ubuntu 20.10, was 18.04, now emacs frame size not honored

I've upgraded from Ubuntu 18.02 to 20.10.
Emacs was upgraded to 26.3. I'm setting my frame-size in .emacs using

(setq initial-frame-alist '((top . 1) (left . 1) (width . 80) (height . 44)))
(setq default-frame-alist '((width . 80) (height . 44)))

Now my emacs windows are instantiated with frame with of 79, never 80. I even elimiated ~/.emacs and started it from the command line using `-geometry 80x20' but still have 79 columns. This all worked with 18.04.

Any ideas what the issue might be or how to chase it down?

Check if there is an X resources file which would override your init

Thanks for the .Xresources suggestion. I did have something set, to 80 columns. I commented it out and rebooted but the same behavior exists. I think it might be related to fonts. I don't know how to check the fonts, but if I try to "set default font .." it looks like I have 'Ubuntu Mono Regular" 13.