The problem seems triggered by the fake cdroms on SanDisk Cruzers
Following the stack trace ...
/usr/lib/python3.4/bdb.py(431)run()
-> exec(cmd, globals, locals)
<string>(1)<module>()
/usr/bin/usb-creator-gtk(74)<module>()
-> allow_system_internal=options.allow_system_internal)
/usr/lib/python3/dist-packages/usbcreator/frontends/gtk/frontend.py(185)__init__()
-> self.backend.detect_devices()
/usr/lib/python3/dist-packages/usbcreator/backends/udisks/backend.py(73)detect_devices()
-> self._udisks_obj_added(obj)
/usr/lib/python3/dist-packages/usbcreator/backends/udisks/backend.py(92)_udisks_obj_added()
-> self._udisks_cdrom_added(obj, block, drive, path)
/usr/lib/python3/dist-packages/usbcreator/backends/udisks/backend.py(111)_udisks_cdrom_added()
-> mount = fs.mount_sync(no_options, None)
> /usr/lib/python3/dist-packages/gi/overrides/Gio.py(152)__call__()
-> raise TypeError('first argument must be the method signature string: %r' %
signature)
.. of the exception which is trigered by
if not isinstance(signature, str):
on line 151 on /usr/lib/python3/dist-packages/gi/overrides/Gio.py
prints in pdb3 give following values for the arguments:
p signature
GLib.Variant('a{sv}', {})
p str
<class 'str'>
Unfortunately, my knowledge of glib/dbus is zilch and python minimal
so i gave up and simply commented out lines 91-92 of
/usr/lib/python3/dist-packages/usbcreator/backends/udisks/backend.py
the lines
if drive and drive.get_cached_property('Optical').get_boolean():
self._udisks_cdrom_added(obj, block, drive, path)
Obviously that hack wouldn't work if you want to clone an actual cd in
the cdrom drive but works perfectly for .iso images
btw: Bug #1279987 seems a duplicate of this
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https://bugs.launchpad.net/bugs/1302295
Title:
usb-creator-gtk errors during app startup
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