[jei1965]

I have Calibre 64 bit and It does not detect my 7 inch Lenovo tablet.

Here is the debug output when the device is connected

calibre 0.9.22 [64bit] isfrozen: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.3
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
USB devices on system:
[u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4399&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\vid_046d&pid_c52b&rev_1201',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_00',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_01',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_02',
u'usb\\vid_17ef&pid_743a&rev_0255']
Unable to get free space for drive: A
(21, 'GetDiskFreeSpaceEx', 'The device is not ready.')
Unable to get free space for drive: E
(21, 'GetDiskFreeSpaceEx', 'The device is not ready.')
Drives detected:
(0) F:\ ~ \\?\STORAGE#VOLUME#_??_USBSTOR#DISK&VEN_LINUX&PROD _FILE-CD_GADGET&REV_0000#0123456789ABCDEF&0#{53F56307-B6BF-11D0-94F2-00A0C91EFB8B}#{53F5630D-B6BF-11D0-94F2-00A0C91EFB8B}

No disabled plugins
Looking for devices of type: MTP_DEVICE
List of WPD PNP ids:
[u'\\\\?\\wpdbusenumroot#umb#2&37c186b&0&storage#vo lume#_??_usbstor#disk&ven_linux&prod_file-cd_gadget&rev_0000#0123456789abcdef&1##{6ac27878-a6fa-4155-ba85-f98f491d4f33}',
u'\\\\?\\wpdbusenumroot#umb#2&37c186b&0&storage#vo lume#_??_usbstor#disk&ven_linux&prod_file-cd_gadget&rev_0000#0123456789abcdef&0##{6ac27878-a6fa-4155-ba85-f98f491d4f33}']
No suitable MTP devices found

Looking for devices...

Devices possibly connected: None

and here is the debug when disconnected

calibre 0.9.22 [64bit] isfrozen: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.3
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
USB devices on system:
[u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4397&rev0000',
u'usb\\root_hub&vid1002&pid4399&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\root_hub20&vid1002&pid4396&rev0000',
u'usb\\vid_046d&pid_c52b&rev_1201',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_00',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_01',
u'usb\\vid_046d&pid_c52b&rev_1201&mi_02']
Unable to get free space for drive: A
(21, 'GetDiskFreeSpaceEx', 'The device is not ready.')
Drives detected:

No disabled plugins
Looking for devices of type: MTP_DEVICE
The Windows WPD service says there are no portable devices connected

Looking for devices...

Devices possibly connected: None

I tried this on Windows 7 and Ubuntu and I get the same results.

Can you add this device to the list of detected devices.

Thank you