[Bug 1279987] Re: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {})

[gmoore777]

Same results for me.

One 8 GB Cruzer Micro USB causes this problem.
(I had GParted reformat this to FAT32, then to ext4. Same error.)

I have this othe 16 GB Sandisk Cruzer USB, and I don't have a problem
using Startup Disk Creator on it.

If the 8 GB USB is plugged in,  Startup Disk Creator crashes immediately upon starting up.
Or if the 8 GB is not plugged, I can start up Startup Disk Creator, but as soon as I insert the
8 GB USB into the port, Startup Disk Creator crashes immediately.

`lsusb --verbose` shows this for the two USB sticks.

Bus 002 Device 004: ID 0781:5406 SanDisk Corp. Cruzer Micro U3
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0781 SanDisk Corp.
  idProduct          0x5406 Cruzer Micro U3
  bcdDevice            2.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              200mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0

Bus 002 Device 005: ID 0781:5530 SanDisk Corp. Cruzer
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0781 SanDisk Corp.
  idProduct          0x5530 Cruzer
  bcdDevice            1.03
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              200mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               1

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https://bugs.launchpad.net/bugs/1279987

Title:
  usb-creator-gtk crashed with TypeError in __call__(): first argument
  must be the method signature string: GLib.Variant('a{sv}', {})

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

Bug description:
  Crashed when trying to create a start-up disk.  Got as far as trying
  to erase the USB drive when it froze and I got the error.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: usb-creator-gtk 0.2.53
  ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Thu Feb 13 16:17:24 2014
  ExecutablePath: /usr/bin/usb-creator-gtk
  InstallationDate: Installed on 2014-01-24 (19 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140121.1)
  InterpreterPath: /usr/bin/python3.3
  ProcCmdline: /usr/bin/python3 /usr/bin/usb-creator-gtk
  PythonArgs: ['/usr/bin/usb-creator-gtk']
  SourcePackage: usb-creator
  Title: usb-creator-gtk crashed with TypeError in __call__(): first argument must be the method signature string: GLib.Variant('a{sv}', {})
  UDisksDump: Error: [Errno 2] No such file or directory: 'udisks'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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