Hi Stef, ahh, thanks for the reply. 1.0.22 from your PPA seems to work! In case they are of interest, I have attached the debug logs for all three versions I tested.
I have no idea, whether this is significant, but one difference I saw was a line concerning the invocation of "gl841_init_motor_regs_scan": [genesys_gl841] gl841_init_motor_regs_scan : scan_exposure_time=5600, scan_yres=300, scan_step_type=1, scan_lines=3531, scan_dummy=0, feed_steps=373, scan_power_mode=0, flags=0 For 1.0.20 and 1.0.22, flags is set to 0, whereas it is set to 2 in 1.0.21. Ok, so lets see, if can get it work again on that armel system. Kind regards, Mali Am 03.01.2011 22:08, schrieb stef: > Le Monday 03 January 2011 13:57:35 Mali, vous avez ?crit : >> Hi, >> >> as of 1.0.21 support for Lide 50 (genesys backend) seems to be broken. >> >> Scanning in gray or lineart mode makes the head move a little bit (some >> millimeters), stay in that position and make a high-frequency noise for >> some time and then return to the starting position. As to my >> understanding the head is positioned at the starting position for the >> actual scan, the scan itself fails. The resulting image is completely >> black. >> >> When scanning in color mode, the behaviour is different. The head >> actually moves during scanning. It looks like it is moving at twice the >> intended speed: When the whole page has been scanned, it can be seen in >> "Simple Scan" compressed to half the normal height. The head continues >> to move against a mechanical stop inside the scanner for the some time, >> producing the other half of the image in "Simple Scan" (and a noise even >> uglier than the one above). >> >> I am quite sure that I have seen the gray/lineart behaviour in color >> mode, too, but at the moment cannot explain what triggers either of the >> failure modes. >> >> I am trying this on a Ubuntu Maverik x86_64 system. Debian Squeeze >> (x86_64 and Armel) behave the same. Frontends used were Simple Scan and >> scanimage. >> >> After going back from libsane 1.0.21-2ubuntu2 to 1.0.20-13ubuntu2, >> everything again works as normal. So, to me, it looks like something >> might have changed from 1.0.20 to 1.0.21 breaking the compatibility with >> the older scanners. >> >> As far as I see, others are affected by the same problem: >> >> https://bugs.launchpad.net/ubuntu/+source/sane-backends/+bug/680892 >> >> http://lists.alioth.debian.org/pipermail/sane-devel/2010-August/027343.html >> >> Otherwise, I found no indication this behaviour has been discussed on >> this list. >> >> Maybe, it already to late for 1.0.22, but hopefully the working state >> can be restored. >> >> Kind regards, >> >> Mali >> >> >> >> -- >> sane-devel mailing list: sane-devel at lists.alioth.debian.org >> http://lists.alioth.debian.org/mailman/listinfo/sane-devel >> Unsubscribe: Send mail with subject "unsubscribe your_password" >> to sane-devel-request at lists.alioth.debian.org > Hello, > > thanks for the bug report. Since you can run a working and a non working > version, it would be higly interesting to run scanimage with debug enabled > with bot versions so that I can try to compare bog debug traces and find what > is going on. > You'll enable debug log by doing in a command shell: > export SANE_DEBUG_GENESYS=255 > export SANE_DEBUG_GENESYS_LOW=255 > export SANE_DEBUG_GENESYS_GL841=255 > then by running scanimage in the same command shell: > scanimage -d genesys>scan.pnm 2>debug.log > You'll need the debug version of the packages. Send both debug.log > files. > > Last you may try a recent package at https://launchpad.net/~stef- > dev/+archive/sane-backend-genesys so you'll can check if the bug is still > present in the git tree. > > Regards, > Stef -------------- next part -------------- A non-text attachment was scrubbed... Name: debug-1.0.20.log.bz2 Type: application/x-bzip Size: 9842 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110104/b7053844/attachment-0003.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: debug-1.0.21.log.bz2 Type: application/x-bzip Size: 9948 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110104/b7053844/attachment-0004.bin> -------------- next part -------------- A non-text attachment was scrubbed... Name: debug-1.0.22.log.bz2 Type: application/x-bzip Size: 7876 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20110104/b7053844/attachment-0005.bin>
