Segfault when no usb drivers installed (within XenServer Ubuntu 12.04.1 Server 32bit VM)

[Hamish Goodwin]

When attempting to scan from an HP OfficeJet 6300 via network using hp-scan or SANE, the drivers appear to try and access libusb which isn't able to initialise as there are no usb devices attached to this Virtual Machine. This causes a segmentation fault and the scan fails.

This also happens when running hp-check. hp-setup works fine and installs the printer/scanner and fax printer.

OS: Ubuntu Server 12.04.1 LTS 32 bit
VM Hypervisor: XenServer 6.1

[Hamish Goodwin (goodhamish)]

Have just found a workaround for this - install the usbip client which installs a virtual usb bus.

Instructions: http://www.howtoforge.com/how-to-set-up-a-usb-over-ip-server-and-client-with-ubuntu-10.04-p2 (only need to install the package and modprobe it and add it to /etc/modules)

[Sarbeswar Meher (sarbeswar-meher)]

This bug is not related to HPLIP, however a thirdparty USB driver is missing. Changing the status to 'Invalid' as there is no code change required to fix the problem.

[Tom Noonan II (z-tom-u)]

I disagree: When trying to configure a network scanner, why should hplip require USB support? When the user specifies a network device hplip should not try and initialize the USB bus: it is not the expected or requested behavior.

Why does hplip need libusb to control network devices?

[Tom Noonan II (z-tom-u)]

Reopening as I believe hplip is calling libusb (resulting in a segmentation fault) in a use case where USB should not be used.