On Thu, Feb 17, 2022 at 6:07 AM David Ward <david.w...@gatech.edu> wrote:
>
> On 2/23/2021 8:13 AM, Martin-Éric Racine wrote:
> > $ sudo sane-find-scanner
> > found USB scanner (vendor=0x04a9 [Canon], product=0x2220 [CanoScan],
> > chip=LM9830) at libusb:002:003
> > found USB scanner (vendor=0x0411 [Ralink], product=0x00e8 [802.11 n
> > WLAN]) at libusb:001:004
> > found USB scanner (vendor=0x0b05 [Ralink], product=0x179d [802.11 n
> > WLAN]) at libusb:001:003
>
> What is the output of:
> $ sudo sane-find-scanner -v -v
Attached.
> The relevant source code is here:
> https://gitlab.com/sane-project/backends/-/blob/1.1.1/tools/sane-find-scanner.c#L1039-1060
>
> Apparently, this assumes that if your USB device exposes even /one/
> interface where the device class or interface class is
> "vendor-specific", then it is a scanner. That is almost certainly the
> problem.
That's probably it.
Martin-Éric
This is sane-find-scanner from sane-backends 1.0.31-debian
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
searching for SCSI scanners:
checking /dev/scanner... failed to open (Invalid argument)
checking /dev/sg0... failed to open (Invalid argument)
checking /dev/sg1... failed to open (Invalid argument)
checking /dev/sg2... failed to open (Invalid argument)
checking /dev/sg3... failed to open (Invalid argument)
checking /dev/sg4... failed to open (Invalid argument)
checking /dev/sg5... failed to open (Invalid argument)
checking /dev/sg6... failed to open (Invalid argument)
checking /dev/sg7... failed to open (Invalid argument)
checking /dev/sg8... failed to open (Invalid argument)
checking /dev/sg9... failed to open (Invalid argument)
checking /dev/sga... failed to open (Invalid argument)
checking /dev/sgb... failed to open (Invalid argument)
checking /dev/sgc... failed to open (Invalid argument)
checking /dev/sgd... failed to open (Invalid argument)
checking /dev/sge... failed to open (Invalid argument)
checking /dev/sgf... failed to open (Invalid argument)
checking /dev/sgg... failed to open (Invalid argument)
checking /dev/sgh... failed to open (Invalid argument)
checking /dev/sgi... failed to open (Invalid argument)
checking /dev/sgj... failed to open (Invalid argument)
checking /dev/sgk... failed to open (Invalid argument)
checking /dev/sgl... failed to open (Invalid argument)
checking /dev/sgm... failed to open (Invalid argument)
checking /dev/sgn... failed to open (Invalid argument)
checking /dev/sgo... failed to open (Invalid argument)
checking /dev/sgp... failed to open (Invalid argument)
checking /dev/sgq... failed to open (Invalid argument)
checking /dev/sgr... failed to open (Invalid argument)
checking /dev/sgs... failed to open (Invalid argument)
checking /dev/sgt... failed to open (Invalid argument)
checking /dev/sgu... failed to open (Invalid argument)
checking /dev/sgv... failed to open (Invalid argument)
checking /dev/sgw... failed to open (Invalid argument)
checking /dev/sgx... failed to open (Invalid argument)
checking /dev/sgy... failed to open (Invalid argument)
checking /dev/sgz... failed to open (Invalid argument)
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
searching for USB scanners:
checking /dev/usb/scanner... failed to open (Invalid argument)
checking /dev/usb/scanner0... failed to open (Invalid argument)
checking /dev/usb/scanner1... failed to open (Invalid argument)
checking /dev/usb/scanner2... failed to open (Invalid argument)
checking /dev/usb/scanner3... failed to open (Invalid argument)
checking /dev/usb/scanner4... failed to open (Invalid argument)
checking /dev/usb/scanner5... failed to open (Invalid argument)
checking /dev/usb/scanner5... failed to open (Invalid argument)
checking /dev/usb/scanner7... failed to open (Invalid argument)
checking /dev/usb/scanner8... failed to open (Invalid argument)
checking /dev/usb/scanner9... failed to open (Invalid argument)
checking /dev/usb/scanner10... failed to open (Invalid argument)
checking /dev/usb/scanner11... failed to open (Invalid argument)
checking /dev/usb/scanner12... failed to open (Invalid argument)
checking /dev/usb/scanner13... failed to open (Invalid argument)
checking /dev/usb/scanner14... failed to open (Invalid argument)
checking /dev/usb/scanner15... failed to open (Invalid argument)
checking /dev/usbscanner... failed to open (Invalid argument)
checking /dev/usbscanner0... failed to open (Invalid argument)
checking /dev/usbscanner1... failed to open (Invalid argument)
checking /dev/usbscanner2... failed to open (Invalid argument)
checking /dev/usbscanner3... failed to open (Invalid argument)
checking /dev/usbscanner4... failed to open (Invalid argument)
checking /dev/usbscanner5... failed to open (Invalid argument)
checking /dev/usbscanner6... failed to open (Invalid argument)
