[CGUYS] USB Malfunction

2008-01-28 Thread Jay Montero
Can anyone tell me why on a Windows XP machine with a scanner, printer, and 
multi-card reader all on USB the printer loses connectivity from time to time?  
Also I noticed in Device Manager there are 4 USB controller though there are 6 
USB ports.  What is the relation?



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Re: [CGUYS] USB Malfunction

2008-01-28 Thread John DeCarlo
On Jan 28, 2008 7:55 AM, Jay Montero [EMAIL PROTECTED] wrote:

 Can anyone tell me why on a Windows XP machine with a scanner, printer,
 and multi-card reader all on USB the printer loses connectivity from time to
 time?  Also I noticed in Device Manager there are 4 USB controller though
 there are 6 USB ports.  What is the relation?


I have noticed two things, and I can't explain why those design decisions
were made.

1.  Port USB0 is different from USB1 - therefore a printer installed on USB0
is not installed on USB1.  If the printer gets switched from USB0 to USB1,
it is no longer installed/connected for use.

2.  Occasionally Windows will think that the order of USB ports is different
from before.  Not sure why.  This leads to issues related to 1, above.  1
will also happen if something is unplugged from one physical port and
plugged into another physical USB port.

-- 
John DeCarlo, My Views Are My Own



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Re: [CGUYS] USB Malfunction

2008-01-28 Thread Fred Holmes
This seems to be generally true.  I've seen this on every computer I have, 
admittedly all Windows 2000.  I suspect that each piece of USB hardware 
(controller, hub, etc, as well as peripheral) has a unique hardware address, 
similar to the MAC address that Ethernet adapters and other networking hardware 
have.

If something auto-installs, then it will re-install automatically when plugged 
into a different USB port, and the installation may be transparent (invisible 
to the user).  If the printer requires manual installation (selection of the 
printer make/model from a list), then it must be manually reinstalled if you 
change the USB port that it is connected to.  If you disconnect something that 
doesn't auto-install, be sure to plug it back into the same port.

Fred Holmes

At 11:09 AM 1/28/2008, John DeCarlo wrote:
1.  Port USB0 is different from USB1 - therefore a printer installed on USB0
is not installed on USB1.  If the printer gets switched from USB0 to USB1,
it is no longer installed/connected for use.



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Re: [CGUYS] USB Malfunction

2008-01-28 Thread Rev. Stewart Marshall

Failing USB port?

Stewart


At 06:55 AM 1/28/2008, you wrote:
Can anyone tell me why on a Windows XP machine with a scanner, 
printer, and multi-card reader all on USB the printer loses 
connectivity from time to time?  Also I noticed in Device Manager 
there are 4 USB controller though there are 6 USB ports.  What is the relation?


Rev. Stewart A. Marshall
mailto:[EMAIL PROTECTED]
Prince of Peace
Ozark, AL  SL 82



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