1280x390 custom resolution in Ubuntu help please

I’m trying to get my vim3 to use 1280x390 as the resolution as my display does not send out the correct EDID. I’ve tried both the 4.9 kernel and the mainline trying to use xrandr to set the resolution, and I usually get the error xrandr: Configure crtc 0 failed.

Can anyone help me out?

@smwoodward We don’t have this resolution document monitor here, where did you buy this monitor from, we will buy one for testing

VSDISPLAY 14.9" 14.9 in 1280X390 LCD Screen LTA149B780F with HD-MI DVI VGA Audio LCD Controller Board M.NT68676, fit for Arcade Machines DIY displays Car Monitor Digital Marquee Gauge Cluster Amazon.com

What is the terminal output of below:

“cvt 1280 390 60”