[Bug 1380041] [NEW] Erasing NTFS formatted flash raises AttributeError: 'NoneType' object has no attribute 'get_cached_property'

[Vladimir Rutsky]

Public bug reported:

When I'm trying to erase USB flash I'm get popup with following stack
trace:

org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
    retval = candidate_method(self, *args, **keywords)
  File "/usr/share/usb-creator/usb-creator-helper", line 218, in Format
    parent_dev = _get_parent_object(udisks, device)
  File "/usr/share/usb-creator/usb-creator-helper", line 49, in _get_parent_object
    parent = partition.get_cached_property('Table').get_string()
AttributeError: 'NoneType' object has no attribute 'get_cached_property'

To workaround this problem I've done:
1. Remove existing partition on flash drive in GParted.
2. Create new FAT32 partition for whole flash drive in GParted.
3. Unplug/plug flash drive.
4. Start usb-creator-gtk --- "Make Startup Disk" now active and works.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: usb-creator-gtk 0.2.56.2
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Oct 11 12:00:17 2014
InstallationDate: Installed on 2014-01-01 (282 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: usb-creator
UpgradeStatus: Upgraded to trusty on 2014-04-27 (166 days ago)

** Affects: usb-creator (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

** Attachment added: "part of `udisks --all` output for USB flash"
   https://bugs.launchpad.net/bugs/1380041/+attachment/4231375/+files/udisks.txt

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https://bugs.launchpad.net/bugs/1380041

Title:
  Erasing NTFS formatted flash raises AttributeError: 'NoneType' object
  has no attribute 'get_cached_property'

Status in “usb-creator” package in Ubuntu:
  New

Bug description:
  When I'm trying to erase USB flash I'm get popup with following stack
  trace:

  org.freedesktop.DBus.Python.AttributeError: Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/dbus/service.py", line 707, in _message_cb
      retval = candidate_method(self, *args, **keywords)
    File "/usr/share/usb-creator/usb-creator-helper", line 218, in Format
      parent_dev = _get_parent_object(udisks, device)
    File "/usr/share/usb-creator/usb-creator-helper", line 49, in _get_parent_object
      parent = partition.get_cached_property('Table').get_string()
  AttributeError: 'NoneType' object has no attribute 'get_cached_property'

  To workaround this problem I've done:
  1. Remove existing partition on flash drive in GParted.
  2. Create new FAT32 partition for whole flash drive in GParted.
  3. Unplug/plug flash drive.
  4. Start usb-creator-gtk --- "Make Startup Disk" now active and works.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: usb-creator-gtk 0.2.56.2
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Oct 11 12:00:17 2014
  InstallationDate: Installed on 2014-01-01 (282 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  SourcePackage: usb-creator
  UpgradeStatus: Upgraded to trusty on 2014-04-27 (166 days ago)

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