Printer becomes offline

Rodrigo Castro rodsc at terra.com.br
Tue May 1 11:51:03 PDT 2007


I have cups 1.2.6, udev 104, a HP LaserJet 1022 printer and have a very strange problem to make it work. Plugging the printer in is displayed in lsusb, but lpinfo is very unstable, sometimes it displays the printer, sometimes not. For example:

1. Plug the printer in.
2. Run lpinfo -v (printer is there)
3. Open gnome-cups-add
4. Add the printer
5. Run lpinfo -v again (printer is NO LONGER there)

These steps are reproducible all the time. lsusb lists the device all the time, as you can see below, but I can't print.

Bus 001 Device 023: ID 03f0:2c17 Hewlett-Packard
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x03f0 Hewlett-Packard
  idProduct          0x2c17
  bcdDevice            1.00
  iManufacturer           1 Hewlett-Packard
  iProduct                2 HP LaserJet 1022
  iSerial                 3 FX10LFK
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower               98mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         7 Printer
      bInterfaceSubClass      1 Printer
      bInterfaceProtocol      2 Bidirectional
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1

Checking dmesg, I can see many error messages during my tests:

usb 1-6: new high speed USB device using ehci_hcd and address 21
usb 1-6: device descriptor read/64, error -71
usb 1-6: device descriptor read/all, error -71
usb 1-6: new high speed USB device using ehci_hcd and address 22
usb 1-6: device descriptor read/all, error -71
usb 1-6: new high speed USB device using ehci_hcd and address 23
usb 1-6: configuration #1 chosen from 1 choice
drivers/usb/class/usblp.c: usblp0: USB Bidirectional printer dev 23 if 0 alt 0 proto 2 vid 0x03F0 pid 0x2C17

There are other error messages like "error reading configuration", but I have lost them as my system does not run syslogd. The error message below is very frequent too:

drivers/usb/class/usblp.c: usblp0: off-line

Do you have any idea of how to solve this problem?

Thanks in advance,
Rodrigo






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