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[Bungaman <241781@xxxxxxxxxxxxxxxxxx>]

Same issue for me, also on photosmart 7450.  I managed to get one test
page out of the printer and that's it.  What is happening is that the
printer disappears from the usb channel.  Why it does that I do not know
but the computer really cannot communicate to the printer anymore when
it is gone.  I tried to plug it in on different usb ports but that does
not resolve anything.

One other strange thing is that it always says "Pen cleaning in
progress" just after switching it on and that status message does not go
away.  Note that I did install new cartridges with all these issues and
was able to get 1 test page out which printed nicely.  Another thing is
the cartridge for color always indicates as not installed althoug it is
and with the test page, it used the colors.

I kicked out Windows but a bit too soon I believe... Desparate for a
fix...

me@Lapper:~$ lsusb
Bus 002 Device 041: ID 03f0:b802 Hewlett-Packard PhotoSmart 7400 series
Bus 002 Device 003: ID 046d:c03d Logitech, Inc. M-BT96a Pilot Optical Mouse
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 13d3:5710 IMC Networks UVC VGA Webcam
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
me@Lapper:~$ lsusb
Bus 002 Device 003: ID 046d:c03d Logitech, Inc. M-BT96a Pilot Optical Mouse
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 13d3:5710 IMC Networks UVC VGA Webcam
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

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https://bugs.launchpad.net/bugs/241781

Title:
  hp photosmart 7450 communication problems.

Status in HP Linux Imaging and Printing:
  New
Status in hplip package in Ubuntu:
  Incomplete

Bug description:
  My HP photosmart 7450 printer has been showing some communication problems since using Hardy.  Prior to this, I've been running Debian stable on exactly the same hardware without any printer problems.  The symptoms are:
  printer is detected as photosmart 7400 & appears to install correctly.  I can sometimes initially print one or two pages, then it locks up completely, I get a pop-up notice on the top panel about printer supplies low (although it isn't).  At this point, the printer firmware appears to have hung - it doesn't respond to front-panel button presses & the only way to get it to respond is to pull the power supply for a few seconds.  On reconnecting, it sometimes prints, sometimes doesn't.  
  I've tried uninstalling the hplip package and installing the latest version (2.8.5) from the hp website.  It didn't make any difference, the symptoms are unchanged.  

  It looks like there's another user with the same problem:
  http://ubuntuforums.org/showthread.php?t=809469&highlight=photosmart+7450 

  Following the advice from the debugging printer problems page:
  mike@badger:~$ lsmod |grep usb
  usb_storage            73664  0 
  libusual               19108  1 usb_storage
  usblp                  15872  0 
  usbhid                 31872  0 
  hid                    38784  1 usbhid
  usbcore               146028  8 usb_storage,libusual,usblp,usbhid,ehci_hcd,uhci_hcd
  scsi_mod              151436  5 usb_storage,sg,sr_mod,sd_mod,libata

  mike@badger:~$ tail -f /var/log/messages
  Jun 20 20:24:37 badger kernel: [  476.217222] scsi 2:0:0:0: [sdb] Sense not available.
  Jun 20 20:24:37 badger kernel: [  476.217230] scsi 2:0:0:0: [sdb] Write Protect is off
  Jun 20 20:24:37 badger kernel: [  476.324885] usb 4-1: new full speed USB device using uhci_hcd and address 3
  Jun 20 20:24:38 badger kernel: [  476.888758] usb 4-1: new full speed USB device using uhci_hcd and address 4
  Jun 20 20:24:39 badger kernel: [  477.456648] usb 4-1: new full speed USB device using uhci_hcd and address 5
  Jun 20 20:24:39 badger kernel: [  477.976533] usb 4-1: new full speed USB device using uhci_hcd and address 6
  Jun 20 20:37:20 badger -- MARK --
  Jun 20 20:57:20 badger -- MARK --
  Jun 20 21:17:20 badger -- MARK --
  Jun 20 21:37:20 badger -- MARK --
  Jun 20 21:41:19 badger kernel: [ 5077.147105] usb 4-1: new full speed USB device using uhci_hcd and address 7
  Jun 20 21:41:19 badger kernel: [ 5077.341241] usb 4-1: configuration #1 chosen from 1 choice
  Jun 20 21:41:19 badger kernel: [ 5077.349158] usblp0: USB Bidirectional printer dev 7 if 0 alt 0 proto 2 vid 0x03F0 pid 0xB802
  Jun 20 21:41:19 badger kernel: [ 5077.363071] scsi3 : SCSI emulation for USB Mass Storage devices
  Jun 20 21:41:24 badger kernel: [ 5082.381468] scsi 3:0:0:0: Direct-Access     HP       Photosmart 7400  1.00 PQ: 0 ANSI: 2
  Jun 20 21:41:24 badger kernel: [ 5082.398537] sd 3:0:0:0: [sdb] Attached SCSI removable disk
  Jun 20 21:41:24 badger kernel: [ 5082.398592] sd 3:0:0:0: Attached scsi generic sg3 type 0
  Jun 20 21:57:20 badger -- MARK --
  Jun 20 22:17:20 badger -- MARK --
  Jun 20 22:37:20 badger -- MARK --

  mike@badger:~$ lpinfo -v
  network socket
  network beh
  direct hpfax
  direct hal:///org/freedesktop/Hal/devices/usb_device_3f0_b802_CN4B82V0WBUJ_if0_printer_CN4B82V0WBUJ
  direct usb://HP/Photosmart%207400%20series?serial=CN4B82V0WBUJ
  direct hp:/usb/Photosmart_7400_series?serial=CN4B82V0WBUJ
  network http
  network ipp
  network lpd
  direct parallel:/dev/lp0
  file cups-pdf:/
  direct scsi
  network smb
  mike@badger:~$

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