Problems with external 5V supply
Supriya s KARANTH
supriya.karanth at stericsson.com
Mon Apr 16 05:33:55 UTC 2012
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.
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
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
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>
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