From: Robert Hancock <hancockrwd@gmail.com>
To: discord@u.washington.edu
Cc: linux-ide@vger.kernel.org
Subject: Re: no dma support dvd-rom toughbook cf-y5 ata_piix
Date: Fri, 12 Jun 2009 00:54:39 -0600 [thread overview]
Message-ID: <4A31FBAF.8010605@gmail.com> (raw)
In-Reply-To: <1244700488.4142.3.camel@crystal>
On 06/11/2009 12:08 AM, Colin Williams wrote:
> I filed a bug on ubuntu launchpad
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/357531.
>
> Is it indeed a bug? Is their some kind of module flag or patch? Is their
> a way to enable dma on my dvd-rom? I'd love to watch dvd's on my laptop
> can one of module developers give me some insight?
Doesn't look like the DVD-ROM is connected via PATA or SATA, looks like
it's actually connected via a USB connection internally? That seems a
bit bizarre.. Can you do a lsusb to verify if that's the case?
If it is, then the kernel doesn't have any control over the DMA state of
the drive, as that's purely under control of the USB-to-ATA bridge chip
they're presumably using.
prev parent reply other threads:[~2009-06-12 6:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-11 6:08 no dma support dvd-rom toughbook cf-y5 ata_piix Colin Williams
2009-06-12 6:54 ` Robert Hancock [this message]
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