D. R. Evans composed on 2019-11-11 16:04 (UTC-0700):

> The chip is an E3-1245, which is supposed to be able to operate at 4096x2304
> resolution.

> Any suggestions as to what I might need to do to improve at least the
> logged-in resolution?

Try a different video cable type if you can.

pastebinit /var/log/Xorg.0.log
or
pastebinit ~/.local/share/xorg/Xorg.0.log

whichever of the two exists and is the newer if both exist. From there we might 
be
able to turn an error message into a solution.

At the grub menu use the E key to edit the linux line to include

        plymouth.enable=0
and/or
        video=1920x1080

might be worth testing to see if it makes a difference.
-- 
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 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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