Could you set the resolution with xrandr using a systemd service? Using something like
this seems promising.
From: Dennis Payne via WLUG <wlug@lists.wlug.org> Sent: Sunday, February 24, 2019 8:23 PM To: wlug@lists.wlug.org Cc: Dennis Payne Subject: [WLUG] DVI Initial Resolution
I've had the cub scouts build an arcade machine. The TV being used for
display is connected by DVI. Fedora defaults to a resolution the TV
does not support. If I hookup a monitor on the VGA port I can set the
resolution of the second monitor but it switches back to an unsupported
resolution when the second monitor is disconnected. Anyone know how to
force a specific resolution on boot?
--
Dennis Payne <dulsi@identicalsoftware.com>
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