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Multiple USB Devices on ASUS

Discussion in 'Windows XP' started by LindaM, Jun 9, 2010.

  1. LindaM

    LindaM Flightless Bird

    Hi All,

    I am having an odd problem and don't know if it can be resolved. I
    recently built a new machine using ASUS P5G41-M with 4GB RAM, an Intel
    Core 2 Duo 3GHz processor, and a 380W PSU, running Windows XP SP3. The
    old Machine was an ASUS P5L-VM, with 2GB RAM, an Intel Pentium D
    processor, and a 350W PSU, running Windows XP SP3r.

    The problem:

    I set up the following USB devices on the New PC exactly as I had on
    the old PC:

    1) USB Wireless Mouse
    2) Logitech PC Camera
    3) HP Laserjet P2015 Printer
    4) HO Officejet 6310 AIO Printer

    In addition I have now added:

    5) 500GB Seagate External Hard Drive

    I set up the Laserjet first and made that my default printer. Then I
    set up the Officejet All-In-One printer. The first thing I noticed is
    the printer made itself the default printer. I literally watched it
    change. Then when I tried to print to either printer neither would
    print. If I unplug the device and plug it back in I get the message
    "windows doesn't recognize the device" and then ANYTHING I plug into
    the USB port is not recognized. And some of my other devices are no
    longer recognized.

    I finally uninstalled the Officejet and shut down the PC. I actually
    unplugged the PC from the power supply and then all my devices were
    seen and seemed to be ok. I just cannot add the 2nd printer.

    I spoke to an HP rep who insisted that I would never be able to have 2
    USB printers hooked up because the new motherboards USB ports use
    power differently and therefore I would not be able to have 2 USB
    printers hooked up (Mind you both of these printers are USB - no lpt
    ports). I find this incredibly hard to believe since the new
    motherboards don't even have LPT ports available and EVERYTHING seems
    to be going to the USB. What good is having USB devices if you can't
    have them all plugged in?

    Tell me this guy didn't know what he was talking about and how I can
    resolve this issue. And if you're wondering why I have 2 printers, 1
    is for black & white fast printing (I run a lot of long jobs here) and
    the other is an all-in-one that I can print color, or scan from.

    Things I have tried:

    I swapped power supplies - same problem
    I took the mobo out and put it on a cardboard box to see if there was
    a grounding problem - same problem
    I ran a Windows Repair - same problem

    The only thing that seems to correct, at least while my 4 devices (not
    my 2nd printer) the USB not being recognized is shutting down the PC
    and unplugging it from the power supply then plugging it back in and
    powering back up.

    Anyone run into this? If so, has anyone come up with a solution?

    Thanks

    Linda
     
  2. Paul

    Paul Flightless Bird

    LindaM wrote:
    > Hi All,
    >
    > I am having an odd problem and don't know if it can be resolved. I
    > recently built a new machine using ASUS P5G41-M with 4GB RAM, an Intel
    > Core 2 Duo 3GHz processor, and a 380W PSU, running Windows XP SP3. The
    > old Machine was an ASUS P5L-VM, with 2GB RAM, an Intel Pentium D
    > processor, and a 350W PSU, running Windows XP SP3r.
    >
    > The problem:
    >
    > I set up the following USB devices on the New PC exactly as I had on
    > the old PC:
    >
    > 1) USB Wireless Mouse
    > 2) Logitech PC Camera
    > 3) HP Laserjet P2015 Printer
    > 4) HO Officejet 6310 AIO Printer
    >
    > In addition I have now added:
    >
    > 5) 500GB Seagate External Hard Drive
    >
    > I set up the Laserjet first and made that my default printer. Then I
    > set up the Officejet All-In-One printer. The first thing I noticed is
    > the printer made itself the default printer. I literally watched it
    > change. Then when I tried to print to either printer neither would
    > print. If I unplug the device and plug it back in I get the message
    > "windows doesn't recognize the device" and then ANYTHING I plug into
    > the USB port is not recognized. And some of my other devices are no
    > longer recognized.
    >
    > I finally uninstalled the Officejet and shut down the PC. I actually
    > unplugged the PC from the power supply and then all my devices were
    > seen and seemed to be ok. I just cannot add the 2nd printer.
    >
    > I spoke to an HP rep who insisted that I would never be able to have 2
    > USB printers hooked up because the new motherboards USB ports use
    > power differently and therefore I would not be able to have 2 USB
    > printers hooked up (Mind you both of these printers are USB - no lpt
    > ports). I find this incredibly hard to believe since the new
    > motherboards don't even have LPT ports available and EVERYTHING seems
    > to be going to the USB. What good is having USB devices if you can't
    > have them all plugged in?
    >
    > Tell me this guy didn't know what he was talking about and how I can
    > resolve this issue. And if you're wondering why I have 2 printers, 1
    > is for black & white fast printing (I run a lot of long jobs here) and
    > the other is an all-in-one that I can print color, or scan from.
    >
    > Things I have tried:
    >
    > I swapped power supplies - same problem
    > I took the mobo out and put it on a cardboard box to see if there was
    > a grounding problem - same problem
    > I ran a Windows Repair - same problem
    >
    > The only thing that seems to correct, at least while my 4 devices (not
    > my 2nd printer) the USB not being recognized is shutting down the PC
    > and unplugging it from the power supply then plugging it back in and
    > powering back up.
    >
    > Anyone run into this? If so, has anyone come up with a solution?
    >
    > Thanks
    >
    > Linda


