HP OfficeJet Pro 8500A freezes after scanning 2-3 gray pages from flatbed or 1 color one

Installed HP OfficeJet Pro 8500A and the device consistently locks up when scanning three or more gray pages from the flatbed (not document feeder). The AIO scans the image/page, but hangs after scanning, but before displaying the image on the screen. The AIO displays "Scanning" on its screen.

I replicated this using XSane Image Scanner and gscan2pdf (which uses xsane) -- this is easier to replicate using gscan2pdf b/c all of the images are right there in the application, not all over your screen. To replicate, open
gscan2pdf, make sure that you are scanning gray @ 100dpi, and scan one page, then another one, and if the AIO did not lock up yet, scan another one.

See below for output from my Syslog right around when the event occurred. This time the lockup occurred using XSane Image Scanner while scanning one page in color:
Mar 10 14:02:22 mainpc kernel: [325335.442704] usb 1-4: usbfs: interface 1 claimed by usblp while 'usb' sets config #1
Mar 10 14:02:22 mainpc kernel: [325335.442733] usb 1-4: usbfs: interface 1 claimed by usblp while 'usb' sets config #1
Mar 10 14:08:48 mainpc xsane: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN
Mar 10 14:08:48 mainpc kernel: [325721.346222] usblp0: removed
Mar 10 14:09:06 mainpc xsane: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN
Mar 10 14:09:13 mainpc xsane: last message repeated 2 times
Mar 10 14:09:13 mainpc xsane: sane_hpaio_cancel: already cancelled!
Mar 10 14:09:13 mainpc xsane: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN
Mar 10 14:09:38 mainpc xsane: last message repeated 3 times
Mar 10 14:09:38 mainpc xsane: scan/sane/http.c 344: invalid http_status=404
Mar 10 14:09:38 mainpc xsane: scan/sane/http.c 348: dumping len=263
Mar 10 14:09:39 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=1
Mar 10 14:10:29 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:10:29 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:11:19 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:11:19 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:12:09 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:12:09 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:12:59 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:12:59 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:13:49 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:13:49 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:14:39 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:14:39 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:15:29 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:15:29 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:16:19 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:16:19 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:17:01 mainpc CRON[27108]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Mar 10 14:17:09 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:17:09 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:17:59 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:17:59 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:18:49 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:18:49 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:19:39 mainpc xsane: io/hpmud/musb.c 1460: unable to read data hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN: 50 second io timeout
Mar 10 14:19:39 mainpc xsane: scan/sane/http.c 188: timeout reading data sec_timeout=50
Mar 10 14:19:39 mainpc kernel: [326372.589271] xsane[27068]: segfault at bec43860 ip 00f502bd sp bfc437e0 error 6 in libsane-hpaio.so.1.0.0[f37000+23000]
Mar 10 14:35:34 mainpc NetworkManager: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Mar 10 14:45:46 mainpc kernel: [327938.901681] usb 1-4: USB disconnect, address 10
Mar 10 14:45:46 mainpc kernel: [327938.933508] usblp1: removed
Mar 10 14:45:46 mainpc udev-configure-printer: remove /devices/pci0000:00/0000:00:0b.1/usb1/1-4
Mar 10 14:45:46 mainpc udev-configure-printer: URI of print queue: usb://Linux%20Foundation/1.1%20root%20hub?serial=0000:00:0b.0, normalized: linux foundation 1 1 root hub serial 0000 00 0b 0
Mar 10 14:45:46 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: URI of print queue: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: Queue ipp://localhost:631/printers/HP-Officejet-Pro-8500-A910-FAX has matching device URI
Mar 10 14:45:46 mainpc udev-configure-printer: Disabled printer ipp://localhost:631/printers/HP-Officejet-Pro-8500-A910-FAX as the corresponding device was unplugged or turned off
Mar 10 14:45:46 mainpc udev-configure-printer: URI of print queue: socket://192.168.0.7:9100, normalized: socket 192 168 0 7 9100
Mar 10 14:45:46 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: URI of print queue: hp:/net/Officejet_Pro_8500_A910?zc=HPOccam, normalized: net officejet pro 8500 a910 zc hpoccam
Mar 10 14:45:46 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: URI of print queue: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:45:46 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:46:15 mainpc kernel: [327968.128051] usb 1-4: new high speed USB device using ehci_hcd and address 11
Mar 10 14:46:15 mainpc kernel: [327968.262123] usb 1-4: configuration #1 chosen from 1 choice
