Reported by waterwingz.

ptpcam also fails

Linux host 3.2.9-1.fc16.x86_64 #1 SMP Thu Mar 1 01:41:10 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Failure is in ptp_transaction, returns 0x2FF (PTP_ERROR_IO) probably from ptp_usb_sendreq

fuser /dev/bus/usb/<bus>/<dev> shows no processes having the device open

Other ptp capable programs (shotwell) are able to access the device

chdk.reset_device does not help