Bug#953810: /usr/bin/xmag: [xmag] Doesn't show the pixel RGB value any more.

[Geert Uytterhoeven <geert@linux-m68k.org>]

I'm having the same problem with xmag in Ubuntu.
In fact this is not limited to xmag.  Xfig (1:3.2.7b-2 in Ubuntu)
suffers from a similar issue: when adding a new color by using
"Lookup and Add", xfig may crash with an X_QueryColors badValue trap.

The problem seems to be related to the type of window you're trying
to query a pixel color of:
  - In "classic" X11 apps (xmag, fig2dev, even the icons in the
    GNOME taskbar), xmag and fig2dev can query colors fine,
  - In "modern" composed/anti-aliased apps (gnome-terminal, chromium),
    X_QueryColors fails.

I do not know if this is a bug in these applications, or in some
other layer (X libs, X server, compositor, ...).

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds