Arch Linux

Description:

mpt-probe causes my Canon USB scanner to no longer function properly.
I normally use the Scanner in a VirtualBox machine.
Starting the machine up results in this error message:

"Failed to create a proxy device for the USB device. (Error: VERR_READ_ERROR)"

Removing the mtp-probe binary works as a temporary solution. I cannot uninstall libmtp because it is a vlc dependency.

The new version 1.1.1 of libmtp (http://sourceforge.net/projects/libmtp/files/libmtp/1.1.1/) fixes the problem permanently.
See attached PKGBUILD file.
It is necessary to remove the switch "--with-udev-rules=52-libmtp.rules" in the configure step since otherwise udev rules for mtp devices are called too early.

Upstream uses 69 as new default level according to the changelog:

- udev rule prio for probe command set to come after
most other devices including SANE, so now we use
level 69.

Additional info:
* libmtp 1.1.0


Steps to reproduce:
* Boot computer with scanner connected
* Start virtual machine
* The above error occurs and the scanner is not available