Bad handling of unknown usb/pci class codes

[Marcin Juszkiewicz]

12:21 root@puchatek:udev-discover-0.2# udev-discover
/usr/lib/python2.7/dist-packages/gi/types.py:44: Warning: g_object_set_qdata: assertion `G_IS_OBJECT (object)' failed
  return info.invoke(*args)
Traceback (most recent call last):
  File "/usr/bin/udev-discover", line 562, in <module>
    UDevDiscoverGUI()
  File "/usr/bin/udev-discover", line 302, in __init__
    self.populate(self.device_finder.get_devices())
  File "/usr/bin/udev-discover", line 372, in populate
    self.add_new_device(device)
  File "/usr/bin/udev-discover", line 385, in add_new_device
    [device.path, device_icon, device.nice_label,
  File "/usr/lib/pymodules/python2.7/udevdiscover/device/usb.py", line 236, in nice_label
    usb_type[1], usb_type[2])
  File "/usr/lib/pymodules/python2.7/udevdiscover/utils.py", line 119, in __call__
    value = self.func(*args)
  File "/usr/lib/pymodules/python2.7/udevdiscover/device/usb.py", line 176, in get_usb_short_long_names
    return usb_class_names[tuple(key)]
KeyError: (7, 1, -1)

[Juanje Ojeda (juanje)]

Hi Marcin, thanks for your feedback.

Could you unplug your usb devices and then launch the udev-discover? It seems that one of the usb devices has or hasn't some property expected by the code, so it could be great if you could plug the devices one by one after the udev-discover be launched to identify it.

If you can't unplug all of them, at least try with what you can to reduce the options.

By the way, you don't need to be root or to use 'sudo' command to use udev-discover.

Thanks for your time :-)

[J. Félix Ontañón (fontanon)]

Hi Marcin,

This is related with a bad handle of unknow usb class codes.
Udev-discover should use a fallback name for unknow class codes for usb and pci devices but it seems not to work. This is a real bug that needs to be fixed.

[J. Félix Ontañón (fontanon)]

Fix commited
https://github.com/fontanon/udev-discover/commit/78adde19275fd70fce9f987aba9d3537dfc8e385

Patch added

[Marcin Juszkiewicz (hrw)]

Works fine now - does not crash when printer in connected.

Debug info when printer got connected while app was run:
21:24:04 INFO - Device added: USB Device
21:24:04 INFO - Device added: Printer Interface
21:24:04 INFO - Device added: USB Interface

[J. Félix Ontañón (fontanon)]

Really thanks for your feedback