DMA interaction causes lockup under 2.0.32?

Don Fisher (dfisher@as.arizona.edu)
Wed, 03 Dec 1997 23:50:03 +0000

I have been working on a driver for a DT3155 video frame
grabber. The driver would lock up my machine after a few
seconds of operation (power switch type lockup). The
problem was eliminated by turning off the DMA (hdparm) on my
IDE disk drives.

Any ideas on if the problem is most likely with the
hardware, controller firmware or driver software?

System is RedHat 4.9 with unpatched 2.0.32 kernel. Board is
ASUS TXP4 with an Intel 430TX PCI chipset. Frame grabber is
Data Translation DT3155.

Thanks in advance
don

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