[04:08] <Marine1> On my HP Officejet 4500 try to scan object via simple scan or X-sane and  neither seem to complete the operation. It has some sort of delay then  it goes dark gray with the following: Failed to start scanner error  during device I/o. It has no problem finding the device.
[04:08] <Marine1> This is from var/log/syslog: xsane:  io/hpmud/dot4.c 480: unable to read Dot4Reverse Data header: Resource  temporarily unavailable hp:/usb/Officejet_4500_G510n-z?serial=CN048H505M05HR
[04:08] <Marine1> Any takers