[Bug 39432] Cannot activate dma on hard drive

[neu]

Public bug reported:

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
With kernel 2.6.12-10 and 2.6.15-20 (and probably others), I am not able
to enable DMA on my hard drive.

$ sudo hdparm -d1 /dev/hda

/dev/hda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)


With a vanilla kernel from kernel.org (2.6.15.7),  hard drive DMA works like it should.

I have a Intel Corporation 82440MX EIDE Controller (8086:7199)
interface, and the piix module is loaded.
-- 
Cannot activate dma on hard drive
https://launchpad.net/malone/bugs/39432