Dear developers, I am trying to develop another web-based interface for sane. Faced with a problem, and do not know how to avoid it or solve it.
I have Canon LiDE 210 scanner, it works fine with genesys backend. Locally scanimage works in all modes: color, gray, lineart. However, if I scan through the network using net backend, it stops work in lineart mode. Scanimage freezes, until I kill the process. I attached stderr of scanimage --mode Lineart with SANE_DEBUG_NET=9. Process freezes after "[net] sane_read: reading packet length", "scanimage: received signal 15" appears after killall scanimage. Unfortunately I can not check whose problem it is: genesys or net backends. Test backend does not support lineart mode. Has anyone encountered a similar problem? How can I try solve it? Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20120728/07af457c/attachment-0001.html> -------------- next part -------------- [sanei_debug] Setting debug level of net to 9. [net] sane_init: authorize != null, version_code != null [net] sane_init: SANE net backend version 1.0.14 (AF-indep+IPv6) from sane-backends 1.0.22 [net] sane_init: Client has little endian byte order [net] sane_init: searching for config file [net] sane_init: trying to add localhost [net] add_device: adding backend localhost [net] net_avahi_browse_callback: NEW: service 'saned' of type '_sane-port._tcp' in domain 'local' [net] net_avahi_browse_callback: NEW: service 'saned' of type '_sane-port._tcp' in domain 'local' [net] add_device: backend localhost added [net] sane_init: trying to add 192.168.0.176 [net] add_device: adding backend 192.168.0.176 [net] net_avahi_browse_callback: NEW: service 'saned' of type '_sane-port._tcp' in domain 'local' [net] net_avahi_browse_callback: NEW: service 'saned' of type '_sane-port._tcp' in domain 'local' [net] add_device: backend 192.168.0.176 added [net] sane_init: trying to add 192.168.0.187 [net] add_device: adding backend 192.168.0.187 [net] net_avahi_browse_callback: CACHE_EXHAUSTED [net] net_avahi_browse_callback: ALL_FOR_NOW [net] add_device: backend 192.168.0.187 added [net] sane_init: done reading config [net] sane_init: evaluating environment variable SANE_NET_HOSTS [net] sane_init: evaluating environment variable SANE_NET_TIMEOUT [net] sane_init: done [net] sane_open("192.168.0.176:genesys:libusb:002:003") [net] sane_open: host = 192.168.0.176, device = genesys:libusb:002:003 [net] sane_open: device found in list [net] sane_open: device not connected yet... [net] connect_dev: trying to connect to 192.168.0.176 [net] connect_dev: [0] connection succeeded (IPv4) [net] connect_dev: sanei_w_init [net] connect_dev: net_init (user=jean, local version=1.0.3) [net] connect_dev: freeing init reply (status=Success, remote version=1.0.3) [net] connect_dev: done [net] sane_open: net_open [net] net_avahi_resolve_callback: service 'saned' of type '_sane-port._tcp' in domain 'local': [net] thinkpad.local:6566 (fe80::120b:a9ff:fe52:fea0) TXT="protovers=1000003" cookie is 0 is_local: 1 our_own: 0 wide_area: 0 multicast: 1 cached: 1 [net] add_device: adding backend thinkpad.local [net] add_device: backend thinkpad.local added [net] net_avahi_resolve_callback: service 'saned' of type '_sane-port._tcp' in domain 'local': [net] thinkpad.local:6566 (fe80::f2de:f1ff:febb:9f21) TXT="protovers=1000003" cookie is 0 is_local: 1 our_own: 0 wide_area: 0 multicast: 1 cached: 1 [net] add_device: adding backend thinkpad.local [net] add_device: already in list [net] net_avahi_resolve_callback: service 'saned' of type '_sane-port._tcp' in domain 'local': [net] thinkpad.local:6566 (10.212.1.53) TXT="protovers=1000003" cookie is 0 is_local: 1 our_own: 0 wide_area: 0 multicast: 1 cached: 1 [net] add_device: adding backend thinkpad.local [net] add_device: already in list [net] net_avahi_resolve_callback: service 'saned' of type '_sane-port._tcp' in domain 'local': [net] thinkpad.local:6566 (10.212.1.37) TXT="protovers=1000003" cookie is 0 is_local: 1 