Arch Linux

skale

Member

From: Atlanta, GA

Registered: 2006-08-04

Posts: 146

Extra USB ports?

I have two USB ports in the back of my laptop.  Both are filled.  Here is the output of `lsusb`:

Bus 004 Device 003: ID 0bc2:0503 Seagate RSS LLC 
Bus 004 Device 001: ID 0000:0000  
Bus 003 Device 001: ID 0000:0000  
Bus 001 Device 003: ID 0458:0007 KYE Systems Corp. (Mouse Systems) 
Bus 001 Device 001: ID 0000:0000  
Bus 002 Device 001: ID 0000:0000

So, where are the other four ports? Inside? My imagination?

byte

Member

From: Düsseldorf (DE)

Registered: 2006-05-01

Posts: 2,046

Re: Extra USB ports?

Probably onboard/part of the chipset and not connected to physical outputs.

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1000

skale

Member

From: Atlanta, GA

Registered: 2006-08-04

Posts: 146

Re: Extra USB ports?

So I could, theoretically, hook up four more USB ports to the motherboard, and have it work?

lucke

Member

From: Poland

Registered: 2004-11-30

Posts: 4,018

Re: Extra USB ports?

It's the usual case with desktop motherboards. Could be the same with yours.

Stalwart

Member

From: Latvia, Riga

Registered: 2005-10-18

Posts: 445

Website

Re: Extra USB ports?

MoBo's usually have 4-6 ports, but many laptop manufacturers think that 2 is enough

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IRC: Stalwart @ FreeNode
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klixon

Member

From: Nederland

Registered: 2007-01-17

Posts: 525

Re: Extra USB ports?

Uhmmm... EHCI kernel driver normaly "exports" 2 extra lowspeed usb ports per high-speed usb-ports if I recall correctly.
So it might be that you have just 2 ports and are seeing 2 + 2*2 = 6 ports in total.
This is the case in my box...

See http://www.linux-usb.org/usb2.html

Specifically the part on "USB 1.1 "Companion Controllers""

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Stand back, intruder, or i'll blast you out of space! I am Klixon and I don't want any dealings with you human lifeforms. I'm a cyborg!

skale

Member

From: Atlanta, GA

Registered: 2006-08-04

Posts: 146

Re: Extra USB ports?

I see. 

Thanks klixon, and everyone else.