Bug#784229: startupmanager: [startupmanager] Bootloader menu resolution breaks jessie boot

Package: startupmanager
Version: 1.9.13-8
Severity: critical
Justification: breaks the whole system

Dear Maintainer,

Bootloader menu resolution breaks jessie boot.

Reproduce:
1) Go in Startupmanager --> Advanced.
2) Set Bootloader menu resolution to 800x600 or higher.
3) Close startup manager.
4) Reboot and see that jessie is not booting anymore.

Do you mind investigating?

-- System Information:
Debian Release: 8.0
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

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

Versions of packages startupmanager depends on:
ii grub-pc            2.02~beta2-22
ii menu               2.1.47
ii python             2.7.9-1
ii python-glade2      2.24.0-4
ii python-gnome2      2.28.1+dfsg-1.1
ii python-libxml2     2.9.1+dfsg1-5
pn python:any         <none>
ii x11-xserver-utils 7.7+3+b1
ii yelp               3.14.1-1

startupmanager recommends no packages.

startupmanager suggests no packages.

-- no debconf information