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How I deal with linux agp interrupt problem on A7N8X-E

My box use asus motherboard[a7n8x-e] with asus agp card[n6200d]. Yes, it work great on windows but A7N8X-e acpi bios or acpi module on linux bring me a lot of problem.
I can't remember how many attempts I try to get nvidia linux driver work with a7n8x-e and n6200td card. Every time I try will end with 
(EE) NVIDIA(0): The NVIDIA kernel module does not appear to be receiving
(EE) NVIDIA(0): interrupts generated by the NVIDIA graphics device.
(EE) NVIDIA(0): Please see the FREQUENTLY ASKED QUESTIONS section in the
(EE) NVIDIA(0): README for additional information.
(EE) NVIDIA(0): Failed to initialize the NVIDIA graphics device!
(EE) NVIDIA(0): *** Aborting ***
(II) UnloadModule: "nvidia"
(EE) Screen(s) found, but none have a usable configuration.

Xwindow go to black screen. This error, from faq and in my understand, is dealing with agp interrupts and the answer(w/o any bios update from asus) should be something between
acpi=off
noapic
pci=biosirq 
pci=noacpi
irqpoll

After some experimental in combine those params I found irqpoll is require to take care of agp interrupts and acpi=off give me minimal ERR.

Here is the result when boot with acpi=off and irqpoll parameter.
pnix@pnix-a7n:~$ cat /proc/interrupts
           CPU0       
  0:      18977    XT-PIC-XT        timer
  1:         69    XT-PIC-XT        i8042
  2:          0    XT-PIC-XT        cascade
  3:        532    XT-PIC-XT        NVidia nForce2
  5:         74    XT-PIC-XT        eth0, ohci_hcd:usb3
  6:          5    XT-PIC-XT        floppy
  7:     100030    XT-PIC-XT        ohci_hcd:usb1, nvidia
  8:          3    XT-PIC-XT        rtc
  9:          3    XT-PIC-XT        ohci1394
 10:          0    XT-PIC-XT        MPU401 UART
 11:       6229    XT-PIC-XT        ehci_hcd:usb2, libata
 12:       1088    XT-PIC-XT        i8042
 14:        116    XT-PIC-XT        ide0
 15:        269    XT-PIC-XT        ide1
NMI:        354 
LOC:      18861 
ERR:         53
MIS:          0
pnix@pnix-a7n:~$ cat /proc/driver/nvidia/cards/0
Model:           GeForce 6200
IRQ:             7
Video BIOS:      05.44.a2.03.00
Card Type:       AGP
DMA Size:        32 bits
DMA Mask:        0xffffffff
pnix@pnix-a7n:~$ cat /proc/driver/nvidia/agp/status
Status:          Enabled
Driver:          AGPGART
AGP Rate:        8x
Fast Writes:     Disabled
SBA:             Enabled
pnix@pnix-a7n:~$


Still has some error. Look like nvidia share interrupt with usb controller. Anyway I test all six usb ports and it work, for Xwindow, gdm start fine, so I think it's good to have graphic driver. That's mean no more nv driver, Full video acceleration.:D
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