I've googled for solutions, and I found couple of tutorials/tips but none of them works.

My current, keyboard related settings:

LANG=pl_PL.UTF-8 in /etc/locale.conf
pl_PL.UTF-8 UTF-8 in /etc/locale.gen

I did: localectl set-x11-keymap pl to generate conf for X,

I have created /etc/rc.conf with:

#
# /etc/rc.conf - Main Configuration for Arch Linux
#
# See man 5 rc.conf for more details
#

# LOCALIZATION
# ------------
HARDWARECLOCK="UTC"
TIMEZONE="Europe/Warsaw"
KEYMAP="pl"
CONSOLEFONT="lat2-16"
CONSOLEMAP="8859-2"
LOCALE="pl_PL.UTF-8"
DAEMON_LOCALE="yes"
USECOLOR="yes"

with no success.

EDIT:

Context of important files:

/etc/vconsole.conf:

KEYMAP=pl
FONT=lat2-16
FONT_MAP=8859-2

/etc/X11/xorg.conf.d/00-keyboard.conf:

# Read and parsed by systemd-localed. It's probably wise not to edit this file
# manually too freely.
Section "InputClass"
        Identifier "system-keyboard"
        MatchIsKeyboard "on"
        Option "XkbLayout" "pl"
EndSection