Jul  7 12:27:51 ubuntu ubiquity[4375]: Ubiquity 17.04.9
Jul  7 12:27:51 ubuntu ubiquity[4375]: Exception in GTK frontend (invoking crash handler):
Jul  7 12:27:51 ubuntu ubiquity[4375]: Traceback (most recent call last):
Jul  7 12:27:51 ubuntu ubiquity[4375]:   File "/usr/lib/ubiquity/bin/ubiquity", line 655, in <module>
Jul  7 12:27:51 ubuntu ubiquity[4375]:     main(oem_config)
Jul  7 12:27:51 ubuntu ubiquity[4375]:   File "/usr/lib/ubiquity/bin/ubiquity", line 641, in main
Jul  7 12:27:51 ubuntu ubiquity[4375]:     install(query=options.query)
Jul  7 12:27:51 ubuntu ubiquity[4375]:   File "/usr/lib/ubiquity/bin/ubiquity", line 270, in install
Jul  7 12:27:51 ubuntu ubiquity[4375]:     wizard = ui.Wizard(distro)
Jul  7 12:27:51 ubuntu ubiquity[4375]:   File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 239, in __init__
Jul  7 12:27:51 ubuntu ubiquity[4375]:     self.watch = Gdk.Cursor.new(Gdk.CursorType.WATCH)
Jul  7 12:27:51 ubuntu ubiquity[4375]: TypeError: constructor returned NULL
Jul  7 12:27:51 ubuntu ubiquity[4375]: 
Jul  7 12:27:52 ubuntu ubiquity[4375]: log-output -t ubiquity /usr/share/apport/apport-gtk
Jul  7 12:27:57 ubuntu kernel: [  774.404538] update-notifier[4425]: segfault at 0 ip           (null) sp 00007ffd666ed328 error 14 in update-notifier[5580e6078000+e000]