checking /dev/usbscanner7... failed to open (Invalid argument)
checking /dev/usbscanner8... failed to open (Invalid argument)
checking /dev/usbscanner9... failed to open (Invalid argument)
checking /dev/usbscanner10... failed to open (Invalid argument)
checking /dev/usbscanner11... failed to open (Invalid argument)
checking /dev/usbscanner12... failed to open (Invalid argument)
checking /dev/usbscanner13... failed to open (Invalid argument)
checking /dev/usbscanner14... failed to open (Invalid argument)
checking /dev/usbscanner15... failed to open (Invalid argument)
trying libusb:
<device descriptor of 0x8564/0x4000 at 002:009 (TS-RDF8 Transcend )>
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x8564
idProduct 0x4000
bcdDevice 0.210
iManufacturer 3 (TS-RDF8 )
iProduct 4 (Transcend )
iSerialNumber 5 (000000079)
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 128 ()
MaxPower 500 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8
bInterfaceSubClass 6
bInterfaceProtocol 80
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 (out 0x02)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x076b/0x1021 at 002:008 (OMNIKEY Smart Card Reader USB)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x076B
idProduct 0x1021
bcdDevice 1.00
iManufacturer 1 (OMNIKEY)
iProduct 2 (Smart Card Reader USB)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 93
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 3 (CCID)
bmAttributes 160 (Remote Wakeup)
MaxPower 100 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 11
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 (in 0x03)
bmAttributes 3 (interrupt)
wMaxPacketSize 8
bInterval 24 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 (in 0x04)
bmAttributes 2 (bulk)
wMaxPacketSize 64
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 2>
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 (out 0x05)
bmAttributes 2 (bulk)
wMaxPacketSize 64
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x05e3/0x0605 at 002:005 (USB2.0 Hub)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x05E3
idProduct 0x0605
bcdDevice 6.011
iManufacturer 0 ()
iProduct 1 (USB2.0 Hub)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 100 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x04a9/0x2220 at 002:004 (Canon CanoScan)>
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 255
bDeviceSubClass 0
bDeviceProtocol 255
bMaxPacketSize0 8
idVendor 0x04A9
idProduct 0x2220
bcdDevice 1.00
iManufacturer 1 (Canon)
iProduct 2 (CanoScan)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 160 (Remote Wakeup)
MaxPower 500 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 16 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 (in 0x02)
bmAttributes 2 (bulk)
wMaxPacketSize 64
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 2>
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 (out 0x03)
bmAttributes 2 (bulk)
wMaxPacketSize 64
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<trying to find out which USB chip is used>
checking for LM983[1,2,3] ...
<This USB chip looks like a LM9832/3 (result from sane-backends 1.0.31-debian)>
found USB scanner (vendor=0x04a9 [Canon], product=0x2220 [CanoScan],
chip=LM9832/3) at libusb:002:004
could not fetch string descriptor: Pipe error
could not fetch string descriptor: Pipe error
<device descriptor of 0x12d1/0x1082 at 002:011>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x12D1
idProduct 0x1082
bcdDevice 3.18
iManufacturer 1 ()
iProduct 2 ()
could not fetch string descriptor: Pipe error
iSerialNumber 3 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 62
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 192 (Self-powered)
MaxPower 500 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255
bInterfaceSubClass 255
bInterfaceProtocol 0
could not fetch string descriptor: Pipe error
iInterface 6 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 (out 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 2>
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 (in 0x02)
bmAttributes 3 (interrupt)
wMaxPacketSize 28
bInterval 6 ms
bRefresh 0
bSynchAddress 0
<interface 1>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8
bInterfaceSubClass 6
bInterfaceProtocol 80
could not fetch string descriptor: Pipe error
iInterface 4 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 (in 0x03)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 (out 0x02)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 1 ms
bRefresh 0
bSynchAddress 0
<trying to find out which USB chip is used>
checking for LM983[1,2,3] ...
this is not a LM983x (bcdUSB = 0x200)
checking for GT-6801 ...
this is not a GT-6801 (bDeviceClass = 0)
checking for GT-6816 ...
this is not a GT-6816 (bcdUSB = 0x200)
checking for GLxxx ...