    I can't answer your software question, but I can answer your hardware
    question.

    Asus places Polyfuse devices in the USB path. A single 1.1 amp or
    so (self recovering) fuse, is used to power the two USB ports in
    a "stack". The USB spec limits power to 0.5 amp (i.e. 500 milliamps)
    on each port. So in fact the motherboard is fully capable of powering
    500mA loads on each connector. And if you're only drawing heavy
    power from one connector, it will even allow a bit of overpower,
    before the automatically recovering fuse opens and cuts off power.
    The fuse closes, when it cools off.

    Your power supply is the other, power limiting device. The
    USB ports on a modern motherboard are powered from the +5VSB
    power rail. If you read the label on the side of your power
    supply, it may say "+5VSB @ 2A" or "+5VSB @ 3A". Those are
    maximum current ratings the supply is willing to provide.

    Normally, those are not a limitation. For example, there might
    be an issue, if you connected four or more USB 2.5" external
    hard drives to the computer.

    If a printer had no other source of power, but the USB bus,
    then it could draw up to 500mA. If the printer plugs
    into the wall, then it won't need bus power, and only
    a few milliamps will come from the USB port.

    A device like an Alcatel USB DSL modem can draw 500mA. Some
    of those used to violate the spec, and at 535mA or so,
    would cause some computers to shut off the USB port.

    If you really are limited by the power distribution scheme,
    you can use a self-powered USB hub, to assist in providing
    power. But unless you have the specific power-hungry devices,
    I think this is a "red herring" issue.

    (This USB hub comes with its own power adapter - 5V @ 2A or so.)
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817364017

    Here, the specification actually verifies the power supply
    provided is 5V @ 2A, suitable for up to four USB ports
    running at the max 500mA current each. They never provide
    power adapters big enough to run all the ports flat out.
    I think the biggest I've seen, is a wall adapter for 5V @ 3A
    for a USB hub, but they don't make those any more. This size
    seems to be common now.

    http://www.startech.com/item-specs/ST7202USB-7-Port-USB-20-Hub.aspx

    So, yes there are power limits, but the fact we aren't buried in
    postings from people with USB power problems, tells you that
    most of the time, this isn't an issue.

    Older motherboards used to have a jumper on the motherboard, to
    select USB powering via +5V or +5VSB, but modern motherboards
    no longer support that (convenient) feature. Using +5V eliminates
    all concerns about the power supply being the limit, as that rail
    can provide 20A or more. The +5VSB rail used now, is a weaker
    rail, but for the average person, this is not an issue.

    If you're moving backup data between two USB 2.5" drives, chances
    are you have enough power to do it. If you have a lot of those
    drives hooked up, then there could be trouble. 3.5" external
    hard drives, the ones that have a wall adapter, you can use
    as many of those as you want. And that is because the wall adapter
    is the major source of power.

