Comment # 27 on bug 1163771 from Clemens Famulla-Conrad

I'm not sure what cause your problem. I also tried wicked+wlan on a just
updated tumbleweed and didn't got any problems with WPA_PSK config like:

> BOOTPROTO='dhcp'
> STARTMODE='auto'
> WIRELESS_MODE='Managed'
> WIRELESS_AUTH_MODE='psk'
> WIRELESS_ESSID='XYZ'
> WIRELESS_WPA_PSK='SECRET'


You may also get some wpa_supplicant debugging possibility by enabling the
control interface and use `wpa_cli` to play around:

> sed -i '/^ExecStart=/c\ExecStart=/usr/sbin/wpa_supplicant -c /etc/wpa_supplicant/wpa_supplicant.conf -u -t -f /var/log/wpa_supplicant.log -O /var/run/wpa_supplicant' /usr/lib/systemd/system/wpa_supplicant.service
> systemctl daemon-reload
> systemctl restart wpa_supplicant.service
> rcwickedd restart
>  
> wpa_cli
>  > log_level debug
>  > list_networks
>  > password X Y
>  > status
>  > disconnect
>  > reconnect