USB root hub missing

Hi,

I have an Asus P2B-S and suddenly, my USB 1.1 onboard ports are not
working. Device manager shows only USB Host Controller, but no Root
Hub.

Any clue to solve this issue? How could I restore it?

:-(

P.S. BIOS rev. is 1011 and USB ports were working until yesterday.
O.S. intalled is Windows 2000 server

Elsa wrote:
Hi,

I have an Asus P2B-S and suddenly, my USB 1.1 onboard ports are not
working. Device manager shows only USB Host Controller, but no Root
Hub.

Any clue to solve this issue? How could I restore it?

Remove the USB controller(s), then scan for hardware changes or reboot.

Ben
--
I'm not just a number. To many, I'm known as a String...

"Ben Pope" wrote in message ...

Remove the USB controller(s), then scan for hardware changes or reboot.

Ben

Hello Ben,

That did not work. I have tried removing all devices from USB ports
and unistalling any related software. Also, tried by removing the USB
controller in Windows Safe Mode with no sucess.

Any idea?

Thanks.

Elsa wrote:
"Ben Pope" wrote in message
...

Remove the USB controller(s), then scan for hardware changes or reboot.

Ben

Hello Ben,

That did not work. I have tried removing all devices from USB ports
and unistalling any related software. Also, tried by removing the USB
controller in Windows Safe Mode with no sucess.

Any idea?

Only that the device must already be installed, possibly as an unknown
device, but that seems unlikely.

Ben
--
I'm not just a number. To many, I'm known as a String...

Hi Elsa,

Have you added any devices or software to the system recently ? If so try
removing them.
Try going into the bios and checking that the devices are still enabled. A
dead battery or system glittch may have dissabled them. Do the USB devices
still show up at post time and have IRQs assigned to them ?

A lising of your system components is always helpful including
motherboard, video card any onboard devices that are enabled and any
expansion cards that are in the system.
Knowing which slot cards are plugged into and what IRQ's all the devices
are using is also helpful.




"Elsa" wrote in message
om...
"Ben Pope" wrote in message
...

Remove the USB controller(s), then scan for hardware changes or reboot.

Ben

Hello Ben,

That did not work. I have tried removing all devices from USB ports
and unistalling any related software. Also, tried by removing the USB
controller in Windows Safe Mode with no sucess.

Any idea?

Thanks.

"Ben Pope" wrote in message

Only that the device must already be installed, possibly as an unknown
device, but that seems unlikely.

Ben

Hi again,

Uhmm, USB ports are death, nothing I can attatch to them is recognized
by Windows 2000... Can USB ports be completely death? I was looking in
this group and saw some posts regarding P2B motherboards that missed
their USB capability due to a bug of port voltage.

Can I restore USB? How?

Elsa wrote:
"Ben Pope" wrote in message


Only that the device must already be installed, possibly as an unknown
device, but that seems unlikely.

Ben

Hi again,

Uhmm, USB ports are death, nothing I can attatch to them is recognized
by Windows 2000... Can USB ports be completely death? I was looking in
this group and saw some posts regarding P2B motherboards that missed
their USB capability due to a bug of port voltage.

Can I restore USB? How?


I take it that there aren't any unknown devices in device manager then?

Sounds like all you gotta do is get windows to detect the root hub. Without
the root hub PnP will not work, and thats why the hardware you plug into the
ports don't get detected.

It's pretty unlikely for the USB ports to fail under normal use, I think
it's purely a configuration / software thing.

Ben
--
I'm not just a number. To many, I'm known as a String...

"Ben Pope" wrote in message ...

I take it that there aren't any unknown devices in device manager then?

There are not any unknown devices in device manager. In Universal
serial bus controllers is only one entry:

Universal Host Controller PCI to USB Intel 82371AB/EB

Sounds like all you gotta do is get windows to detect the root hub. Without
the root hub PnP will not work, and thats why the hardware you plug into the
ports don't get detected.

It's pretty unlikely for the USB ports to fail under normal use, I think
it's purely a configuration / software thing.

Ben

O.K. I think so. But how can I tell Windows 2000 to re-detect the root
hub? Adding new hardaware wizard does not work...

¿?

"Jim" wrote in message news:okLyb.184342$Dw6.705886@attbi_s02...

Hi Elsa,

Have you added any devices or software to the system recently ? If so try
removing them.

No, I have not any hardware neither software related to USB. System is
now USB clean.

:-)

Try going into the bios and checking that the devices are still enabled. A
dead battery or system glittch may have dissabled them. Do the USB devices
still show up at post time and have IRQs assigned to them ?
A lising of your system components is always helpful including
motherboard, video card any onboard devices that are enabled and any
expansion cards that are in the system.
Knowing which slot cards are plugged into and what IRQ's all the devices
are using is also helpful.

9 Microsoft system compatible with ACPI
9 Matrox Millennium G550
9 Universal host controller PCI to USB Intel 82371AB/EB
9 Adaptec controller AHA-2940U2/U2W PCI SCSI
9 Adaptador Fast Ethernet OvisLink LFE-8139ATX
9 Creative SB Live! Basic (WDM)
8 CMOS/clock real time
13 Numerical data processor
6 Standard diskette controller
4 Communications port (COM1)
3 Communications port (COM2)
1 Standard keyboard of 101/102 keys or Microsoft Natural PS/2 Keyboard
12 Mouse compatible PS/2
14 First IDE channel
15 Second IDE channel

Two notes:
1. Names are translated from spanish into english, so may vary
2. Yes, I know there are many devices with the same IRQ (thanks to
ACPI) but I have no problem with this.

Any advice is appreciated.

Elsa wrote:
O.K. I think so. But how can I tell Windows 2000 to re-detect the root
hub? Adding new hardaware wizard does not work...

Dunno - it's a very strange one. Try changing the driver to something else
and then back, see if that helps.

Ben
--
I'm not just a number. To many, I'm known as a String...