From: Mike Fedyk <mfedyk@matchmail.com>
To: frahm@irsamc.ups-tlse.fr
Cc: c-d.hailfinger.kernel.2003@gmx.net, linux-kernel@vger.kernel.org
Subject: Re: 2.4.21-rc5: DMA disabled for IDE Cdrom, works with 2.4.20
Date: Tue, 27 May 2003 17:29:45 -0700 [thread overview]
Message-ID: <20030528002945.GD23651@matchmail.com> (raw)
In-Reply-To: <200305280003.h4S03q4L000448@albireo.free.fr>
On Wed, May 28, 2003 at 02:03:52AM +0200, frahm@irsamc.ups-tlse.fr wrote:
> I have now disabled "CONFIG_IDEDMA_PCI_AUTO" such that initially DMA is
> disabled for /dev/hda and /dev/hdb. I have then enabled DMA only for
> /dev/hdb with hdparm (keeping DMA disabled for /dev/hda) but the problem
> persists and DMA for /dev/hdb will be disabled when I try to mount a
> cdrom. It seems that the DMA-setting for /dev/hda has no influence on
> this.
Try using hdparm -d1 -X34 on /dev/hda and /dev/hdb
This will turn on DMA and use the same DMA mode for both devices. I
wouldn't be surprised if the new IDE was more strict (maybe more spec
compliant?) than the previous version.
next prev parent reply other threads:[~2003-05-28 0:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-27 21:33 frahm
2003-05-27 22:43 ` Carl-Daniel Hailfinger
2003-05-28 0:03 ` frahm
2003-05-28 0:29 ` Mike Fedyk [this message]
2003-05-28 9:01 ` frahm
2003-05-29 7:56 ` Kristian Peters
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