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question about usb socket on front panel

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  question about usb socket on front panel Long Wind <longwind2@yahoo.com> - 2018-12-12 02:10 +0100
    Re: question about usb socket on front panel Dan Purgert <dan@djph.net> - 2018-12-12 02:40 +0100
    Re: question about usb socket on front panel David <bouncingcats@gmail.com> - 2018-12-12 02:50 +0100
      Re: question about usb socket on front panel David <bouncingcats@gmail.com> - 2018-12-14 13:40 +0100
        Re: question about usb socket on front panel David Wright <deblis@lionunicorn.co.uk> - 2018-12-14 17:20 +0100
          (solved) Re: question about usb socket on front panel Long Wind <longwind2@yahoo.com> - 2018-12-15 01:50 +0100
    Re: question about usb socket on front panel Ben Caradoc-Davies <ben@transient.nz> - 2018-12-12 04:40 +0100
      Re: question about usb socket on front panel Long Wind <longwind2@yahoo.com> - 2018-12-12 05:30 +0100

#203293 — question about usb socket on front panel

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sorry! this question isn't linux specific
there are two usb sockets on front panel of pc casethey appear same, but really are notwireless mouse can only be connected to one of them
could you tell me their difference? Thanks!

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#203294

Long Wind wrote:
> sorry! this question isn't linux specific
> there are two usb sockets on front panel of pc casethey appear same,
> but really are notwireless mouse can only be connected to one of them.
> could you tell me their difference? Thanks!

They're easier to reach than those on the back.  Otherwise, they're
likely nothing special - probably USB2.

-- 
|_|O|_| Registered Linux user #585947
|_|_|O| Github: https://github.com/dpurgert
|O|O|O| PGP: 05CA 9A50 3F2E 1335 4DC5  4AEE 8E11 DDF3 1279 A281

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#203295

On Wed, 12 Dec 2018 at 12:04, Long Wind <longwind2@yahoo.com> wrote:
>
> there are two usb sockets on front panel of pc case
> they appear same, but really are not

1) try running (as root)
lsusb
lsusb -t
lsusb -v
2) you can identify the sockets on the front by comparing those
commands when the sockets are empty, and when they have
something connected
3) if you have questions, show us that information

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#203370

On Wed, 12 Dec 2018 at 15:05, Long Wind <longwind2@yahoo.com> wrote:
>
> below are output of three commands on lenovo
>
> lsusb
> Bus 002 Device 007: ID 25a7:2402
> Bus 002 Device 005: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter
> Bus 002 Device 003: ID 14cd:8601 Super Top
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 001 Device 002: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory
> Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
>
> lsusb -t
> /:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
> /:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
>     |__ Port 2: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
>     |__ Port 2: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M
> /:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
> /:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/8p, 480M
>     |__ Port 3: Dev 3, If 0, Class=Hub, Driver=hub/4p, 480M
>         |__ Port 3: Dev 5, If 0, Class=Vendor Specific Class, Driver=rt2800usb, 480M
>         |__ Port 4: Dev 7, If 0, Class=Human Interface Device, Driver=usbhid, 12M
>         |__ Port 4: Dev 7, If 1, Class=Human Interface Device, Driver=usbhid, 12M
> /:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
>     |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
>     |__ Port 1: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M

First, your original question:
> there are two usb sockets on front panel of pc case
> they appear same, but really are not
> wireless mouse can only be connected to one of them
> could you tell me their difference? Thanks!

The instructions for Windows and Mac for the wireless mouse
receiver are here: https://support.logitech.com/en_us/article/unifying-pairing
I do not know, but I wonder if you move the receiver to a different USB
socket then perhaps it won't work until you repeat the pairing procedure,
whatever that is on Linux.

Now some information how you can tell if the USB sockets are different.