    Paul
     
  3. smlunatick

    smlunatick Flightless Bird

    On Jun 9, 7:31 pm, linda.madd...@erwyn.com (LindaM) wrote:
    > Hi All,
    >
    > I am having an odd problem and don't know if it can be resolved. I
    > recently built a new machine using ASUS P5G41-M with 4GB RAM, an Intel
    > Core 2 Duo 3GHz processor, and a 380W PSU, running Windows XP SP3. The
    > old Machine was an ASUS P5L-VM, with 2GB RAM, an Intel Pentium D
    > processor, and a 350W PSU, running Windows XP SP3r.
    >
    > The problem:
    >
    > I set up the following USB devices on the New PC exactly as I had on
    > the old PC:
    >
    > 1) USB Wireless Mouse
    > 2) Logitech PC Camera
    > 3) HP Laserjet P2015 Printer
    > 4) HO Officejet 6310 AIO Printer
    >
    > In addition I have now added:
    >
    > 5) 500GB Seagate External Hard Drive
    >
    > I set up the Laserjet first and made that my default printer. Then I
    > set up the Officejet All-In-One printer. The first thing I noticed is
    > the printer made itself the default printer. I literally watched it
    > change. Then when I tried to print to either printer neither would
    > print. If I unplug the device and plug it back in I get the message
    > "windows doesn't recognize the device" and then ANYTHING I plug into
    > the USB port is not recognized. And some of my other devices are no
    > longer recognized.
    >
    > I finally uninstalled the Officejet and shut down the PC. I actually
    > unplugged the PC from the power supply and then all my devices were
    > seen and seemed to be ok. I just cannot add the 2nd printer.
    >
    > I spoke to an HP rep who insisted that I would never be able to have 2
    > USB printers hooked up because the new motherboards USB ports use
    > power differently and therefore I would not be able to have 2 USB
    > printers hooked up (Mind you both of these printers are USB - no lpt
    > ports). I find this incredibly hard to believe since the new
    > motherboards don't even have LPT ports available and EVERYTHING seems
    > to be going to the USB. What good is having USB devices if you can't
    > have them all plugged in?
    >
    > Tell me this guy didn't know what he was talking about and how I can
    > resolve this issue. And if you're wondering why I have 2 printers, 1
    > is for black & white fast printing (I run a lot of long jobs here) and
    > the other is an all-in-one that I can print color, or scan from.
    >
    > Things I have tried:
    >
    > I swapped power supplies - same problem
    > I took the mobo out and put it on a cardboard box to see if there was
    > a grounding problem - same problem
    > I ran a Windows Repair - same problem
    >
    > The only thing that seems to correct, at least while my 4 devices (not
    > my 2nd printer) the USB not being recognized is shutting down the PC
    > and unplugging it from the power supply then plugging it back in and
    > powering back up.
    >
    > Anyone run into this? If so, has anyone come up with a solution?
    >
    > Thanks
    >
    > Linda


    It should be noted that motherboard USB ports are "grouped" together.
    This is generally known as the "USB root hub." Most of these appear
    to share the USB port supplied power over the USB channels. If the
    requested power level exceeds the "alloted" power, the entire USB
    channel shuts all USB devices on that channel. There does not seem to
    be a method of adjusting this. However, you might be able to add more
    power to the USB ports by adding a powered USB hub.
     
  4. sgopus

    sgopus Flightless Bird

    You can have two usb printers installed at the same time, however you can't
    have them both on when you are installing another, turn one off and then
    attempt to install the new one, and as the other posters have said, use a
    HUB, not the USB ports on the PC directly.
    Once they are both installed you can select which one is default.

    "LindaM" wrote:

    > Hi All,
    >
    > I am having an odd problem and don't know if it can be resolved. I
    > recently built a new machine using ASUS P5G41-M with 4GB RAM, an Intel
    > Core 2 Duo 3GHz processor, and a 380W PSU, running Windows XP SP3. The
    > old Machine was an ASUS P5L-VM, with 2GB RAM, an Intel Pentium D
    > processor, and a 350W PSU, running Windows XP SP3r.
    >
    > The problem:
    >
    > I set up the following USB devices on the New PC exactly as I had on
    > the old PC:
    >
    > 1) USB Wireless Mouse
    > 2) Logitech PC Camera
    > 3) HP Laserjet P2015 Printer
    > 4) HO Officejet 6310 AIO Printer
    >
    > In addition I have now added:
    >
    > 5) 500GB Seagate External Hard Drive
    >
    > I set up the Laserjet first and made that my default printer. Then I
    > set up the Officejet All-In-One printer. The first thing I noticed is
    > the printer made itself the default printer. I literally watched it
    > change. Then when I tried to print to either printer neither would
    > print. If I unplug the device and plug it back in I get the message
    > "windows doesn't recognize the device" and then ANYTHING I plug into
    > the USB port is not recognized. And some of my other devices are no
    > longer recognized.
    >
    > I finally uninstalled the Officejet and shut down the PC. I actually
    > unplugged the PC from the power supply and then all my devices were
    > seen and seemed to be ok. I just cannot add the 2nd printer.
    >
    > I spoke to an HP rep who insisted that I would never be able to have 2
    > USB printers hooked up because the new motherboards USB ports use
    > power differently and therefore I would not be able to have 2 USB
    > printers hooked up (Mind you both of these printers are USB - no lpt
    > ports). I find this incredibly hard to believe since the new
    > motherboards don't even have LPT ports available and EVERYTHING seems
    > to be going to the USB. What good is having USB devices if you can't
    > have them all plugged in?
    >
    > Tell me this guy didn't know what he was talking about and how I can
    > resolve this issue. And if you're wondering why I have 2 printers, 1
    > is for black & white fast printing (I run a lot of long jobs here) and
    > the other is an all-in-one that I can print color, or scan from.
    >
    > Things I have tried:
    >
    > I swapped power supplies - same problem
    > I took the mobo out and put it on a cardboard box to see if there was
    > a grounding problem - same problem
    > I ran a Windows Repair - same problem
    >
    > The only thing that seems to correct, at least while my 4 devices (not
    > my 2nd printer) the USB not being recognized is shutting down the PC
    > and unplugging it from the power supply then plugging it back in and
    > powering back up.
    >
    > Anyone run into this? If so, has anyone come up with a solution?
    >
    > Thanks
    >
    > Linda
    > .
    >
     
