Yes, I followed all the instructions. But, I am wondering if ubuntu-mate (current version) which is made to for armv7 (32 bit), and I have a pi 3 b+ (64 bit), could that be the problem?
I’m running 16.04.2 on both RPi2 and RPi3, so that isn’t the problem.
Further, I can use the same SD card install on either system - but have to sort out which interface I use of wifi or ethernet.
Derek
The new raspberry pi 3 model B+ requires new firmware to boot (since it uses new hardware) which is only available (as far as I can tell) with Raspbian Stretch. It may be possible to install the packages manually but I haven’t been able to find a list of the requirements. Let me us know if you find a work around!