Problems with external 5V supply

[Supriya s KARANTH]

Hello Hakan,

The log says that the


1)      Hub is high speed

2)      Keyboard is full speed

3)      Mouse is low speed

USB 2.0 supports all 3 speeds.

Could you please also check a Storage device/thumb drive also connected to your hub and try some transfers.

Thanks
Supriya

From: Håkan Berg [mailto:hakan.pm.berg at gmail.com]
Sent: Sunday, April 15, 2012 10:19 PM
To: Kalle Vahlman
Cc: Supriya s KARANTH; Patrik KLINGER; Richard CURNOW; Jacques Bride; users at igloocommunity.org
Subject: Re: Problems with external 5V supply

Thanks, Kalle!

I did not know that. I'm also uncertain how to understand the dmesg log, so here is an excerpt showing what happens when I connect the hub with a mouse and a keyboard already attached (thus all three devices + a keboard card-reader are more or less detected):

[  263.971099] usb 1-1: new high speed USB device number 2 using musb-hdrc
[  264.122680] hub 1-1:1.0: USB hub found
[  264.123199] hub 1-1:1.0: 4 ports detected
[  264.411590] usb 1-1.3: new full speed USB device number 3 using musb-hdrc
[  264.530029] usb 1-1.3: device v413c p2101 is not supported
[  264.548858] input: Dell Dell Smart Card Reader Keyboard as /devices/platform/musb-ux500.0/musb-hdrc/usb1/1-1/1-1.3/1-1.3:1.0/input/input6
[  264.549926] generic-usb 0003:413C:2101.0001: input: USB HID v1.11 Keyboard [Dell Dell Smart Card Reader Keyboard] on usb-musb-hdrc-1.3/input0
[  264.631408] usb 1-1.4: new low speed USB device number 4 using musb-hdrc
[  264.758178] usb 1-1.4: device v045e p0040 is not supported
[  264.781188] input: Microsoft Microsoft Wheel Mouse Optical® as /devices/platform/musb-ux500.0/musb-hdrc/usb1/1-1/1-1.4/1-1.4:1.0/input/input7
[  264.787475] generic-usb 0003:045E:0040.0002: input: USB HID v1.00 Mouse [Microsoft Microsoft Wheel Mouse Optical®] on usb-musb-hdrc-1.4/input0

/Håkan
Den 11 april 2012 11:58 skrev Kalle Vahlman <kalle.vahlman at movial.com<mailto:kalle.vahlman at movial.com>>:
2012/4/11 Håkan Berg <hakan.pm.berg at gmail.com<mailto:hakan.pm.berg at gmail.com>>:
> All USB 2.0 thus high-speed.
I'd like to point out that this statement is not entirely true; USB
2.0 does not dictate devices to be high-speed. For example I have a
Logitech NX50 mouse that is a USB 2.0 device but works at low speed.

I believe the most reliable way to see what speed it is operated at is
plugging it in and looking for the messages about it in dmesg.

--
Kalle Vahlman, Movial Creative Technologies Inc.
Porkkalankatu 20, FI-00180 Helsinki
Tel +358 9 8567 6400<tel:%2B358%209%208567%206400>
Fax +358 9 8567 6401<tel:%2B358%209%208567%206401>
www.movial.com<http://www.movial.com>

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