  5. LindaM

    LindaM Flightless Bird

    Thank you to all who posted. And Paul, thank you for your detailed
    explanation. That really clarified a lot of things for me.

    I will try the USB Hub that Paul recommended and I will try shutting
    the one printer off when I install the other printer as was suggested
    by sgopus. It never occurred to me to shut one of them off.

    I will post back if/when I resolve this issue.

    Thanks again for all the advice,

    LInda


    sgopus <sgopus@discussions.microsoft.com> wrote:

    >You can have two usb printers installed at the same time, however you can't
    >have them both on when you are installing another, turn one off and then
    >attempt to install the new one, and as the other posters have said, use a
    >HUB, not the USB ports on the PC directly.
    >Once they are both installed you can select which one is default.
    >
    >"LindaM" wrote:
    >
    >> Hi All,
    >>
    >> I am having an odd problem and don't know if it can be resolved. I
    >> recently built a new machine using ASUS P5G41-M with 4GB RAM, an Intel
    >> Core 2 Duo 3GHz processor, and a 380W PSU, running Windows XP SP3. The
    >> old Machine was an ASUS P5L-VM, with 2GB RAM, an Intel Pentium D
    >> processor, and a 350W PSU, running Windows XP SP3r.
    >>
    >> The problem:
    >>
    >> I set up the following USB devices on the New PC exactly as I had on
    >> the old PC:
    >>
    >> 1) USB Wireless Mouse
    >> 2) Logitech PC Camera
    >> 3) HP Laserjet P2015 Printer
    >> 4) HO Officejet 6310 AIO Printer
    >>
    >> In addition I have now added:
    >>
    >> 5) 500GB Seagate External Hard Drive
    >>
    >> I set up the Laserjet first and made that my default printer. Then I
    >> set up the Officejet All-In-One printer. The first thing I noticed is
    >> the printer made itself the default printer. I literally watched it
    >> change. Then when I tried to print to either printer neither would
    >> print. If I unplug the device and plug it back in I get the message
    >> "windows doesn't recognize the device" and then ANYTHING I plug into
    >> the USB port is not recognized. And some of my other devices are no
    >> longer recognized.
    >>
    >> I finally uninstalled the Officejet and shut down the PC. I actually
    >> unplugged the PC from the power supply and then all my devices were
    >> seen and seemed to be ok. I just cannot add the 2nd printer.
    >>
    >> I spoke to an HP rep who insisted that I would never be able to have 2
    >> USB printers hooked up because the new motherboards USB ports use
    >> power differently and therefore I would not be able to have 2 USB
    >> printers hooked up (Mind you both of these printers are USB - no lpt
    >> ports). I find this incredibly hard to believe since the new
    >> motherboards don't even have LPT ports available and EVERYTHING seems
    >> to be going to the USB. What good is having USB devices if you can't
    >> have them all plugged in?
    >>
    >> Tell me this guy didn't know what he was talking about and how I can
    >> resolve this issue. And if you're wondering why I have 2 printers, 1
    >> is for black & white fast printing (I run a lot of long jobs here) and
    >> the other is an all-in-one that I can print color, or scan from.
    >>
    >> Things I have tried:
    >>
    >> I swapped power supplies - same problem
    >> I took the mobo out and put it on a cardboard box to see if there was
    >> a grounding problem - same problem
    >> I ran a Windows Repair - same problem
    >>
    >> The only thing that seems to correct, at least while my 4 devices (not
    >> my 2nd printer) the USB not being recognized is shutting down the PC
    >> and unplugging it from the power supply then plugging it back in and
    >> powering back up.
    >>
    >> Anyone run into this? If so, has anyone come up with a solution?
    >>
    >> Thanks
    >>
    >> Linda
    >> .
    >>
     

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