Posted on 2004-11-28
I've had to rebuild my PC with a friends motherboard, a A7V266-E, which uses the VIA chipset. I performed the Windows 2000 Professional install and had started patching via windows update when the computer hung. No mouse movement, no task manager, nothing. At first I thought it was Windows Update, however it continued to do this as I progressed with software installation within a period of 10-30 minutes. I found that Stinger.exe would generally cause it to hang.
After further investigation, I discovered that it doesn't hang in safe mode. Then I started looking at the IRQ assignments. The motherboard assigns the IRQs correctly, and they are individually assigned when safe mode is used, but when I load the OS normally all the PCI cards and AGP card is assigned to IRQ 9. What it's assigning is: Video Card (9600XT), Network Card (Realtek), Modem (Dynalink), and ACPI (which is meant to go to IRQ 9).
When I uninstalled the PCI cards and just ran with the video card and ACPI assigned to IRQ 9 it didn't crash. So I think it may be this. However, even if I explicitly assign IRQs via the motherboard, they are still all assigned to 9 on normal boot. Safe mode uses the explicit assignments from the MB, or correctly assigns if I leave it auto.