IOError: [Errno 19] No such device

Complete output from jockey-gtk:

(jockey-gtk:2962): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion `icon_set != NULL' failed

(jockey-gtk:2962): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion `icon_set != NULL' failed
Exception in thread thread_call_progress_dialog:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 504, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
DBusException: org.freedesktop.DBus.Python.IOError: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.7/dist-packages/jockey/backend.py", line 173, in detect
    self.hardware = detection.get_hardware()
  File "/usr/lib/python2.7/dist-packages/jockey/detection.py", line 905, in get_hardware
    result = _get_modaliases()
  File "/usr/lib/python2.7/dist-packages/jockey/detection.py", line 659, in _get_modaliases
    modalias = open(os.path.join(path, 'modalias')).read().strip()
IOError: [Errno 19] No such device

Traceback (most recent call last):
  File "/usr/bin/jockey-gtk", line 418, in <module>
    sys.exit(u.run())
  File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 468, in run
    self.ui_show_main()
  File "/usr/bin/jockey-gtk", line 94, in ui_show_main
    self.update_tree_model()
  File "/usr/bin/jockey-gtk", line 274, in update_tree_model
    for h_id in self.get_displayed_handlers():
  File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 819, in get_displayed_handlers
    return self.backend().available(self.argv_options.mode)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/lib/python2.7/dist-packages/jockey/backend.py", line 212, in available
    handler_names = self.handlers.keys()
AttributeError: 'Backend' object has no attribute 'handlers'

My bug report might be a duplicate of this:

https://bugs.launchpad.net/bugs/335567

but the package mentioned is different. jockey-backend

Thanks for taking your time to report this issue and help making Ubuntu better.

I am not sure about the part resulting in "IOError: [Errno 19] No such device", but the "AttributeError: 'Backend' object has no attribute 'handlers'" is the same as bug 946973. It looks like there might be two unrelated issues here.

@Malin: can you please download the attachment, run the program as follows, and attach its output?

python test_modalias_bug.py

This will probably shed more light on what's going on.

Here is the output:

lakris@ubuntu:~/Downloads$ python test_modalias_bug.py
Error opening /sys/devices/vio/modaliaspath: /sys/devices/vio
dirs: ['subsystem', 'power']
files: ['uevent', 'name', 'devspec', 'modalias']
Operation complete