Created attachment 2768 [details]
Konsole session configuration

Seems to work fine here... Do you have any more info?

This probably isn't a TDE bug.

The Liberation font doesn't include glyphs for the braille characters and so the default will be to show the absence of a glyph, usually a rectangle.

Font configuration is handled by fontconfig and the default font directory which konsole uses is /usr/share/fonts/TTF - other applications might use their own font directories.

If there is another font in that directory which is associated through fontconfig with Liberation, and which has the required glyph, that glyph will be substituted for the absent one in the Liberation font.

As you're seeing the glyph in an xterm I would think that it's either using its own font directory which contains a font with braille glyphs or it's not using a Liberation font.

So it looks as though your /usr/share/fonts/TTF directory doesn't contain any fonts with braille glyphs.
Check with:

$ grep uni2875 /usr/share/fonts/TTF/*

I'm guessing you'll get no output - I get a bunch of DejaVu fonts, although surprisingly, the DejaVuSansMono.ttf font doesn't have the braille glyphs.

So with printf '\u2875\n' I see the braille character, but if I remove the non-Liberation fonts, and in a new instance of konsole, I see the rectangle.

I tried with liberation mono selected as font in Konsole and still see the braille character.
I agree that this is probably a font related thing, not a TDE bug.
The question is: should we keep this bug open and if so, what to look at? Or close it?

If you're seeing the braille character when using Liberation mono, then a substitution is being made.

Do
$ grep uni2875 /usr/share/fonts/TTF/*

If there aren't any files listed, then konsole must be using a different fonts directory**.


If there are files listed, move them to a temporary location.
Then start a new instance, not a new session, of konsole, and the character shown should be a rectangle.

If it's not, then konsole must be using a different fonts directory**.


** See <!-- Font directory list --> in /etc/fonts/fonts.conf
If you're still seeing the braille character then konsole must be using a substitution from a font in one of those directories.

Thanks Ray, 
very informative. No, there are fonts listed as output of the grep command.
When/if I get to look into this bug, I will test a clean VM (my systems has a lot of stuff installed) and see what happens there. Unless you get around and fix it before that ;-)

This is not a bug ..

> I tried with liberation mono selected as font in Konsole and still see the braille character
  This is expected behaviour - Liberation font in konsole displays braille characters ..

> there are fonts listed as output of the grep command
  .. when it can access a font which includes braille glyphs.

So there is no problem with TDE/konsole.

If Liberation is to be used as the konsole font, the fix is to also install a font containing braille glyphs where konsole can access it.
For example, install DejaVuSans.ttf in /usr/share/fonts/TTF/.

This is a system/distribution issue, not TDE.

> should we keep this bug open ... Or close it?
  Close it

Ok, I am happy with your point of view and agree that this is not a Konsole issue.