Re: How do I turn on DMA for ide-scsi DVD drives

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Message: 1
Date: Mon, 04 Feb 2008 21:03:07 -0500
From: Ric Moore <wayward4now@xxxxxxxxx>
Subject: Re: How do I turn on DMA for ide-scsi DVD drives
To: For users of Fedora <fedora-list@xxxxxxxxxx>
Message-ID: <1202176987.1182.80.camel@xxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain

On Mon, 2008-02-04 at 08:04 -0800, spmirowski wrote:
Alan Cox wrote:
On Wed, 30 Jan 2008 19:37:36 -0800
spmirowski <spmirowski@xxxxxxx> wrote:

Hello,

Back when Fedora handled disc drives as ide, I would use hdparm to turn on DMA. Now that Fedora 8 seems to run them as SCSI devices, hdparm can't tell them to turn on DMA. Any ideas how to get them blazing fast again?
Its always done automatically by libata.

Alan

Thanks,

It would appear the issue wasn't DMA, but nvidia-config omitted something from my xorg.conf that allows hardware acceleration for XVideo.

... and that was? Inquiring minds would like to know! :) Ric

The appropriate method would have been to make one change at a time in the conf and test, but I didn't want to spend that amount of time on it =P My guess is the fix was in Section "Module".

Here nvidia-config only puts "Load "glx"". In a prior working xorg.conf I had

Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection

At least one of those Loads is for the composite graphics, but I can't remember which one.


The following was mainly for composite and extra features, thus I wouldn't expect these to
be part of the fix:

Section "ServerFlags"
Option "AIGLX" "on"
EndSection

and

Section "Extensions"
Option "Composite" "Enable"
EndSection


From Section "Screen" to Section "Device" I moved:

Option "RandRRotation" "True"
Option "RenderAccel" "True"

and added to Section "Device":

Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"

for composite.


Stephen




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