RISC OS, raspbery pi & lapdock query

109 posts, 21 voices

Pages: 1 2 3 4 5

Dec 28, 2014 11:56pm

Figured out the USB audio (I think)…

I am guessing it is the mixer controls attached to various keys on the keyboard.

And audio is definitely being pushed over HDMI as I tested with the USB cable connected to my laptop (to provide the data signal the lapdock required to turn on, but to isolate the lapdock from any USB data generated by the pi).

Dec 29, 2014 12:59am

Raik (463) 2061 posts

I think USB audio is not the reason.
Same Product / Vendor ID but much newer firmware, maybe.
I would consider (if I were you) if B and B+ behave the same. Then I would try a hub between USB Data (The A path). Sometimes work devices one a hub better than directly. And the above linked HID stuff I would try also.
Sorry, not really big ideas…

Dec 29, 2014 6:59pm

Jonathan Bond (2397) 41 posts

Sorry for the size of the post. I am attempting to compare mine and Raik’s USB descriptors side by side.

Here is the first pair:

Lapdock			Mine (LD100)			Raik’s (Atrix LD ???)
-————————————————-			-—————————————————————————-			-—————————————————————————-
Device			USB5			USB4
0	2	total size of ServiceCall block	93			111
2	2	offset to descriptor list	0×20			0×20
4	20	name	USB5			USB4
24	1	bus number	1			1
25	1	device address	5			4
26	1	host address	3			2
27	1	host port	4			3
28	1	speed	2 full speed			1 low speed
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	12	18		12	18
1	1	bDescriptorType	1	1		1	1
2	2	bcdUSB	110	272		110	272
4	1	bDeviceClass	0	0		0	0
5	1	bDeviceSubClass	0	0		0	0
6	1	bDeviceProtocol	0	0		0	0
7	1	bMaxPacketSize	8	8		8	8
8	2	idVendor	22b8	8888		22b8	8888
10	2	idProduct	938	2360		93a	2362
12	2	bcdDevice	408	1032		100	256
14	1	iManufacturer	1	1	‘Motorola Mobility’	1	1	’’
15	1	iProduct	2	2	‘Motorola USB keyboard [fr basic]’	2	2	‘Motorola USB keyboard [de basic]’
16	1	iSerialNumber	3	3	‘F7C193460D000100’	0	0	’’
17	1	bNumConfigurations	1	1		1	1
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Configuration Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	9	9		9	9
1	1	bDescriptorType	2	2		2	2
2	2	wTotalLength	29	41		3b	59
4	1	bNumInterfaces	1	1		2	2
5	1	bConfigurationValue	1	1		1	1
6	1	iConfiguration	4	4	‘HID Interface’	0	0	’’
7	1	bmAttributes	e0	224	(bit7) USB 1.0 bus powered	a0	160	(bit7) USB 1.0 bus powered
					(bit6) Self powered,			(bit6) Bus powered,
					(bit5) Remote wakeup			(bit5) Remote wakeup
8	1	bMaxPower	32	50	100mA	32	50	100mA
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	9	9		9	9
1	1	bDescriptorType	4	4		4	4
2	1	bInterfaceNumber	0	0		0	0
3	1	bAlternateSetting	0	0		0	0
4	1	bNumEndPoints	2	2		1	1
5	1	bInterfaceClass	3	3	HID	3	3	HID
6	1	bInterfaceSubClass	1	1	Boot interface	1	1	Boot interface
7	1	bInterfaceProtocol	1	1	Keyboard	1	1	Keyboard
8	1	iInterface	5	5	‘Motorola HD Dock’	0	0	’’
-————————————————-			-—————————————————————————-			-—————————————————————————-

HID Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	9	9		9	9
1	1	bDescriptorType	21	33		21	33
2	2	bcdHID	101	257		110	272
4	1	bCountryCode	0	0		0	0
5	1	bNumDescriptors	1	1		1	1
6	1	bReportDescType	22	34		22	34
7	2	wReportDescLength	c8	200		3f	63
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	7	7		7	7
1	1	bDescriptorType	5	5		5	5
2	1	bEndPointAddress	81	129	Endpoint 1 – IN	81	129	Endpoint 1 – IN
3	1	bmAttributes	3	3	Interrupt	3	3	Interrupt
4	2	wMaxPacketSize	40	64		8	8
6	1	bInterval	5	5		a	10
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength	7	7
1	1	bDescriptorType	5	5
2	1	bEndPointAddress	1	1	Endpoint 1 – OUT
3	1	bmAttributes	3	3	Interrupt
4	2	wMaxPacketSize	40	64
6	1	bInterval	5	5
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength				9	9
1	1	bDescriptorType				4	4
2	1	bInterfaceNumber				1	1
3	1	bAlternateSetting				0	0
4	1	bNumEndPoints				1	1
5	1	bInterfaceClass				3	3	HID
6	1	bInterfaceSubClass				1	1	Boot interface
7	1	bInterfaceProtocol				2	2	Mouse
8	1	iInterface				0	0	’’
-————————————————-			-—————————————————————————-			-—————————————————————————-

