Re: USB 2.0 - All devices don't initiate

Bill Drake wrote:

Blackdog wrote:

I have an Asus P4S800 MB and several USB 2.0 devices (like the
Alcatel DSL modem, a cordless logitech mouse and a logitech
webcam).

My MB supports USB  2.0 (in the device manager I have the
enhanced host controlers). The OS is Windows XP Pro Portuguese
edition with SP2.

The problem is that all the usb devices don't work when I restart the
windows. in the device manager it says that the device can't iniciate
(code 10). If I unplug the device and plug it again in another port
(for example if I exchange the usb ports of the modem and the
webcam) it works fine, until the next time I turn off the pc and restart
the OS. So every time I turn the computer on I have to unplug all the
USB devices, otherwise the windows will take 15 minutes to start and
none of the devices will initiate.

Please, can someone please help me with this matter? Thanks in
advance =)



There are some known problems with USB2 instantiation that occur
when USB2 drivers are updated by Windows Updates.  The problems
manifest as unstable operation where USB2 port hardware "looks" like
USB1 port hardware at startup -- and thus the devices don't properly
instantiate in the desired operational mode.



<snip>


3. The first step is to ensure you are using the latest motherboard BIOS.
    The Plug-'n-Play managers in many of the older BIOS versions do
    *not* properly instantiate the USB2 ports in real mode before WXP
    starts up.

    As a result, it is impossible for the PnP manager to correctly
    enumerate the capabilities of the attached devices and report to the
    BIOS as to the capabilities of those devices.

    Consequently, the BIOS is "blind" to the boot-parameters of external
    Hard Disks, mice, keyboards  and so on -- and therefore these
    devices simply don't function properly in DOS mode.

    The only proper fix for this is a BIOS update -- and this is the
    *absolute foundation requirement* for trouble free mixed USB1/2
    device operation with multiple devices attached to multiple USB ports.


<snip>

Bill,

I would not recommend updating the BIOS unless it can be verified that the update specifically fixes the problem. I suggest you ammend your otherwise very good instructions to state that one should check their BIOS version, compare it to available BIOS updates and investigate whether or not the an update will correct a USB 2.0 issue before they consider flashing the BIOS. Needlessly updating a system BIOS is not really worth the risk, IMO.

Steve
.

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