this is not a GL646 (bDeviceClass = 0, bInterfaceClass = 255)
this is not a GLxxx (bDeviceClass = 0, bInterfaceClass = 255)
<Couldn't determine the type of the USB chip (result from sane-backends
1.0.31-debian)>
found USB scanner (vendor=0x12d1, product=0x1082) at libusb:002:011
<device descriptor of 0x046d/0xc077 at 002:006 (Logitech USB Optical Mouse)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x046D
idProduct 0xC077
bcdDevice 114.00
iManufacturer 1 (Logitech)
iProduct 2 (USB Optical Mouse)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 160 (Remote Wakeup)
MaxPower 100 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3
bInterfaceSubClass 1
bInterfaceProtocol 2
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 4
bInterval 10 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x05e3/0x0607 at 002:003 (USB2.0 Hub)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 2
bMaxPacketSize0 64
idVendor 0x05E3
idProduct 0x0607
bcdDevice 8.01
iManufacturer 0 ()
iProduct 1 (USB2.0 Hub)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 100 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 1
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<altsetting 1>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 2
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x8087/0x0024 at 002:002>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x8087
idProduct 0x0024
bcdDevice 0.00
iManufacturer 0 ()
iProduct 0 ()
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 0 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x1d6b/0x0002 at 002:001 (Linux 5.10.0-11-amd64 ehci_hcd
EHCI Host Controller)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1D6B
idProduct 0x0002
bcdDevice 5.10
iManufacturer 3 (Linux 5.10.0-11-amd64 ehci_hcd)
iProduct 2 (EHCI Host Controller)
iSerialNumber 1 (0000:00:1d.0)
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 0 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 4
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x0411/0x00e8 at 001:004 (Ralink 802.11 n WLAN)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0411
idProduct 0x00E8
bcdDevice 0.01
iManufacturer 1 (Ralink)
iProduct 2 (802.11 n WLAN)
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 128 ()
MaxPower 4 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 255
bInterfaceSubClass 255
bInterfaceProtocol 255
iInterface 3 (1.0)
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 (out 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 2>
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 (out 0x02)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 3>
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 (out 0x03)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 4>
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 (out 0x04)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 5>
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 (out 0x05)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 6>
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 (out 0x06)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<trying to find out which USB chip is used>
could not claim USB device interface
found USB scanner (vendor=0x0411 [Ralink], product=0x00e8 [802.11 n WLAN]) at
libusb:001:004
<device descriptor of 0x0b05/0x179d at 001:003 (Ralink 802.11 n WLAN)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0B05
idProduct 0x179D
bcdDevice 1.01
iManufacturer 1 (Ralink)
iProduct 2 (802.11 n WLAN)
iSerialNumber 3 (1.0)
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 128 ()
MaxPower 450 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 7
bInterfaceClass 255
bInterfaceSubClass 255
bInterfaceProtocol 255
iInterface 5 (1.0)
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 1>
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 (out 0x01)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 2>
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 (out 0x02)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 3>
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 (out 0x03)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 4>
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 (out 0x04)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 5>
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 (out 0x05)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<endpoint 6>
bLength 7
bDescriptorType 5
bEndpointAddress 0x06 (out 0x06)
bmAttributes 2 (bulk)
wMaxPacketSize 512
bInterval 0 ms
bRefresh 0
bSynchAddress 0
<trying to find out which USB chip is used>
could not claim USB device interface
found USB scanner (vendor=0x0b05 [Ralink], product=0x179d [802.11 n WLAN]) at
libusb:001:003
<device descriptor of 0x8087/0x0024 at 001:002>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 1
bMaxPacketSize0 64
idVendor 0x8087
idProduct 0x0024
bcdDevice 0.00
iManufacturer 0 ()
iProduct 0 ()
iSerialNumber 0 ()
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 0 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 1
bInterval 12 ms
bRefresh 0
bSynchAddress 0
<device descriptor of 0x1d6b/0x0002 at 001:001 (Linux 5.10.0-11-amd64 ehci_hcd
EHCI Host Controller)>
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1D6B
idProduct 0x0002
bcdDevice 5.10
iManufacturer 3 (Linux 5.10.0-11-amd64 ehci_hcd)
iProduct 2 (EHCI Host Controller)
iSerialNumber 1 (0000:00:1a.0)
bNumConfigurations 1
<configuration 0>
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0 ()
bmAttributes 224 (Self-poweredRemote Wakeup)
MaxPower 0 mA
<interface 0>
<altsetting 0>
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0 ()
<endpoint 0>
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 (in 0x01)
bmAttributes 3 (interrupt)
wMaxPacketSize 4
bInterval 12 ms
bRefresh 0
bSynchAddress 0
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
done
