Hi, When I do sane-find-scanner as root, it detects my scanner: ?found SCSI processor "HP C2520A 3503" at /dev/sg0 But when I try scanimage -L as root, it pauses for a long time, then the scanner is set offline and sane-find-scanner no longer detects it. I tried the same hardware and connections in Windows 98 and it worked.
Here is my system information: uname -a: Linux hotrod 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux The SCSI adapter is an ACARD AEC-6712TS (PCI Ultra SCSI), with an internal 50 pin connector (unused), and external high density 50 pin connector (used). Detected as "Artop Electronic Corp AEC6712S SCSI (rev 08)", and it uses the Linux "atp870u" driver. The card documentation claims it does "automatic" SCSI termination. This is what the kernel prints on boot: [ ? ?0.861732] atp870u 0000:00:0c.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ ? ?0.861739] atp870u: use 32bit DMA mask. [ ? ?0.861745] ? ?ACARD AEC-671X PCI Ultra/W SCSI-2/3 Host Adapter: 0 IO:c000, IRQ:16. ... [ ? ?0.981966] ? ? ? ? ?ID: ?5 ?HP ? ? ?C2520A ? ? ? ? ?3503 [ ? ?0.981966] ? ? ? ? ?ID: ?7 ?Host Adapter The scanner is an HP ScanJet 4c, SCSI ID 5, with termination set, connected via a high density 50 pin to Centronics 50 pin cable. I tried booting with the scanner SCSI termination set either way, but it made no difference. Here is the output from scanimage -L: SANE_DEBUG_HP=255 scanimage -d /dev/sg0 -vvvvv -L [sanei_debug] Setting debug level of hp to 255. [hp] sane_init called [hp] hp_init: global.is_up = 1 [hp] sane_init will finish with Success [hp] sane_get_devices called [hp] hp_read_config: hp backend v1.06/$Revision$ starts reading config file [hp] hp_read_config: processing line <scsi HP> [hp] hp_read_config: processing line <# Uncomment the following if you have "Error during device I/O" on SCSI> [hp] hp_read_config: processing line <# ? option dumb-read> [hp] hp_read_config: processing line <#> [hp] hp_read_config: processing line <# The usual place for a SCSI-scanner on Linux> [hp] hp_read_config: processing line </dev/scanner> [hp] hp_attach_matching_devices: attach matching scsi HP [hp] hp_attach: "/dev/sg0" [hp] sanei_hp_device_info_get: searching /dev/sg0 [hp] sanei_hp_device_info_get: check /dev/sg0 [hp] hp_get_dev: New device /dev/sg0, connect-scsi, scsi-request=1 [hp] sanei_hp_device_new: /dev/sg0 [hp] sanei_hp_device_info_get: searching /dev/sg0 [hp] sanei_hp_device_info_get: check /dev/sg0 [hp] sanei_hp_device_info_get: searching /dev/sg0 [hp] sanei_hp_device_info_get: check /dev/sg0 [hp] hp_GetOpenDevice: device /dev/sg0 not open [hp] scsi_inquire: sending INQUIRE [hp] vendor=HP ? ? ?, model=C2520A ? ? ? ? ?, rev=3503 [hp] scsi_new: sending TEST_UNIT_READY [hp] hp_AddOpenDevice: /dev/sg0 should not be kept open [hp] scsi_flush: writing 2 bytes: [hp] ?0x0000 ?1B 45 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?.E [hp] sanei_hp_device_info_get: searching /dev/sg0 [hp] sanei_hp_device_info_get: check /dev/sg0 ...pauses here for a long time... [hp] sanei_hp_device_new: SCL reset failed [hp] scsi_close: closing fd 5 [hp] sanei_hp_device_info_get: searching /dev/sg0 [hp] sanei_hp_device_info_get: check /dev/sg0 [hp] scsi_close: really closed [hp] hp_RemoveOpenFd: 5 not removed ... I cut some text here which didn't seem relevant ... [hp] hp_read_config: reset to default config [hp] sane_get_devices will finish with Success No scanners were identified. If you were expecting something different, check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages). [hp] sane_exit called [hp] hp_destroy: global.is_up = 0 [hp] sane_exit will finish After running the scanimage -L, I see this in dmesg: [ ?758.240030] ?atp870u: abort Channel = 0 [ ?758.240036] working=1 last_cmd=5 ?quhdu=7 quendu=7 ?r 0= 6 r 1=2c r 2=cf r 3= a r 4= 0 r 5= 0 r 6= 0 r 7= 2 r 8= 0 r 9= 0 r a= 0 r b= 0 r c= 0 r d= 0 r e= 0 r f= 0 r10=36 r11=20 r12= 0 r13= 0 r14= 2 r15=25 r16=80 r17=16 r1c=a0 r1f=37 in_snd= 0 ?d00= 1 d02= 8 [ ?758.240091] ?que cdb= ? a ? 0 ? 0 ? 0 ? 2 ? 0 ?last_lenu= 2 atp870u: abort Channel = 0 [ ?768.240040] working=1 last_cmd=5 ?quhdu=7 quendu=8 ?r 0= 6 r 1=2c r 2=cf r 3= a r 4= 0 r 5= 0 r 6= 0 r 7= 2 r 8= 0 r 9= 0 r a= 0 r b= 0 r c= 0 r d= 0 r e= 0 r f= 0 r10=36 r11=20 r12= 0 r13= 0 r14= 2 r15=25 r16=80 r17=16 r1c=a0 r1f=37 in_snd= 0 ?d00= 1 d02= 8 [ ?768.240108] ?que cdb= ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ?last_lenu= 2 [ ?768.240133] scsi 0:0:5:0: Device offlined - not ready after error recovery One thing I found interesting was the output of lsscsi -lll (this output is prior to the device being offlined, so state=running rather than state=offline). Rather than putting /dev/sg0 for the dev name it simply puts "-". I don't know if this is related to the problem at all or simply a quirk of lsscsi, but just in case: [0:0:5:0] process HP C2520A 3503 - device_blocked=0 iocounterbits=32 iodone_cnt=0x3 ioerr_cnt=0x0 iorequest_cnt=0x3 queue_depth=1 queue_type=none scsi_level=3 state=running timeout=0 type=3 Since I know that the card, cable, and scanner work, I figure it's either a problem in sane or with the SCSI card support under Linux (or maybe some combination effect?), but I'm not sure how to tell. I also noticed a similar-looking problem from 2006: http://lists.alioth.debian.org/pipermail/sane-devel/2006-August/017549.html Thanks a lot for any suggestions or ideas, Jeff