If you run
# lsusb | grep 'Device 001'
you will see:
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

which shows that the CPU can access 5 different USB busses.
Some of these are for internal use only, or maybe not even used
at all. Some of them will be used to provide the external USB
sockets where you can physically plug devices.
Each bus marked 1.1 has a maximum speed of 12 megabit/s.
Each bus marked 2.0 has a maximum speed of 480 megabit/s.
Each bus marked 3.0 has a maximum speed maybe up to 10 gigabit/s.

So we can see that the only USB bus on your system that is
capable of 480 megabit/s is Bus 002.

If you run
# lsusb | grep 'Device 00[^1]'
you will see:
Bus 004 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 002 Device 007: ID 25a7:2402
Bus 002 Device 005: ID 148f:3070 Ralink Technology, Corp.
RT2870/RT3070 Wireless Adapter
Bus 002 Device 003: ID 14cd:8601 Super Top
Bus 001 Device 002: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory

which shows that:
Logitec Unifying Receiver (wireless mouse receiver) is on Bus 004, see
reference [1].
An device made by Areson Technology (unknown) is on Bus 002, see reference [2].
An Ralink RT2870/RT3070 Wireless Adapter (wifi) is on Bus 002, see
reference [3].
A Super Top 4-port hub is on Bus 002, see reference [4].
A SiGma Micro Keyboard TRACER Gamma Ivory keyboard is on Bus 001, see
reference [5].

[1] https://usb-ids.gowdy.us/read/UD/046d/c534
[2] https://usb-ids.gowdy.us/read/UD/25a7
[3] https://usb-ids.gowdy.us/read/UD/148f/3070
[4] https://usb-ids.gowdy.us/read/UD/14cd/8601
[5] https://usb-ids.gowdy.us/read/UD/1c4f/0002

Now, if you run 'lsusb -t' it seems that:
The Logitec Unifying Receiver connected to Port 2 of Bus 004 (12 Mb/s).
The Super Top hub is connected to Port 3 of Bus 002 (480 Mb/s).
The Ralink wifi is connected to Port 3 of the Super Top hub on Bus 002.
The Areson Technology device is connected to Port 4 of the Super Top
hub on Bus 002.
The SiGma keyboard is connected to Port 1 of Bus 01 (12 Mb/s).

Now, you can use this information to find more information that could answer
your question asking if the two front panel USB sockets are different.
Try plugging different devices into these two sockets, and repeat the
above tests, until you can answer these questions:

What is the Bus number of each socket?
What is the Port number of each socket?

With that information, and the above commands, you will be able to see
if there is any difference between the two sockets.

I don't have any expertise in this area, I'm just replying as a learning
exercise and because it appears no-one else has, and of course if I
have made any errors or if there is a better method then I will be very
happy to be corrected :)

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#203379

On Fri 14 Dec 2018 at 23:29:47 (+1100), David wrote:
> On Wed, 12 Dec 2018 at 15:05, Long Wind <longwind2@yahoo.com> wrote:

> > Bus 004 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver

> The instructions for Windows and Mac for the wireless mouse
> receiver are here: https://support.logitech.com/en_us/article/unifying-pairing
> I do not know, but I wonder if you move the receiver to a different USB
> socket then perhaps it won't work until you repeat the pairing procedure,
> whatever that is on Linux.

We have three of these here at home, running 5 devices (3 mice, 2 kbd).
I've only unified them using Windows. Once done, that pairing remains
stable and workable between different USB sockets, different PCs and
different OSes (Windows/linux).

USB (and other) sockets can sometimes have contact issues, especially
on laptops, though the tiny size of this device usually makes this
not a problem.

But I've also had cases where particular sockets don't work well with
particular devices (USB sticks, caddies, DVD writers, Wifi adapters)
or with combinations of these in the same computer. But I've never
tried to run these to earth, just sticking to ways that have worked.

Cheers,
David.

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#203386 — (solved) Re: question about usb socket on front panel

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Thank David (bouncingcats@gmail.com)and David Wright (deblis@lionunicorn.co.uk) ! 

