"q"s and "x"s as line graphics on Linux console

[Patrick McDermott]

Hello,

I'm using ncurses 6.2-20210109 and dialog 1.3-20201126.  It works fine
on VTE, but on the Linux framebuffer console the line graphics are drawn
with characters like "q" and "x".  For example:

    $ dialog --msgbox 'Hello, world!' 5 17
    lqqqqqqqqqqqqqqqk
    x Hello, world! x
    tqqqqqqqqqqqqqqqu
    x   <  OK  >    t
    mqqqqqqqqqqqqqqqj

My environment is `TERM=linux LC_ALL=C` (I also tried `LC_ALL=en_US` and
variants of the "linux" terminal found in terminfo).  I'm using 8-bit
ncurses, but I've also tried a wide-character build.  I've tried setting
`NCURSES_NO_UTF8_ACS=1`, and a glance at the ncurses source shows that
`TERM=linux` already disables ACS.  I'm not using a UTF-8 locale
encoding because I'm using Linux's built-in (8-bit) fbcon fonts.

I've read the FAQ on this issue [1] (and similar discussions online),
but it doesn't seem to offer a solution in this case (unless there's
some other $TERM I should try).  Any suggestions?

[1]: https://invisible-island.net/ncurses/ncurses.faq.html#no_line_drawing

Thanks,
-- 
Patrick McDermott, CEO
Libiquity
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