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    SubjectRe: Why my computer freeze completely with xawtv ?
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    Date
    Grzegorz Kulewski <kangur@polcom.net> writes:

    > I am seeing the same problem with my bttv card. It was present in the
    > 2.4 day and is present to this day. There are some kernels that are
    > more probable to hang while others are less. It does not depend on -ck
    > or any other patchset or scheduling. I reported it to bttv maintainer
    > year or two ago, but it looks like he is very unresponsive. :-)

    Well, if it happens almost independant of the kernel/driver version it
    most likely is buggy hardware. I can't do much about it ...

    Well known example are some via chipsets which have trouble with
    multiple devices doing DMA at the same time (those tend to run stable
    with bttv once you've turned off ide-dma ...).

    Getting broken hardware run stable and fast is black magic. You can
    try these (if that happens to help we can put that info into the pci
    quirks btw.):

    eskarina kraxel ~# modinfo bttv | grep "pci config"
    parm: vsfx:set VSFX pci config bit [yet another chipset flaw workaround]
    parm: triton1:set ETBF pci config bit [enable bug compatibility for triton1 + others]

    Otherwise BIOS updates, obscure BIOS settings, shuffling cards in PCI
    slots, enable/disable ACPI and/or APIC, whatelse may or may not help.

    See also Documentation/video4linux/bttv/README.freeze

    good luck,

    Gerd

    --
    #define printk(args...) fprintf(stderr, ## args)
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