Re: cx88 pci_abort messages

[Robert Hancock <hancockr@shaw.ca>]

Scott wrote:
> On Oct 4, 2007, at 11:52 AM, Scott wrote:
>
> > I'm having what I think is a PCI bus problem.
> >
> > I have a ASUS P5B Intel 965 motherboard and a DVICO Fusion HDTV5 RT
> > adapter on the PCI bus. When this adapter is recording (anything) I see
> > pci_abort messages repeating in the /var/log/messages file. As a result
> > I see some minor video corruption during playback. I've installed the
> > adapter into a PCI slot that shares an IRQ with the onboard USB.
> > However, I've also disabled all USB support in BIOS, so the adapter is
> > the only thing on the IRQ, and still see the same errors.
> >
> > Any suggestions for further troubleshooting? Is this a PCI bus quirk on
> > this motherboard? A copy of my .config is at
> > http://donpoo.net/kernel_config
> >
> > Oct  2 21:59:12 htpc cx88[0]: irq mpeg  [0x80000] pci_abort*
> > Oct  2 21:59:12 htpc cx88[0]/2-mpeg: general errors: 0x00080000
> > Oct  2 21:59:20 htpc cx88[0]: irq mpeg  [0x80000] pci_abort*
> > Oct  2 21:59:20 htpc cx88[0]/2-mpeg: general errors: 0x00080000
> > Oct  2 21:59:32 htpc cx88[0]: irq mpeg  [0x80000] pci_abort*
> > Oct  2 21:59:32 htpc cx88[0]/2-mpeg: general errors: 0x0008000
>
> I was poking around the PCI bus with setpci/lspci last night and tried 
> adjusting the latency from 64 to 32. This didn't make a difference. I 
> also changed my core2duo speedstep governor from ondemand to performance 
> to prevent the CPUs from changing speed. I eventualy saw the same 
> pci_abort message but I might have seen less of them.
>
> Is there a way to log every device pci device that throws an interrupt? 
> I'm thinking if I could find out which pci device was stealing the 
> interrupt that I could disable it or look at the code and see what it 
> was doing.

PCI aborts won't have anything to do with interrupts. It's a PCI DMA 
transfer that either the initiator (here, the TV card) or the target 
(the chipset host bridge) decided to puke on for some reason. Possibly 
parity errors?

--
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

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