re: port-amd64/57236 (Gude, 9.8, https://netbsd.org/docs/guide/en/chap-x.html#chap-x-xdm is wrong)

[matthew green <mrg%eterna.com.au@localhost>]

>  The issue is basically that as we presently distribute xdm, it won't
>  interoperate properly with some modern X applications, because the
>  authorization mechanism it defaults to doesn't work. This was surprising
>  to me as well (I don't use xdm or any other display manager), as the
>  error messages aren't clear here about what's happening. I was able to
>  reproduce this myself and test the configuration tweak.
>  
>  Other BSDs and Linux distros dealt with this years ago; e.g., FreeBSD
>  changed the default in the configuration to be what I suggested, Debian
>  changed xdm's compilation settings to fundamentally disable the xdm
>  authorization method, etc. I feel NetBSD should do something of the sort
>  as well, but that probably requires discussion among developers. So, for
>  now, I've adjusted chapter 9.8 in the guide to add this detail.

i'm confused.  the default should be:

   "XDM-AUTHORIZATION-1 MIT-MAGIC-COOKIE-1"

so i'm not sure why the xdm-config setting is needed.  or is it
that "XDM-AUTHORIZATION-1" method doesn't work at all, and it
can only be "MIT-MAGIC-COOKIE-1"?  this seems to be the default,
since libXdcmp default to including XdmcpWrap.c, which means
xdm finds it and enables xdm auth methods.

anyway, we can fix this i'm sure, but i don't understand what's
wrong or why the change helps.

thanks.


.mrg.