    On Saturday, December 15, 2018 12:15 AM, David Wright <deblis@lionunicorn.co.uk> wrote:
 

 On Fri 14 Dec 2018 at 23:29:47 (+1100), David wrote:
> On Wed, 12 Dec 2018 at 15:05, Long Wind <longwind2@yahoo.com> wrote:

> > Bus 004 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver

> The instructions for Windows and Mac for the wireless mouse
> receiver are here: https://support.logitech.com/en_us/article/unifying-pairing
> I do not know, but I wonder if you move the receiver to a different USB
> socket then perhaps it won't work until you repeat the pairing procedure,
> whatever that is on Linux.

We have three of these here at home, running 5 devices (3 mice, 2 kbd).
I've only unified them using Windows. Once done, that pairing remains
stable and workable between different USB sockets, different PCs and
different OSes (Windows/linux).

USB (and other) sockets can sometimes have contact issues, especially
on laptops, though the tiny size of this device usually makes this
not a problem.

But I've also had cases where particular sockets don't work well with
particular devices (USB sticks, caddies, DVD writers, Wifi adapters)
or with combinations of these in the same computer. But I've never
tried to run these to earth, just sticking to ways that have worked.

Cheers,
David.



   

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#203296

On 12/12/2018 14:04, Long Wind wrote:
> sorry! this question isn't linux specific
> there are two usb sockets on front panel of pc casethey appear same, but really are notwireless mouse can only be connected to one of them
> could you tell me their difference? Thanks!

Bad connection on one port? USB front ports are often connected to the 
motherboard by a pair of internal cables. A bad connection would prevent 
the mouse from working. This could be caused by a flipped internal 
connector, loose connection, or bad cable. A flipped connection can 
prevent booting by shorting 5V to ground.

Do other USB devices work on the port that does not work with the mouse 
adapter?

Sometimes USB ports differ by speed (blue for USB 3, black for USB up to 
2), or permit USB charging (lightning bolt symbol, supports higher 
current). Neither should affect a wireless mouse, because it is a low 
speed device, unless the mouse adapter just will not work with a hub at 
using a particular specification. The hub is internal and typically on 
the motherboard. The front USB ports I have seen are connected to the 
same hub so I would expect both to work or neither.

Kind regards,

-- 
Ben Caradoc-Davies <ben@transient.nz>
Director
Transient Software Limited <https://transient.nz/>
New Zealand

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#203297

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Thank Ben for your expert advice!the usb port can work with wireless adapter though it can't work with wireless mouse
i won't open case and troubleshoot usb connection, it's inconvenient. on the whole my pc works fine, and it has more usb ports at the back. 

    On Wednesday, December 12, 2018 11:39 AM, Ben Caradoc-Davies <ben@transient.nz> wrote:
 

 On 12/12/2018 14:04, Long Wind wrote:
> sorry! this question isn't linux specific
> there are two usb sockets on front panel of pc casethey appear same, but really are notwireless mouse can only be connected to one of them
> could you tell me their difference? Thanks!

Bad connection on one port? USB front ports are often connected to the 
motherboard by a pair of internal cables. A bad connection would prevent 
the mouse from working. This could be caused by a flipped internal 
connector, loose connection, or bad cable. A flipped connection can 
prevent booting by shorting 5V to ground.

Do other USB devices work on the port that does not work with the mouse 
adapter?

Sometimes USB ports differ by speed (blue for USB 3, black for USB up to 
2), or permit USB charging (lightning bolt symbol, supports higher 
current). Neither should affect a wireless mouse, because it is a low 
speed device, unless the mouse adapter just will not work with a hub at 
using a particular specification. The hub is internal and typically on 
the motherboard. The front USB ports I have seen are connected to the 
same hub so I would expect both to work or neither.

Kind regards,

-- 
Ben Caradoc-Davies <ben@transient.nz>
Director
Transient Software Limited <https://transient.nz/>
New Zealand



   

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