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-   -   DMA Problems (https://www.linuxquestions.org/questions/slackware-14/dma-problems-235049/)

gamehack 09-25-2004 07:49 AM
DMA Problems
 
Hello all :)

When booting into linux I receive a warning that my DMA is not enabled.If I try to enable it, it gives me:
Code:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
Although DMA IS enabled in the kernel. I have read this thread about the same problem, but it doesn't help me....

Thanks to all

amosf 09-25-2004 08:40 AM
Are you sure you have the correct DMA chipset compiled?

carboncopy 09-25-2004 08:41 AM
DMA being disabled by kernel is not by chance (that is what I learned, the hardway).

I had my harddisk DMA disabled by kernel after it complained about checksum error. After much debuging, I concluded it was my PCI-IDE 133 card which was causing the problem.

What I am trying to say is, you may have hardware problem. Some how the Linux kernel is more sensitive or do a good checkup while booting up. Windoze does not catch the problem and went ahead with enabling the DMA(6). As the name suggest, probably it was dozing.

gamehack 09-25-2004 09:13 AM
Under 2.4.27 it works perfectly.
@amosf

How can I see if it's the right?

amosf 09-25-2004 09:26 AM
Did you compile yourself or is this with the binary install?

Do you know what chipset your MB has and so forth?

gamehack 09-25-2004 10:02 AM
I compiled it myself. I think I managed to see the chipset with the lspci command. Because now I'm going away, tomorrow I will post the result.

Cheers


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