I've written your Slackware image to a microSD card and booted it in my Orange Pi Plus. The Linux "3.4.39-01-lobo" kernel does not seem to have a driver for the wireless card (iwconfig reports: “no wireless extensions” for all the network interfaces). I can enable the wired NIC eth0 (using: "ifconfig eth0 192.168.1.123 netmask 255.255.255.0 up") but it's not active and doesn't recognise the fact that there's an Ethernet cable plugged into it. None of the LEDs illuminate on the Ethernet port. SSH and NTP services may be running but without a connection to the outside world there's not much point. I haven't searched for any drivers online or tried to install them. I assumed (perhaps wrongly) that they would have already been installed. Please advise accordingly.
Xfce is a great choice of desktop. I'll install it as soon as I can get the networking up and running.
I've written your Slackware image to a microSD card and booted it in my Orange Pi Plus. The ...
Have you copied the right uImage and script.bin for OPI-PLUS?
Ethernet works and it is detected and configured on boot.
For wifi you must load the module (8189es) and configure it yourself.