HID Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength				9	9
1	1	bDescriptorType				21	33
2	2	bcdHID				110	272
4	1	bCountryCode				0	0
5	1	bNumDescriptors				1	1
6	1	bReportDescType				22	34
7	2	wReportDescLength				5e	94
-————————————————-			-—————————————————————————-			-—————————————————————————-

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-————————————————-			-—————————————————————————-			-—————————————————————————-
0	1	bLength				7	7
1	1	bDescriptorType				5	5
2	1	bEndPointAddress				82	130	Endpoint 2 – IN
3	1	bmAttributes				3	3	Interrupt
4	2	wMaxPacketSize				8	8
6	1	bInterval				a	10
-————————————————-			-—————————————————————————-			-—————————————————————————-

Dec 29, 2014 9:32pm

Jonathan Bond (2397) 41 posts

Lapdock			Mine (LD100)			Raik’s (Atrix LD ???)
-—————————————————————			-——————————————————————————————			-——————————————————————————————
Device			USB4			USB3
0	2	total size of ServiceCall block	301			93
2	2	offset to descriptor list	0×20			0×20
4	20	name	USB4			USB3
24	1	bus number	1			1
25	1	device address	4			3
26	1	host address	3			2
27	1	host port	3			1
28	1	speed	2 full speed			2 full speed
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	12	18		12	18
1	1	bDescriptorType	1	1		1	1
2	2	bcdUSB	200	512		110	272
4	1	bDeviceClass	0	0		0	0
5	1	bDeviceSubClass	0	0		0	0
6	1	bDeviceProtocol	0	0		0	0
7	1	bMaxPacketSize	40	64		8	8
8	2	idVendor	22b8	8888		22b8	8888
10	2	idProduct	6720	26400		938	2360
12	2	bcdDevice	100	256		100	256
14	1	iManufacturer	1	1	‘Motorola’	1	1	‘Motorola Mobility’
15	1	iProduct	2	2	‘Motorola USB Audio LD2.0 Std’	2	2	‘Motorola HD Dock’
16	1	iSerialNumber	3	3	‘000000000000’	3	3	‘84718B460F001D00’
17	1	bNumConfigurations	1	1		1	1
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Configuration Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9		9	9
1	1	bDescriptorType	2	2		2	2
2	2	wTotalLength	f9	249		29	41
4	1	bNumInterfaces	4	4		1	1
5	1	bConfigurationValue	1	1		1	1
6	1	iConfiguration	0	0	’’	4	4	‘HID Interface’
7	1	bmAttributes	c0	192	(bit7) USB 1.0 bus powered	e0	224	(bit7) USB 1.0 bus powered
					(bit6) Self powered,			(bit6) Self powered,
					(bit5) No remote wakeup			(bit5) Remote wakeup
8	1	bMaxPower	32	50	100mA	32	50	100mA
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9		9	9
1	1	bDescriptorType	4	4		4	4
2	1	bInterfaceNumber	0	0		0	0
3	1	bAlternateSetting	0	0		0	0
4	1	bNumEndPoints	0	0		2	2
5	1	bInterfaceClass	1	1	Audio	3	3	HID
6	1	bInterfaceSubClass	1	1	Control	1	1	Boot interface
7	1	bInterfaceProtocol	0	0		1	1	Keyboard
8	1	iInterface	0	0	’’	5	5	‘Motorola HD Dock’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

