Hi Dan, It could be helpful if you sniff the usb protocols on a Windows machine. Then I can compare them with Sane and patch it. Please use this program: http://www.sane-project.org/README.linux and scan a small area of approx. 5mm x 5mm @ 75 dpi to reduce the logfile size.
Cheers, Rolf Am 17.01.2013 21:10, schrieb Dan Duvall: > (Sorry, sent again. Forgot to CC the list.) > > I'm still seeing the same behavior after recompiling without pthread support > (through, looking at `configure --help`, it says this is the default under > OSes other than OS X). > > One other thing that I forgot to mention is that this > first-scan-works-second-scan-hangs behavior is following a power cycle of the > scanner. Also, if I power off the scanner while it's timing out on the second > scan?which is what people in the office tend to do?it sends scanimage into an > infinite loop. I've frequently seen several saned processes spiking the CPU > on this server which I attribute to this. > > Could an strace or gdb session help diagnose the problem? I'm willing to > really dig in given the right direction. > > Thanks for the help! > Dan > > On Jan 17, 2013, at 7:33 AM, Rolf Bensch <rolf at bensch-online.de> wrote: > >> Hi Dan, >> >> Maybe enabled pthread support is the problem, especially for linux. >> >> I would upgrade sane on your lenny system to 1.0.24 with pthread support >> disabled. >> >> Cheers, >> Rolf >> >> >> >> Am 17.01.2013 14:32, schrieb Rolf Bensch: >>> >>> >>> Am 16.01.2013 23:35, schrieb Dan Duvall: >>>> Hey there, >>>> >>>> I'm having trouble scanning using the pixma backend with a Canon >>>> imageClass MF4150 over USB. The first scan always seem to succeed while >>>> subsequent attempts timeout. >>>> >>>> These are the commands I'm running. >>>> >>>> SANE_DEBUG_PIXMA%6 scanimage 2> pixma_debug-success.log >>>> SANE_DEBUG_PIXMA%6 scanimage 2> pixma_debug-timeout.log >>>> >>>> stderr of each: >>>> https://gist.github.com/4551560 >>>> https://gist.github.com/4551574 >>>> >>>> I get this same behavior using sane-backends 1.0.22 on Debian lenny, and >>>> 1.0.24 on OS X 10.8.2. >>>> >>>> Any suggestions on how to further debug? >>>> >>>> Thanks! >>>> Dan >>>> >
