Hi everyone, Working on support for a new business oriented all-in-one for iscan, I have hit a dead end and would appreciate some insights/suggestions.
When attaching the device, the kernel loads the usblp module and CUPS has no trouble finding the printer part. On the scanner side however, the device is (usually) found but I can't get it to scan. Looking at the debugging info, this is what happens: # SANE frontend is started device is opened backend sends a reset device acknowledges backend queries for some status info device replies with status info device is closed # request preview via frontend device is opened backend sends a reset device does not acknowledge within timeout period (60 seconds) FYI, 60 seconds is plenty time to reset the device and acknowledge the reset, so I am at a loss why I'm not getting acknowledged. Without it the backends signals an I/O error and correctly refuses to continue. # Repeated requests for a preview also do not get acknowledged Aware of trouble in the past[1][2], I power cycled the device, rmmod'd usblp and tried again. When doing this, I have absolutely no trouble scanning whatsoever but now CUPS no longer sees the printer part. Considering the target audience for this device, I can't very well say "Oh, just rmmod usblp before you scan and insmod usblp again when you are done". Similarly, suggesting to compile a CUPS usb backend using usb-libusb.c[1] is also not particularly user friendly. # Besides I haven't checked (yet) whether that (still) works. Is there a way to get SANE, CUPS and usblp to play nice _together_? I'd sure like to know. FWIW, I've tried this on Debian GNU/Linux testing/unstable development machine (up-to-date as of 2006-12-14 with a 2.6.18 kernel) and a stock workstation FC3 install. References: [1] http://lists.alioth.debian.org/pipermail/sane-devel/2005-September/014721.html [2] http://bugzilla.kernel.org/show_bug.cgi?id=5001 [3] https://alioth.debian.org/tracker/index.php?func=detail&aid=302207&group_id=30186&atid=410366 -- Olaf Meeuwissen EPSON AVASYS Corporation, SE1 FSF Associate Member #1962 sign up at http://member.fsf.org/ GnuPG key: 6BE37D90/AB6B 0D1F 99E7 1BF5 EB97 976A 16C7 F27D 6BE3 7D90 Penguin's lib! -- I hack, therefore I am -- LPIC-2
