[Pkg-xfce-devel] Bug#765077: lightdm-gtk-greeter: Language selection is broken (again)

[pzs-fs at yandex.ru (Vladimir K)]

Strange. I've just installed lightdm on another fully updated Jessie system, and now I get system default language in session.

$ locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

By the looks of it, lightdm does not even touch locale, judging by the upper case 'UTF-8' string.
What can affect the ability of lightdm to change locale on login?
In the morning I hope to get my hands around another system on which lightdm presumably works right to re-check things.
Have you ever tested any workarounds for the original #679386 bug? May we both forgot to clean up some old version of xsession dirty hack that causes seemingly right behavior, (and changes case of LANG string)? Anyway, I'll recheck everything on another system in the morning.