On Mon, 2011-03-14 at 14:20 +0000, Andrew Morgan wrote:
> I believe keyboards & mice are all USB 1.1. I have some USB 1.1 devices
> working on Ubuntu.
>
> If it is a 54mbit (or faster) USB device then I would expect it to be
> USB 2, otherwise it is limited to 11 Mb/s or thereabouts.
>
> 'lsusb -v' will show you a lot of information. The 'bcdUSB' lines show
> you the USB version in use by a particular device.
>
Interesting:
peterm@peterm-desktop:~$ lsusb -v
Bus 004 Device 003: ID 050d:705c Belkin Components F5D7050 Wireless G
Adapter v4000 [Zydas ZD1211B]
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 0x050d Belkin Components
idProduct 0x705c F5D7050 Wireless G Adapter v4000 [Zydas
ZD1211B]
bcdDevice 48.10
iManufacturer 16
iProduct 32
iSerial 0
bNumConfigurations 1
....
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
can't get device qualifier: Operation not permitted
can't get debug descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
.....
bInterval 255
can't get hub descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
.........
bInterval 255
can't get hub descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 9 Hub
.............
bInterval 255
can't get hub descriptor: Operation not permitted
cannot read device status, Operation not permitted (1)
peterm@peterm-desktop:~$
Interesting that the Belkin identifies itself as USB 2.0, but will only
work after the commands previously mentioned, and all the other ports
say that they are now(?) USB 1.10
More tests needed....
P.
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