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Subjectlockups from heavy IDE/CD-ROM usage

I've been experiencing this problem for a long time now (it occured even
in 2.2, and now in 2.4), but its Areally starting to bother me so i
thought i'd better post it here and see what you people have to say.

Problem: When i am using my harddrive and cdrom, my computer will freeze.
It freezes in two different ways.. sometimes just the harddrive access
will freeze (can still do things in X as long as they dont require the
harddrive), and then everything freezes within a few seconds. or else
everything just locks instntly. the problem is reproducable, all i need to
do is be using the harddrive extensively for a couple separate functions
(like compiling the kernel, and copying a large file) and ripping cd audio
(cd paranoia) and i can lock the system in as little as seconds, or a few
minutes sometimes. This will happen more reliably, and much quicker and
easier when i have dma enabled, but still occurs when it is not enabled. I
have used hdparm to turn off any features on the drives, but to no avail.
And i do not receive any log messages before the computer locks. Im sure
the problem is not solely hardware, because in m$ windows, i have no
problems with dma or lockups like this.

My Hardware:
CPU: Athlon K7 750
Motherboard: Abit KA7
Chipset: VIA VT8371(KX133) /VIA 686A
Harddrive: FUJITSU MPE3273AT
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 3322/255/63, sectors = 53377152, start = 0
HDIO_GET_MULTCOUNT failed: Input/output error
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
HDIO_GET_NOWERR failed: Input/output error
readonly = 0 (off)
BLKRAGET failed: Input/output error
HDIO_GETGEO failed: Invalid argument

I am NOT overclocking my computer either :-) im not sure what other info i
can give you about this problem.. any pointers would be greatly

O, one thing, i do remember hearing somewhere that the VIA KX133 chipset
had flaw(s) in it, which were fixed in the KT133 chipset. Maybe we could
get a workaround for those flaws (if they exist). Does anyone have a KX133
or KT133 chipset and have dma working?

Hope we can get this ironed out :)

thanks in advance

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