/etc/init/failsafe-x.conf is in xdiagnose 2.5.2ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | # failsafe-x - Recovery options if display manager fails to start
#
# If display manager exits non-zero, something is wrong - launch the
# failsafe-X interface
description "Recovery options if display manager fails to start"
start on stopped lightdm EXIT_STATUS=[!0] or stopped gdm EXIT_STATUS=[!0]
stop on runlevel [06]
task
exec /usr/share/xdiagnose/failsafeXServer "$JOB"
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