Re: Unsupported DisplayLink (udl or udlfb module)

From: Paolo Bolzoni
Date: Tue Jul 23 2013 - 04:15:50 EST


On Mon, Jul 22, 2013 at 10:07 PM, Belisko Marek <marek.belisko@xxxxxxxxx> wrote:
>> But, it does not matter what of the two modules I have loaded it
>> seems the kernel does not recognize it
> Matching is done by VID = 0x17e9 which seem match but then by
> bInterfaceClass = 0xff, bInterfaceSubClass = 0x00 and bInterfaceProtocol = 0x00.
> Can you please post lsusb -v to check what are other parameters for your device.
Sure thing, I appended the output at the end of the email because it
is a little long.

Please if you answer put my address paolo.bolzoni.brown@xxxxxxxxx in
CC as I did not register to the mailing list.

Your sincerely,
Paolo


Here is the lsusb -v output about my DisplayLink:

Bus 003 Device 002: ID 17e9:4300 DisplayLink
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 9
idVendor 0x17e9 DisplayLink
idProduct 0x4300
bcdDevice 2.36
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 103
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 126mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 3
iInterface 0
** UNRECOGNIZED: 0c 5f 01 00 0a 00 04 04 01 00 04 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0400 1x 1024 bytes
bInterval 0
bMaxBurst 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 5
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 254 Application Specific Interface
bInterfaceSubClass 1 Device Firmware Update
bInterfaceProtocol 1
iInterface 0

Device Firmware Upgrade Interface Descriptor:
bLength 9
bDescriptorType 33
bmAttributes 1
Will Not Detach
Manifestation Intolerant
Upload Unsupported
Download Supported
wDetachTimeout 200 milliseconds
wTransferSize 1024 bytes
bcdDFUVersion 1.01
** UNRECOGNIZED: 10 40 06 01 09 01 01 03 45 6c 6c 61 44 6f 63 6b
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