PINE64

HDMI to standard computer monitor. 
The monitor native resolution is 1680x1050. 
Settings->Display selection is HDMI. 
Resolution list shows 1680x1050 as an option but if I click 1680X1050p-60 the screen goes black then comes back with no change. 
Always defaults to 1280x720p-60.


Monitor ViewSonic VA2226w
Native Resolution 1680 x 1050 at 60 Hz

Tried 

Android 7.1.2 Stock Image [microSD Boot] [Rooted] [20171204]
Android TV 7.1 Community Build Image [microSD Boot] by ayufan

your monitor is listed as dvi-d so you should be using a dvi-d to hdmi adapter? one issue with dvi-d to hdmi is the hdmi copy protection signal is messed up/not understood by the dvi-d monitor since at the time they were made that protection had not be in place. but another thing is there may be a config file that needs to be changed. you might want to join the chat and see if the devs can help you.

Forgot the monitor has an hdmi to dvi adapter. My other monitor has displayport but no hdmi. Oh well gives me an excuse to get the Eizo monitor I have been lusting after. 

  dkryder I owe you a beer