[sane-devel] Epson GT-7400U not detected

Julian Gough gough at gsc.riken.jp
Tue Dec 30 22:36:35 GMT 2003


Dear list,

I have just purchased an Epson scanner, model GT-7400U with the express
purpose of getting it to work under Linux. I had hoped it would work
since Epson was recommended and this is not a particularly advanced
model (1200dpi CCD 16bit in/out USB2.0 [EPSON Scan] PRINT image matching
II). I cannot work out what is the equivalent non-Japanese model number
I'm afraid.

I have RedHat with: sane-frontends-1.0.9-2, sane-backends-1.0.9-5.1,
and  iscan-1.5.2-1. Running xsane reports "no devices available", iscan
reports "Could not send command to scanner", and scanimage -L reports
"No scanners were identified".

The outputs of lsusb and /proc are listed below. sane-find-scanner
yields one of these:
found USB scanner (vendor=0x04b8, product=0x0120) at /dev/usb/scanner0
found USB scanner (vendor=0x04b8, product=0x0120) at libusb:001:004
found USB scanner (vendor=0x04b8 [EPSON], product=0x0120 [EPSON
Scanner]) at libusb:001:005

... depending on how I configure /etc/modules.conf and
/etc/sane.d/epson.conf 

I am assuming this is not a supported scanner, however I would like to
try using one of the Epson drivers anyway to see if I can get it to
work. Is this reasonable? The documentation suggests that this is a
possibility, but if I follow the documentation I still get the same
problem: scanner not detected.

I don't think I can return this to the shop, so I would be very very
grateful for any advice on how to try to get this functioning.






[root at invigiator gough]# cat /proc/bus/usb/devices
T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=ec00
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=e800
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 0.00
S:  Product=USB UHCI Root Hub
S:  SerialNumber=e400
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=255ms
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.04
S:  Manufacturer=Linux 2.4.20-24.9 ehci-hcd
S:  Product=Intel Corp. 82801DB USB EHCI Controller
S:  SerialNumber=00:1d.7
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=256ms
T:  Bus=01 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#=  5 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs=  1
P:  Vendor=04b8 ProdID=0120 Rev= 1.10
S:  Manufacturer=EPSON
S:  Product=EPSON Scanner
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=4096ms
[root at invigiator gough]# cat /proc/bus/usb/drivers
         usbdevfs
         hub
 96-111: hiddev
         hid
[root at invigiator gough]# sane-find-scanner
 
  # No SCSI scanners found. If you expected something different, make
sure that
  # you have loaded a SCSI driver for your SCSI adapter.
  # Also you need support for SCSI Generic (sg) in your operating
system.
  # If using Linux, try "modprobe sg".
 
found USB scanner (vendor=0x04b8, product=0x0120) at libusb:001:004
  # A USB device was detected. This program can't be sure if it's really
  # a scanner. If it is your scanner, it may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.
 
  # Scanners connected to the parallel port or other proprietary ports
can't be
  # detected by this program.
[root at invigiator gough]# lsusb
Unknown line at line 58
Unknown line at line 2296
Unknown line at line 2297
Unknown line at line 2298
Unknown line at line 2299
Unknown line at line 2300
Unknown line at line 2301
Unknown line at line 2302
Unknown line at line 2303
Unknown line at line 2304
Unknown line at line 2305
Unknown line at line 2306
Unknown line at line 2307
Unknown line at line 2308
Unknown line at line 2309
Unknown line at line 2310
Unknown line at line 2311
Unknown line at line 2312
Unknown line at line 2313
Unknown line at line 2314
Unknown line at line 2315
Unknown line at line 2316
Unknown line at line 2317
Unknown line at line 2318
Unknown line at line 2319
Unknown line at line 2320
Unknown line at line 2321
Unknown line at line 2322
Unknown line at line 2323
Unknown line at line 2324
Unknown line at line 2325
Unknown line at line 2326
Unknown line at line 2327
Unknown line at line 2328
Unknown line at line 2329
Unknown line at line 2330
Unknown line at line 2331
Unknown line at line 2332
Unknown line at line 2333
Unknown line at line 2334
Unknown line at line 2335
 
Bus 004 Device 001: ID 0000:0000
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000
  idProduct          0x0000
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 ec00
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))
 
Bus 003 Device 001: ID 0000:0000
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000
  idProduct          0x0000
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 e800
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))
 
Bus 002 Device 001: ID 0000:0000
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x0000
  idProduct          0x0000
  bcdDevice            0.00
  iManufacturer           0
  iProduct                2 USB UHCI Root Hub
  iSerial                 1 e400
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval             255
  Language IDs: (length=4)
     0000 (null)((null))
 
Bus 001 Device 001: ID 0000:0000
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            9 Hub
  bDeviceSubClass         0
  bDeviceProtocol         1
  bMaxPacketSize0         8
  idVendor           0x0000
  idProduct          0x0000
  bcdDevice            2.04
  iManufacturer           3 Linux 2.4.20-24.9 ehci-hcd
  iProduct                2 Intel Corp. 82801DB USB EHCI Controller
  iSerial                 1 00:1d.7
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           25
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0x40
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          2
        bInterval              12
  Language IDs: (length=4)
     0000 (null)((null))
 
Bus 001 Device 005: ID 04b8:0120 Seiko Epson Corp.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0        64
  idVendor           0x04b8 Seiko Epson Corp.
  idProduct          0x0120
  bcdDevice            1.10
  iManufacturer           1 EPSON
  iProduct                2 EPSON Scanner
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           39
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize        512
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               none
        wMaxPacketSize        512
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               none
        wMaxPacketSize          8
        bInterval              16
  Language IDs: (length=4)
     0409 English(US)
[root at invigiator gough]# cat /etc/sane.d/epson.conf
# epson.conf
#
# here are some examples for how to configure the EPSON backend
#
# SCSI scanner:
#scsi EPSON
#
# Parallel port scanner:
#pio 0x278
#pio 0x378
#pio 0x3BC
#
# USB scanner - only enable this if you have an EPSON scanner. It could
#               otherwise block your non-EPSON scanner from being
#               recognized.
#               Depending on your distribution, you may need either the
#               first or the second entry.
#usb /dev/usb/scanner0
#usb /dev/usb/scanner0
usb 0x04b8 0x0120







More information about the sane-devel mailing list