HID Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength				9	9
1	1	bDescriptorType				21	33
2	2	bcdHID				101	257
4	1	bCountryCode				0	0
5	1	bNumDescriptors				1	1
6	1	bReportDescType				22	34
7	2	wReportDescLength				59	89
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength				7	7
1	1	bDescriptorType				5	5
2	1	bEndPointAddress				81	129	Endpoint 1 – IN
3	1	bmAttributes				3	3	Interrupt
4	2	wMaxPacketSize				40	64
6	1	bInterval				64	100
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength				7	7
1	1	bDescriptorType				5	5
2	1	bEndPointAddress				1	1	Endpoint 1 – OUT
3	1	bmAttributes				3	3	Interrupt
4	2	wMaxPacketSize				40	64
6	1	bInterval				64	100
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Header Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	a	10
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	1	1
3	2	bcdADC	100	256
5	2	wTotalLength	48	72
7	1	bInCollection	2	2
8	1	baInterfaceNr⁰	1	1
9	1	baInterfaceNr¹	2	2
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Input Terminal Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	c	12
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	2	2
3	1	bTerminalID	1	1
4	2	wTerminalType	201	513	Microphone
6	1	bAssocTerminal	0	0
7	1	bNrChannels	2	2
8	2	wChannelConfig	3	3	Left Front, Right Front
10	1	iChannelNames	0	0	’’
11	1	iTerminal	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Feature Unit Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	a	10
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	6	6
3	1	bUnitID	2	2
4	1	bSourceID	1	1
5	1	bControlSize	1	1
6	1	bmaControls⁰	43	67	Mute, Volume, Automatic Gain
7	1	bmaControls¹	0	0
8	1	bmaControls²	0	0
9	1	iFeature	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Output Terminal Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	3	3
3	1	bTerminalID	3	3
4	2	wTerminalType	101	257	USB streaming
6	1	bAssocTerminal	0	0
7	1	bSourceID	2	2
8	1	iTerminal	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Input Terminal Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	c	12
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	2	2
3	1	bTerminalID	4	4
4	2	wTerminalType	101	257	USB streaming
6	1	bAssocTerminal	0	0
7	1	bNrChannels	2	2
8	2	wChannelConfig	3	3	Left Front, Right Front
10	1	iChannelNames	0	0	’’
11	1	iTerminal	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Feature Unit Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	a	10
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	6	6
3	1	bUnitID	5	5
4	1	bSourceID	4	4
5	1	bControlSize	1	1
6	1	bmaControls⁰	1	1	Mute
7	1	bmaControls¹	2	2	Volume
8	1	bmaControls²	2	2	Volume
9	1	iFeature	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Control Interface Output Terminal Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	3	3
3	1	bTerminalID	6	6
4	2	wTerminalType	301	769	Speaker
6	1	bAssocTerminal	0	0
7	1	bSourceID	5	5
8	1	iTerminal	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————
Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	4	4
2	1	bInterfaceNumber	1	1
3	1	bAlternateSetting	0	0
4	1	bNumEndPoints	0	0
5	1	bInterfaceClass	1	1	Audio
6	1	bInterfaceSubClass	2	2	Streaming
7	1	bInterfaceProtocol	0	0
8	1	iInterface	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	4	4
2	1	bInterfaceNumber	1	1
3	1	bAlternateSetting	1	1
4	1	bNumEndPoints	1	1
5	1	bInterfaceClass	1	1	Audio
6	1	bInterfaceSubClass	2	2	Streaming
7	1	bInterfaceProtocol	0	0
8	1	iInterface	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Interface General Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	7	7
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	1	1
3	1	bTerminalLink	3	3
4	1	bDelay	1	1
5	2	wFormatFlag	1	1	PCM
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Interface Format Type Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	1a	26
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	2	2
3	1	bFormatType	1	1
4	1	bNrChannels	2	2
5	1	bSubFrameSize	2	2
6	1	bBitResolution	10	16
7	1	bSamFreqType	6	6
8	3	tSamFreq⁰	1f40	8000	Hz
11	3	tSamFreq¹	3e80	16000	Hz
14	3	tSamFreq²	5dc0	24000	Hz
17	3	tSamFreq³	7d00	32000	Hz
20	3	tSamFreq⁴	ac44	44100	Hz
23	3	tSamFreq⁵	bb80	48000	Hz
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	5	5
2	1	bEndPointAddress	81	129	Endpoint 1 – IN
3	1	bmAttributes	5	5	Isochronous,
					Asynchronous,
					Data Endpoint
4	2	wMaxPacketSize	c8	200
6	1	bInterval	1	1
7	1	bRefresh	0	0
8	1	bSynchAddress	0	0
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	7	7
1	1	bDescriptorType	25	37
2	1	bDescriptorSubType	1	1
3	1	bmAttributes	1	1
4	1	bLockDelayUnits	0	0
5	2	wLockDelay	0	0
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	4	4
2	1	bInterfaceNumber	2	2
3	1	bAlternateSetting	0	0
4	1	bNumEndPoints	0	0
5	1	bInterfaceClass	1	1	Audio
6	1	bInterfaceSubClass	2	2	Streaming
7	1	bInterfaceProtocol	0	0
8	1	iInterface	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	4	4
2	1	bInterfaceNumber	2	2
3	1	bAlternateSetting	1	1
4	1	bNumEndPoints	1	1
5	1	bInterfaceClass	1	1	Audio
6	1	bInterfaceSubClass	2	2	Streaming
7	1	bInterfaceProtocol	0	0
8	1	iInterface	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Interface General Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	7	7
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	1	1
3	1	bTerminalLink	4	4
4	1	bDelay	3	3
5	2	wFormatFlag	1	1	PCM
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Interface General Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	1a	26
1	1	bDescriptorType	24	36
2	1	bDescriptorSubType	2	2
3	1	bFormatType	1	1
4	1	bNrChannels	2	2
5	1	bSubFrameSize	2	2
6	1	bBitResolution	10	16
7	1	bSamFreqType	6	6
8	3	tSamFreq⁰	1f40	8000	Hz
11	3	tSamFreq¹	3e80	16000	Hz
14	3	tSamFreq²	5dc0	24000	Hz
17	3	tSamFreq³	7d00	32000	Hz
20	3	tSamFreq⁴	ac44	44100	Hz
23	3	tSamFreq⁵	bb80	48000	Hz
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	5	5
2	1	bEndPointAddress	1	1	Endpoint 1 – OUT
3	1	bmAttributes	9	9	Isochronous,
					Adaptive,
					Data Endpoint
4	2	wMaxPacketSize	c0	192
6	1	bInterval	1	1
7	1	bRefresh	0	0
8	1	bSynchAddress	0	0
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Audio Streaming Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	7	7
1	1	bDescriptorType	25	37
2	1	bDescriptorSubType	1	1
3	1	bmAttributes	1	1
4	1	bLockDelayUnits	1	1
5	2	wLockDelay	4	4
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Interface Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	4	4
2	1	bInterfaceNumber	3	3
3	1	bAlternateSetting	0	0
4	1	bNumEndPoints	1	1
5	1	bInterfaceClass	3	3	HID
6	1	bInterfaceSubClass	0	0
7	1	bInterfaceProtocol	0	0
8	1	iInterface	0	0	’’
-—————————————————————			-——————————————————————————————			-——————————————————————————————

