In Reply to: Re: USB and IRQ problems - HELP! posted by Bill D. on 09/27/02 at 12:35 AM:
Forgot to tell you - I don't have WinXP, I have Windows 2000.... and the USB ports are built into the motherboard, I don't have a separate USB port card.
ALso, here's the problem. you said this:
": : 7. Lastly, remove the drivers for the devices sharing the IRQ with the host controller. Windows should reinstall the drivers automatically."
the problem is that I have TWO devices on IRQ 9. they are:
Microsoft ACPU-Compliant System and
Intel 82801BA/BAM SMBus Controller - 2443
And this device is by itself on IRQ 19:
Intel 82801BA/BAM USB Universal Host Controller -2442
THAT one appears to be the USB driver, and I'm not sure what the SMBus Controller is. Anyway - I tried to remove the Microsoft ACPU-Compliant System, and it uninstalled ALL of my device drivers! not good....
So I'm not sure what to get rid of at this point, and if that will even help my UAB situation....
Does this clear it up at all? I really appreciate the help...
: Bythe way, IRQ-sharing in WinXP is usually not the problem. If you are still having problems, try another card. If no joy, reinstall Windows from scratch with all USB devices unplugged.
: : This is not a small issue. What is?
: : You cannot manually assign IRQs in Windows. You can only help Windows make the right decision by freeing other IRQs.
: : 1. Note if any devices are sharing the IRQ with the USB host controller. Look in System Information > Hardware resources > IRQs.
: : 2. Boot to BIOS setup (press Del, F1, or F10 at initial boot) and disable ACPI in the Power Management section.
: : 3. Go to the "Integrated Peripherals" section and disable one or both serial (Com) ports if you are not using them.
: : 4. Go to the "PnP/PCI" section and enable "PnP OS", "Auto" and "Reset Configuration Data". The last is a momentary switch and will be disabled each time you return here. It releases the BIOS lock on IRQs and lets Windows take over and is VERY important.
: : 5. Boot DIRECTLY to Windows Safe Mode (continue booting and press F8 repeatedly to get the boot menu) and unplug any USB devices. Remove all USB software in Add/Remove Programs. Open Device Manager. Remove the USB root hub and host controller *in that order*. Remove all USB drivers. Look for duplicate or erroneous drivers and *remove them all*. Windows will reinstall genuine devices.
: : 6. If you have any SB16 emulation drivers, disable them in the hardware profile (do not remove). These are DOS sound drivers and most don't need them.
: : 7. Lastly, remove the drivers for the devices sharing the IRQ with the host controller. Windows should reinstall the drivers automatically.
: : At this point you have freed up 2 or 3 IRQs and reset Windows IRQ assignments. You can reboot and reinstall your devices *as per manufacturer's instructions*.
: : Bill
: : : This is really a continuation of an earlier post on this board....
: : : I can NOT get the USB 2.0 driver to install correctly on my Win2000 machine. I have uninstlled and installed a million times,still no luck..
: : : below is the message OI received Jeff from
: : : "Make sure USB is properly Enabled in the BIOS (Assign IRQ for USB, Legacy USB and/or USB keyboard Enabled. Check for an IRQ sharing violation in Accesoroes > System Tools > Hardware > Conflicts and Sharing. You may also have multiple devices installed Check in Add/Remove Hardware > Uninstall > Uninstall > Show Hidden Devices.
: : : Jeff"
: : : Here's the problem - I can SEE the IRQ 9 is in sharing violation. I'm trying to figure out how you manually assign the IRQ resources. I just can't find it....
: : : PLEEEESE help with this very small issue