Hi all, I recently installed an hp 7650 usb scanner (previously functioning with Win2K) on my Dell PE840 server running Ubuntu 10.04. Sane-utils 1.0.20-13ubuntu2 provides the device interface and client access is through Xsane 0.996-2ubuntu1.1. The scanner passes on scanimage --test. I am able to scan color and mono and scan multipage documents up to a resolution of 300dpi, but above that the scanner hangs part of the way through the first page. Another issue, which I worked around, was that the units were in inches but the digits were the corresponding centimeter value; I forced the size to 8.5 x 11 inches and sorted out that issue. Now the scanner captures all of the first page and about 0.3 inches of the second page, producing a cumulative page content error for all subsequent pages. I set the page length to 10.700 inches to work around that issue, but any residual error will grow to the point of being a problem for larger documents. It seems as though sane is not looking for the end of the page, and I believe that detection capability exists in this hp device. It also seems like I am violating some page or file size limit when I raise the scan resolution, but my search turned up no reference to such a configuration parameter.
The sane website reports this scanner as status "complete" and describes the device in the hp5590 manpage: ScanJet 7650, USB, 0x03f0/0x1805, Complete, Lineart/grayscale/color (24 bit), 100/200/300/600/1200/2400 DPI, flatbed/ADF/ADF duplex/TMA slides/TMA negatives, hp5590 (1.0.5), sane-hp5590. The scanner is also properly described on both the server and the client in response to the scanimage -L command. It seems unlikely that I had a hardware failure coincident with moving the usb cable between two side by side towers. Am I missing a config file or configuration parameter that will resolve the resolution and pagelength issues? Do you know where I can find a thread or application note on these issues? Is there another backend that better supports the hp 7650? -- Michael J Eurice
