gphoto2 lib_usb_bulk_transfer timeout

[Mahesh]

>>>>>
If I do "tail -f <log_file>" I get the above error printed for some time and then a huge amount of data starts getting written (after say 20 seconds or so)

6.666016 ptp_usb_getdata (2): Reading PTP_OC 0x1008 (Get object info) data...
6.666036 gp_port_read (3): Reading 1024 = 0x400 bytes from port...
6.666151 gp_libusb1_read libusb1.c:577: 'libusb_bulk_transfer (port->pl->dh, port->settings.usb.inep, (unsigned char*)bytes, size, &curread, port->timeout)' failed: Pipe error (-9)
6.666185 gp_port_read gphoto2-port.c:437: Reading 1024 = 0x400 bytes from port failed: Error reading from the port (-34)
6.666203 ptp_usb_getpacket (2): Clearing halt on IN EP and retrying once.
6.666221 gp_port_usb_clear_halt (2): Clear USB halt...
6.666282 gp_port_read (3): Reading 1024 = 0x400 bytes from port...

>>>>>
Command used:
$ gphoto2 --auto-detect --set-config=/main/capturesettings/shutterspeed=43 --debug --debug-logfile=./mrv.log
$ gphoto2 --auto-detect --capture-image-and-download --debug --debug-logfile=./mrv.log
$ tail -f ./mrv.log

>>>>>>
The error occurs only if a capture of more than (say) 2-3 seconds is triggered !