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SubjectRe: Persistent sound hangs (2.0.0 - 2.2.0pre4 tested)
In <m0zxLNP-0007U2C@the-village.bc.nu> Alan Cox (alan@lxorguk.ukuu.org.uk) wrote:
>> Hmmm... what would be the proper part of the kernel to detect buggy ISA
>> chipsets? isa-quirks.c or something? Certainly not pci.c ...

> I dont know a safe way to detect such chipsets unfortunately. PCI chipsets
> you can check when you scan the pci bus, isa/vlb dont have that.

>> Just bugged VIA tech support again... anyone care to bet on the odds of me
>> ever receiving a reply?

> About 99%

>> But if there is a DMA hang bug... *any* ISA device using DMA might hang,
>> right? Even SCSI cards and such?

> It only seems to trip up on certain patterns of DMA and devices - nobody has
> reported floppy problems for example but lots of people have sound problems

As ARVID guys claims there are no problems with 8bit DMA (used by floppy) while
non-working 16bit DMA. That's why ARVID 1031 and up do not use DMA at all ...

This is black list from ARVID documentation:
-- cut --
PC-CHIPS CHIP 5/6 (motherboards M321, M396F)
CDCOM International (really PC-CHIPS 5/6)
PC-CHIPS CHIP 11/12
UMC UM82С48x/UM82C49x
ALI M1419
CITYGATE D110-014/KS83C206Q
FOREX FRX46C521A (may be this is not real FOREX)
CONTAQ 82c596 & 82c206
Intel witch chips: S82426EX & 425 on motherboard PVI-486AP4 (usually
this is Intel Champion)
-- cut --

VIA not listed :-(( BTW ARVID FAQ claims that even floppy does not work on
some MBs with AMD dx4-120 SV8B due incompatibility with WriteBack cache...





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