DMA Problems

gamehack · 09-25-2004, 07:49 AM

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