our_own: 0 wide_area: 0 multicast: 1 cached: 1 [net] add_device: adding backend thinkpad.local [net] add_device: already in list [net] sane_open: getting option descriptors [net] fetch_options: 0x140f960 [net] fetch_options: get_option_descriptors [net] fetch_options: creating 41 local option descriptors [net] fetch_options: copying 41 option descriptors [net] fetch_options: 41 options fetched [net] sane_open: success [net] sane_get_option_descriptor: option 0 [net] sane_control_option: option 0, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 0 [net] sane_control_option: option 0, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 1 [net] sane_get_option_descriptor: option 2 [net] sane_get_option_descriptor: option 3 [net] sane_get_option_descriptor: option 4 [net] sane_get_option_descriptor: option 5 [net] sane_get_option_descriptor: option 6 [net] sane_get_option_descriptor: option 7 [net] sane_get_option_descriptor: option 8 [net] sane_get_option_descriptor: option 9 [net] sane_get_option_descriptor: option 10 [net] sane_get_option_descriptor: option 11 [net] sane_get_option_descriptor: option 12 [net] sane_get_option_descriptor: option 13 [net] sane_get_option_descriptor: option 14 [net] sane_get_option_descriptor: option 15 [net] sane_get_option_descriptor: option 16 [net] sane_get_option_descriptor: option 17 [net] sane_get_option_descriptor: option 18 [net] sane_get_option_descriptor: option 19 [net] sane_get_option_descriptor: option 20 [net] sane_get_option_descriptor: option 21 [net] sane_get_option_descriptor: option 22 [net] sane_get_option_descriptor: option 23 [net] sane_get_option_descriptor: option 24 [net] sane_get_option_descriptor: option 25 [net] sane_get_option_descriptor: option 26 [net] sane_get_option_descriptor: option 27 [net] sane_get_option_descriptor: option 28 [net] sane_get_option_descriptor: option 29 [net] sane_get_option_descriptor: option 30 [net] sane_get_option_descriptor: option 31 [net] sane_get_option_descriptor: option 32 [net] sane_get_option_descriptor: option 33 [net] sane_get_option_descriptor: option 34 [net] sane_get_option_descriptor: option 35 [net] sane_get_option_descriptor: option 36 [net] sane_get_option_descriptor: option 37 [net] sane_get_option_descriptor: option 38 [net] sane_get_option_descriptor: option 39 [net] sane_get_option_descriptor: option 40 [net] sane_control_option: option 10, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 8, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 11, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 9, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 2 [net] sane_get_option_descriptor: option 2 [net] sane_control_option: option 2, action 1 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 6) [net] sane_control_option: done (Success, info 6) [net] sane_get_option_descriptor: option 0 [net] sane_get_option_descriptor: getting option descriptors [net] fetch_options: 0x140f960 [net] fetch_options: 41 option descriptors cached... freeing [net] fetch_options: get_option_descriptors [net] fetch_options: copying 41 option descriptors [net] fetch_options: 41 options fetched [net] sane_control_option: option 0, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 1 [net] sane_get_option_descriptor: option 2 [net] sane_get_option_descriptor: option 3 [net] sane_get_option_descriptor: option 4 [net] sane_get_option_descriptor: option 5 [net] sane_get_option_descriptor: option 6 [net] sane_get_option_descriptor: option 7 [net] sane_get_option_descriptor: option 8 [net] sane_get_option_descriptor: option 9 [net] sane_get_option_descriptor: option 10 [net] sane_get_option_descriptor: option 11 [net] sane_get_option_descriptor: option 12 [net] sane_get_option_descriptor: option 13 [net] sane_get_option_descriptor: option 14 [net] sane_get_option_descriptor: option 15 [net] sane_get_option_descriptor: option 16 [net] sane_get_option_descriptor: option 17 [net] sane_get_option_descriptor: option 18 [net] sane_get_option_descriptor: option 19 [net] sane_get_option_descriptor: option 20 [net] sane_get_option_descriptor: option 21 [net] sane_get_option_descriptor: option 22 [net] sane_get_option_descriptor: option 23 [net] sane_get_option_descriptor: option 24 [net] sane_get_option_descriptor: option 25 [net] sane_get_option_descriptor: option 26 [net] sane_get_option_descriptor: option 27 [net] sane_get_option_descriptor: option 28 [net] sane_get_option_descriptor: option 29 [net] sane_get_option_descriptor: option 30 [net] sane_get_option_descriptor: option 31 [net] sane_get_option_descriptor: option 32 [net] sane_get_option_descriptor: option 33 [net] sane_get_option_descriptor: option 34 [net] sane_get_option_descriptor: option 35 [net] sane_get_option_descriptor: option 36 [net] sane_get_option_descriptor: option 37 [net] sane_get_option_descriptor: option 38 [net] sane_get_option_descriptor: option 39 [net] sane_get_option_descriptor: option 40 [net] sane_control_option: option 10, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 8, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 11, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 9, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_control_option: option 8, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 10 [net] sane_control_option: option 10, action 1 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 4) [net] sane_control_option: done (Success, info 4) [net] sane_control_option: option 9, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_get_option_descriptor: option 11 [net] sane_control_option: option 11, action 1 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 4) [net] sane_control_option: done (Success, info 4) [net] sane_get_option_descriptor: option 6 [net] sane_control_option: option 6, action 0 [net] sane_control_option: remote control option [net] sane_control_option: remote done (Success, info 0) [net] sane_control_option: done (Success, info 0) [net] sane_start [net] sane_start: remote start [net] sane_start: server has little endian byte order [net] sane_start: remote start finished, data at port 36115 [net] sane_start: done (Success) [net] sane_get_parameters [net] sane_get_parameters: remote get parameters [net] sane_get_parameters: returned status Success [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=945 bytes [net] sane_read: 945 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=630 bytes [net] sane_read: 630 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=630 bytes [net] sane_read: 630 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=630 bytes [net] sane_read: 630 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=630 bytes [net] sane_read: 630 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length [net] sane_read: read 4 bytes, 0 from 4 total [net] sane_read: next record length=315 bytes [net] sane_read: 315 bytes read, 0 remaining [net] sane_read: handle=0x140f960, data=0x141a950, max_length=32768, length=0x7fffc382645c [net] sane_read: reading packet length scanimage: received signal 15 scanimage: trying to stop scanner [net] sane_cancel: sending net_cancel [net] do_cancel: 0x140f960 [net] do_cancel: closing data pipe [net] sane_cancel: done [net] sane_read: read failed (Bad file descriptor) [net] sane_read: cancelling read [net] do_cancel: 0x140f960 scanimage: sane_read: Error during device I/O [net] sane_cancel: sending net_cancel [net] do_cancel: 0x140f960 [net] sane_cancel: done [net] sane_close: handle 0x140f960 [net] sane_close: removing cached option descriptors [net] sane_close: removing local option descriptors [net] sane_close: net_close [net] sane_close: done [net] sane_exit: exiting [net] net_avahi_cleanup: stopping thread [net] net_avahi_cleanup: done [net] sane_exit: closing dev 0x7f2b00000d60, ctl=-1 [net] sane_exit: closing dev 0x1412e00, ctl=-1 [net] sane_exit: closing dev 0x1412080, ctl=6 [net] sane_exit: closing dev 0x1413090, ctl=-1 [net] sane_exit: finished.
