Mailinglist Archive: radeonhd (308 mails)

["Alex Deucher" <alexdeucher@xxxxxxxxx>]

On Mon, Mar 17, 2008 at 4:49 PM, Sam Tregar <sam@xxxxxxxxxx> wrote:
> Hey all.  I've got a Thinkpad T60p with a FireGL V5250 card.  I know
>  from using XP on this machine that this a very capable video card.
>  The performance I'm seeing with the radeonhd driver just isn't great -
>  slow scrolling in Firefox is the most obvious problem.
>
>  Right now it appears that I'm using XAA judging by my Xorg.0.log:
>
>    (**) RADEONHD(0): Selected XAA 2D acceleration.
>
>  I've read on this list that XAA is known to be slow and that ShadowFB
>  is better.  So far I can't get ShadowFB to work.  I've added this line
>  to my xorg.conf, in the Device section:
>
>    Option "ShadowFB" "on"
>
>  But I see this in my logs:
>
>   (WW) RADEONHD(0): Option "ShadowFB" is not used
>
>  Can anyone give me any advice on speeding up X with my card?  Am I
>  barking up the wrong tree with ShadowFB?

you want:
Option "AccelMethod" "ShadowFB"

Alex
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