Bug#850577: grub-choose-default does not starts due to python error

[alvaro <alvarorincon2005@gmail.com>]

Package: grub-choose-default
Version: 0.2-6
Severity: important

Dear Maintainer,

grub-choose-default does not starts
errors:

root@sinamaica:~# grub-choose-default
Using /boot/grub/menu.lst and /boot/grub/default
Getting entries
Getting default
Creating window, might take a second
No protocol specified
No protocol specified
Traceback (most recent call last):
  File "/usr/sbin/grub-choose-default", line 325, in <module>
    tk_root = Tk()
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1813, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive,
wantobjects, useTk, sync, use)
_tkinter.TclError: couldn't connect to display ":0"
root@sinamaica:~#



-- System Information:
Debian Release: 8.6
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/1 CPU core)
Locale: LANG=es_ES.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages grub-choose-default depends on:
ii  grub-legacy [grub]  0.97-70
ii  menu                2.1.47
ii  python              2.7.9-1
ii  python-tk           2.7.8-2+b1

grub-choose-default recommends no packages.

grub-choose-default suggests no packages.

-- no debconf information