Please note that the above was on a network connection. Out of curiosity I also tried to scan while USB connected (connected simultaneously with network) It also fails but with a slightly different behaviour: first adf sheet is loaded and then hp-scan --adf halts without any error. I have to manually stop it. I also noticed that while USB connected a Fax device is available through device manager, which was not while network connected. $ hp-scan --adf HP Linux Imaging and Printing System (ver. 3.11.10) Scan Utility ver. 2.2 Copyright (c) 2001-9 Hewlett-Packard Development Company, LP This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details. ----------------- | SELECT DEVICE | ----------------- Num Scan device URI -------- ---------------------------------------------------- 0 hpaio:/net/Officejet_7500_E910?zc=HPA9B9D1 1 hpaio:/usb/Officejet_7500_E910?serial=MY16H210P105JB Enter number 0...1 for device (q=quit) ?1 warning: No destinations specified. Adding 'file' destination by default. Using device hpaio:/usb/Officejet_7500_E910?serial=MY16H210P105JB Opening connection to device... Resolution: 300dpi Mode: gray Compression: JPEG Scan area (mm): Top left (x,y): (0.000000mm, 0.000000mm) Bottom right (x,y): (215.900009mm, 355.600006mm) Width: 215.900009mm Height: 355.600006mm Destination(s): file Output file: warning: File destination enabled with no output file specified. Setting output format to PDF for ADF mode. warning: Defaulting to '/home/joao/hpscan001.pdf'. Warming up... Page 1: Scanning... ^Z [1]+ Stopped hp-scan --adf /var/log/messages: Oct 4 12:32:15 eeeboxpc python: hp-scan[2456]: warning: No destinations specified. Adding 'file' destination by default. Oct 4 12:32:18 eeeboxpc python: hp-scan[2456]: warning: File destination enabled with no output file specified. Oct 4 12:32:18 eeeboxpc python: hp-scan[2456]: warning: Defaulting to '/home/joao/hpscan001.pdf'. /var/log/syslog: Oct 4 12:32:15 eeeboxpc python: hp-scan[2456]: warning: No destinations specified. Adding 'file' destination by default. Oct 4 12:32:18 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:32:18 eeeboxpc python: hp-scan[2456]: warning: File destination enabled with no output file specified. Oct 4 12:32:18 eeeboxpc python: hp-scan[2456]: warning: Defaulting to '/home/joao/hpscan001.pdf'. Oct 4 12:32:18 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:32:19 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:32:19 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:32:19 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:32:19 eeeboxpc python: scan/sane/http.c 344: invalid http_status=404 Oct 4 12:32:19 eeeboxpc python: scan/sane/http.c 348: dumping len=259 Oct 4 12:32:20 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=1 Oct 4 12:33:10 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:33:10 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 Oct 4 12:34:00 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:34:00 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 Oct 4 12:34:50 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:34:50 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 Oct 4 12:35:40 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:35:40 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 Oct 4 12:36:30 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:36:30 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 Oct 4 12:37:20 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:37:20 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50 On a second try I also disconneted network connection and removed network queue. Same behaviour: /var/log/messages: Oct 4 12:48:04 eeeboxpc python: hp-scan[2835]: warning: No destinations specified. Adding 'file' destination by default. Oct 4 12:48:07 eeeboxpc python: hp-scan[2835]: warning: File destination enabled with no output file specified. Oct 4 12:48:07 eeeboxpc python: hp-scan[2835]: warning: Defaulting to '/home/joao/hpscan001.pdf'. /var/log/syslog: Oct 4 12:48:04 eeeboxpc python: hp-scan[2835]: warning: No destinations specified. Adding 'file' destination by default. Oct 4 12:48:07 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:48:07 eeeboxpc python: hp-scan[2835]: warning: File destination enabled with no output file specified. Oct 4 12:48:07 eeeboxpc python: hp-scan[2835]: warning: Defaulting to '/home/joao/hpscan001.pdf'. Oct 4 12:48:07 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:48:07 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:48:07 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:48:07 eeeboxpc python: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN Oct 4 12:48:08 eeeboxpc python: scan/sane/http.c 344: invalid http_status=404 Oct 4 12:48:08 eeeboxpc python: scan/sane/http.c 348: dumping len=259 Oct 4 12:48:09 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=1 Oct 4 12:48:59 eeeboxpc python: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_7500_E910?serial=MY16H210P105JB: 50 second io timeout Oct 4 12:48:59 eeeboxpc python: scan/sane/http.c 188: timeout reading data sec_timeout=50