Hi Daniel
With the Raspbian OS image, I followed these steps
With the Ubuntu 16.04 OS image, I followed these steps:
List the installed bananapi packages
dpkg -l | grep bananapi
If you don’t see the bpi-tools package then download it from here and then install it as follows
The path shown below is wherever you downloaded the package to
For me, I downloaded the package to this path: /home/pi/Downloads/bananapi-bpi-tools_1.0.3_armhf.deb
sudo dpkg -i /home/pi/Downloads/bananapi-bpi-tools_1.0.3_armhf.deb
List the installed bananapi packages again, if the install was successful, you’ll now see the bpi-tools package
dpkg -l | grep bananapi
Check that you have the following file
/usr/lib/u-boot/bananapi/bpi-m3/BPI_M3_1080P.img.gz
To check, run the following command
ls -la /usr/lib/u-boot/bananapi/bpi-m3
Once confirmed that you have the file, then run the following command from the command shell to change resolution to 1080
sudo bpi-bootsel /usr/lib/u-boot/bananapi/bpi-m3/BPI_M3_1080P.img.gz
Once complete then run
sudo reboot now
You should now have 1080 resolution once the Pi boots back up
The steps above were carried out with the Pi plugged into a monitor via HDMI
Hope this helps