In Reply to: Re: USB and IRQ problems - HELP! posted by Bill D. on 09/27/02 at 12:34 AM:
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*.
: : 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