Mar 10 14:46:15 mainpc kernel: [327968.263717] usblp0: USB Bidirectional printer dev 11 if 1 alt 0 proto 2 vid 0x03F0 pid 0x5312
Mar 10 14:46:15 mainpc kernel: [327968.273029] scsi15 : SCSI emulation for USB Mass Storage devices
Mar 10 14:46:15 mainpc kernel: [327968.275359] usb-storage: device found at 11
Mar 10 14:46:15 mainpc kernel: [327968.275364] usb-storage: waiting for device to settle before scanning
Mar 10 14:46:15 mainpc kernel: [327968.276409] usblp1: USB Bidirectional printer dev 11 if 3 alt 0 proto 2 vid 0x03F0 pid 0x5312
Mar 10 14:46:15 mainpc udev-configure-printer: add /devices/pci0000:00/0000:00:0b.1/usb1/1-4/1-4:1.1
Mar 10 14:46:15 mainpc udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:0b.1/usb1/1-4
Mar 10 14:46:15 mainpc udev-configure-printer: Device vendor/product is 03F0:5312
Mar 10 14:46:15 mainpc udev-configure-printer: add /devices/pci0000:00/0000:00:0b.1/usb1/1-4/1-4:1.3
Mar 10 14:46:15 mainpc udev-configure-printer: add /devices/pci0000:00/0000:00:0b.1/usb1/1-4/1-4:1.1/usb/lp0
Mar 10 14:46:15 mainpc udev-configure-printer: failed to claim interface
Mar 10 14:46:15 mainpc udev-configure-printer: failed to claim interface
Mar 10 14:46:15 mainpc udev-configure-printer: invalid or missing IEEE 1284 Device ID
Mar 10 14:46:15 mainpc udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:0b.1/usb1/1-4
Mar 10 14:46:15 mainpc udev-configure-printer: Device vendor/product is 03F0:5312
Mar 10 14:46:15 mainpc udev-configure-printer: failed to claim interface
Mar 10 14:46:15 mainpc udev-configure-printer: failed to claim interface
Mar 10 14:46:15 mainpc udev-configure-printer: invalid or missing IEEE 1284 Device ID
Mar 10 14:46:15 mainpc udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:0b.1/usb1/1-4
Mar 10 14:46:15 mainpc udev-configure-printer: MFG:HP MDL:Officejet Pro 8500 A910 SERN:CN09RAK1NN serial:CN09RAK1NN
Mar 10 14:46:15 mainpc udev-configure-printer: add /devices/pci0000:00/0000:00:0b.1/usb1/1-4/1-4:1.3/usb/lp1
Mar 10 14:46:16 mainpc kernel: [327969.394224] usb 1-4: usbfs: interface 1 claimed by usblp while 'usb' sets config #1
Mar 10 14:46:16 mainpc kernel: [327969.394277] usb 1-4: usbfs: interface 1 claimed by usblp while 'usb' sets config #1
Mar 10 14:46:18 mainpc udev-configure-printer: SERN fields match
Mar 10 14:46:18 mainpc udev-configure-printer: URI match: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN
Mar 10 14:46:18 mainpc udev-configure-printer: SERN fields match
Mar 10 14:46:18 mainpc udev-configure-printer: URI match: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN
Mar 10 14:46:18 mainpc udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:0b.1/usb1/1-4
Mar 10 14:46:18 mainpc udev-configure-printer: Consider also queues with "/usb/lp0" or "/usblp0" in their URIs as matching
Mar 10 14:46:18 mainpc udev-configure-printer: URI of print queue: usb://Linux%20Foundation/1.1%20root%20hub?serial=0000:00:0b.0, normalized: linux foundation 1 1 root hub serial 0000 00 0b 0
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of print queue: usb://HP/Officejet%20Pro%208500%20A910%20FAX?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 fax serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of print queue: socket://192.168.0.7:9100, normalized: socket 192 168 0 7 9100
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of print queue: hp:/net/Officejet_Pro_8500_A910?zc=HPOccam, normalized: net officejet pro 8500 a910 zc hpoccam
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of print queue: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: usb://HP/Officejet%20Pro%208500%20A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: Queue ipp://localhost:631/printers/Officejet_Pro_8500_A910-USB has matching device URI
Mar 10 14:46:18 mainpc udev-configure-printer: Re-enabled printer ipp://localhost:631/printers/Officejet_Pro_8500_A910-USB
Mar 10 14:46:18 mainpc udev-configure-printer: URI of detected printer: hp:/usb/Officejet_Pro_8500_A910?serial=CN09RAK1NN, normalized: officejet pro 8500 a910 serial cn09rak1nn
Mar 10 14:46:18 mainpc udev-configure-printer: Queue ipp://localhost:631/printers/Officejet_Pro_8500_A910-USB has matching device URI
Mar 10 14:46:18 mainpc udev-configure-printer: Re-enabled printer ipp://localhost:631/printers/Officejet_Pro_8500_A910-USB
Mar 10 14:46:20 mainpc kernel: [327973.272191] usb-storage: device scan complete
Mar 10 14:46:20 mainpc kernel: [327973.273915] scsi 15:0:0:0: Direct-Access HP Officejet Pro 85 1.00 PQ: 0 ANSI: 5
Mar 10 14:46:20 mainpc kernel: [327973.280298] sd 15:0:0:0: Attached scsi generic sg4 type 0
Mar 10 14:46:20 mainpc kernel: [327973.288198] sd 15:0:0:0: [sdc] Attached SCSI removable disk
Mar 10 14:46:55 mainpc ntpd[1356]: kernel time sync status change 6001
Mar 10 15:03:58 mainpc ntpd[1356]: kernel time sync status change 2001
Mar 10 15:17:01 mainpc CRON[27386]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Mar 10 15:45:16 mainpc xsane: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN
Mar 10 15:45:29 mainpc xsane: last message repeated 3 times
Mar 10 15:45:29 mainpc xsane: sane_hpaio_cancel: already cancelled!
Mar 10 15:45:29 mainpc xsane: io/hpmud/hpmud.c 214: io/hpmud/hpmud.c: service_to_channel(): sn=HP-LEDM-SCAN

Please let me know if you need any more information.