HID Device Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	9	9
1	1	bDescriptorType	21	33
2	2	bcdHID	100	256
4	1	bCountryCode	0	0
5	1	bNumDescriptors	1	1
6	1	bReportDescType	22	34
7	2	wReportDescLength	a1	161
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Standard Endpoint Descriptor			Mine (LD100)			Raik’s (Atrix LD ???)
Off	Sz	Name	Hex	Dec		Hex	Dec
-—————————————————————			-——————————————————————————————			-——————————————————————————————
0	1	bLength	7	7
1	1	bDescriptorType	5	5
2	1	bEndPointAddress	84	132	Endpoint 4 – IN
3	1	bmAttributes	3	3	Interrupt
4	2	wMaxPacketSize	25	37
6	1	bInterval	1	1
-—————————————————————			-——————————————————————————————			-——————————————————————————————

Dec 29, 2014 10:41pm

Jonathan Bond (2397) 41 posts

Looking through that, it seems that some parts have been switched between the USB descriptors.

But that is all beyond me.

maybe that will help someone identify the issue.

Raik – would it be possible for you to post a screen shot of the expanded !USBInfo tree? like my ones here:

Dec 30, 2014 12:10am

Raik (463) 2061 posts

No problem…

Note: Modell A, only one USB, no Network

May 17, 2015 11:00am

Alex Gibson (528) 55 posts

Hi all,

I’m having exactly the same issue:

Motorola Lapdock 100, Raspberry Pi (Original Model B), dedicated cables bought on eBay as made for Atrix hacking

In Raspbian, I can get it all working perfectly, but only if the battery is powered down, I connect everything up, and power the Lapdock from external power.

In Risc OS, the same, except the internal keyboard and mouse don’t work.

Did you guys actually get this working??

I bought the Lapdock to be a Risc OS laptop – I want to do some programming on the train. So I will continue to hack about, but it seems from the above you are onto something beyond my immediate knowledge, so I’d be grateful for pointers!

May 7, 2018 5:30pm