I am having this problem too on 2.6.32-20-generic HO office jet G55 see Power off power on messages at bottom of this comment Apr 14 13:37:28 HPlaptop1 ddclient[1092]: SUCCESS: updating ... Apr 14 13:37:53 HPlaptop1 kernel: [ 349.931454] usb 1-2.2: USB disconnect, address 11 Apr 14 13:37:53 HPlaptop1 kernel: [ 349.938383] usblp0: removed Apr 14 13:37:53 HPlaptop1 udev-configure-printer: remove /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 13:37:58 HPlaptop1 kernel: [ 354.097702] usb 1-2.2: new full speed USB device using uhci_hcd and address 12 Apr 14 13:37:58 HPlaptop1 kernel: [ 354.240751] usb 1-2.2: configuration #1 chosen from 1 choice Apr 14 13:37:58 HPlaptop1 kernel: [ 354.249900] usblp0: USB Bidirectional printer dev 12 if 0 alt 0 proto 3 vid 0x03F0 pid 0x0011 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: add /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2/1-2.2:1.0 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: Device vendor/product is 03F0:0011 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: failed to claim interface Apr 14 13:37:58 HPlaptop1 udev-configure-printer: invalid or missing IEEE 1284 Device ID Apr 14 13:37:58 HPlaptop1 udev-configure-printer: add /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2/1-2.2:1.0/usb/lp0 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 13:37:58 HPlaptop1 udev-configure-printer: MFG:Hewlett-Packard MDL:OfficeJet G55 SERN:SGE08EGCYGVL serial:SGE08EGCYGVL Apr 14 13:37:59 HPlaptop1 hp[2322]: io/hpmud/pp.c 627: unable to read device-id ret=-1 Apr 14 13:38:00 HPlaptop1 python: io/hpmud/pp.c 627: unable to read device-id ret=-1 Apr 14 13:38:01 HPlaptop1 udev-configure-printer: SERN fields match Apr 14 13:38:01 HPlaptop1 udev-configure-printer: URI match: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL Apr 14 13:38:01 HPlaptop1 udev-configure-printer: About to add queue for usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL Apr 14 13:38:01 HPlaptop1 udev-add-printer: add_queue: URIs=['usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL'] Apr 14 13:38:59 HPlaptop1 udev-add-printer: PPD: drv:///hpijs.drv/hp-officejet_g55-hpijs.ppd; Status: 0 Apr 14 13:40:04 HPlaptop1 AptDaemon: INFO: Quiting due to inactivity Apr 14 13:40:04 HPlaptop1 AptDaemon: INFO: Shutdown was requested Apr 14 13:44:17 HPlaptop1 kernel: [ 733.232981] Inbound IN=hso0 OUT= MAC= SRC=222.208.183.218 DST=89.194.74.158 LEN=40 TOS=0x00 PREC=0x00 TTL=113 ID=256 DF PROTO=TCP SPT=12200 DPT=8000 WINDOW=8192 RES=0x00 SYN URGP=0 power off then power on Apr 14 14:16:48 HPlaptop1 kernel: [ 2684.428536] usb 1-2.2: USB disconnect, address 12 Apr 14 14:16:48 HPlaptop1 kernel: [ 2684.429293] usblp0: removed Apr 14 14:16:50 HPlaptop1 udev-configure-printer: remove /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 14:16:50 HPlaptop1 udev-configure-printer: URI of print queue: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL, normalized: officejet g55 serial sge08egcygvl Apr 14 14:16:50 HPlaptop1 udev-configure-printer: URI of detected printer: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL, normalized: officejet g55 serial sge08egcygvl Apr 14 14:16:50 HPlaptop1 udev-configure-printer: Queue ipp://localhost:631/printers/OfficeJet-G55 has matching device URI Apr 14 14:16:50 HPlaptop1 udev-configure-printer: Disabled printer ipp://localhost:631/printers/OfficeJet-G55 as the corresponding device was unplugged or turned off Apr 14 14:17:01 HPlaptop1 CRON[3840]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly) POWER ON Apr 14 14:17:21 HPlaptop1 kernel: [ 2717.773974] usb 1-2.2: new full speed USB device using uhci_hcd and address 13 Apr 14 14:17:21 HPlaptop1 kernel: [ 2717.918260] usb 1-2.2: configuration #1 chosen from 1 choice Apr 14 14:17:21 HPlaptop1 kernel: [ 2717.930984] usblp0: USB Bidirectional printer dev 13 if 0 alt 0 proto 3 vid 0x03F0 pid 0x0011 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: add /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2/1-2.2:1.0 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: Device vendor/product is 03F0:0011 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: failed to claim interface Apr 14 14:17:21 HPlaptop1 udev-configure-printer: invalid or missing IEEE 1284 Device ID Apr 14 14:17:21 HPlaptop1 udev-configure-printer: add /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2/1-2.2:1.0/usb/lp0 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: parent devpath is /devices/pci0000:00/0000:00:07.2/usb1/1-2/1-2.2 Apr 14 14:17:21 HPlaptop1 udev-configure-printer: MFG:Hewlett-Packard MDL:OfficeJet G55 SERN:SGE08EGCYGVL serial:SGE08EGCYGVL Apr 14 14:17:24 HPlaptop1 hp[3871]: io/hpmud/pp.c 627: unable to read device-id ret=-1 Apr 14 14:17:25 HPlaptop1 udev-configure-printer: SERN fields match Apr 14 14:17:25 HPlaptop1 udev-configure-printer: URI match: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL Apr 14 14:17:25 HPlaptop1 udev-configure-printer: Consider also queues with "/usb/lp0" or "/usblp0" in their URIs as matching Apr 14 14:17:25 HPlaptop1 udev-configure-printer: URI of print queue: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL, normalized: officejet g55 serial sge08egcygvl Apr 14 14:17:25 HPlaptop1 udev-configure-printer: URI of detected printer: usb://HP/OfficeJet%20G55?serial=SGE08EGCYGVL, normalized: officejet g55 serial sge08egcygvl Apr 14 14:17:25 HPlaptop1 udev-configure-printer: Queue ipp://localhost:631/printers/OfficeJet-G55 has matching device URI Apr 14 14:17:25 HPlaptop1 udev-configure-printer: Re-enabled printer ipp://localhost:631/printers/OfficeJet-G55