Changing 945G GPU IRQ assignment

[Justin Piszcz]

Hi,

Aside from changing BIOS options, and enabling/disabling certain hardware 
I am not sure.  It looks like you have already done that.  No USB etc in 
your interrupts file...

Only other thing I would suggest is to see if there are any IRQ-specific 
options in the module itself when load it, e.g.:

modinfo qhal_host
modinfo i915

etc

Justin.

On Wed, 30 Sep 2009, Jacques, Hugo wrote:

> Justin,
>
> No I did not use noapic initially.
>
> I just tried and got the /proc/interrupts hereafter, which still gives me qhal_host and i915 on the same line (IRQ 9)
>
> Would your fix be to enable the CONFIG_PCI_MSI kernel option? I tried it already and it made no difference. Unlike your 965 system, my 945 system doesn't support MSI (see comment in i915_driver_load () from drivers/gpu/drm/i915/i915_dma.c) :(
>
>           CPU0       CPU1
>  0:         35          0    XT-PIC-XT        timer
>  1:          2          0    XT-PIC-XT        i8042
>  2:          0          0    XT-PIC-XT        cascade
>  3:          2          0    XT-PIC-XT
>  4:         11          0    XT-PIC-XT
>  5:          2          0    XT-PIC-XT
>  7:        826          0    XT-PIC-XT
>  9:       7938          0    XT-PIC-XT        acpi, qhal_host, i915 at pci:0000:00:02.0
> 10:          2          0    XT-PIC-XT
> 14:       3872          0    XT-PIC-XT        ide0
> 28:        147          0   PCI-MSI-edge      eth0
> 30:          0          0   PCI-MSI-edge      ahci
> NMI:          0          0   Non-maskable interrupts
> LOC:      14233      14220   Local timer interrupts
> RES:        767        456   Rescheduling interrupts
> CAL:         18         40   Function call interrupts
> TLB:        339        255   TLB shootdowns
> TRM:          0          0   Thermal event interrupts
> SPU:          0          0   Spurious interrupts
> ERR:        826
> MIS:          0
>
> Hugo.
>
> On Wed, 30 Sep 2009, Justin Piszcz wrote:
>
>>
>> Do you boot with noapic?
>>
>> On Wed, 30 Sep 2009, Justin Piszcz wrote:
>>
>>> Hi Hugo,
>>>
>>> I use a DG965 board currently with built-in video and a 3ware card in
>> the x16
>>> slot:
>>>
>>> $ cat /proc/interrupts
>>>           CPU0       CPU1       CPU2       CPU3
>>>  0:       3241          0          0          0   IO-APIC-edge
>> timer
>>>  1:          2          0          0          0   IO-APIC-edge
>> i8042
>>>  8:          1          0          0          0   IO-APIC-edge      rtc0
>>>  9:          0          0          0          0   IO-APIC-fasteoi   acpi
>>> 12:          3          0          0          0   IO-APIC-edge
>> i8042
>>> 16:    4383796   12792529    5711773    5079069   IO-APIC-fasteoi   3w-
>> 9xxx,
>>> uhci_hcd:usb3
>>> 18:      57977      14740          0          0   IO-APIC-fasteoi
>>> ehci_hcd:usb1, uhci_hcd:usb7
>>> 19:      35308      35028          0          0   IO-APIC-fasteoi
>>> uhci_hcd:usb6
>>> 21:      57951   77630159    3692228   99277364   IO-APIC-fasteoi
>>> uhci_hcd:usb4, eth1
>>> 22:     552076    6937190   17079516   15588018   IO-APIC-fasteoi   HDA
>>> Intel, eth2
>>> 23:    3448429   13678957          0          0   IO-APIC-fasteoi
>>> ehci_hcd:usb2, uhci_hcd:usb5
>>> 30:     455701     209453          0          0   PCI-MSI-edge
>>> i915 at pci:0000:00:02.0
>>> 31:     861003    3495076       9393    3194492   PCI-MSI-edge      ahci
>>> 32:    2621566   20858202    5466083   85380656   PCI-MSI-edge      eth0
>>>
>>> If you play around with the kernel options, I believe there is an option
>> to
>>> move things around so it goes onto its own IRQ (the graphics card).  I
>> will
>>> see if I can remember what it was, I had the same issue, i915 was on the
>> same
>>> IRQ as the 3ware card I believe.  I do not recall off-hand which option
>> it
>>> was.
>>> Will take a look and report back if I find anything.
>>>
>>> Justin.
>>>
>>>
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