Changing 945G GPU IRQ assignment

[Jacques, Hugo]

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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