[ltp] Composite performance with X.org - radeon M9

[Alex Deucher]

On 9/18/05, JP Renaud <jprenaud@emailplus.org> wrote:
> Hello,
>=20
> I've tried to enable composite in X.org (with KDE) on my R51 (Radeon
> Mobile 9000) this w-e. I run X.org 6.8.2 (from Gentoo) and use the
> opensource radeon driver.
>=20
> The display was stunning but unfortunately, it was rather rather
> unusable: X started to use all the CPU. Dragging a window, resizing or
> changing focus between windows would take ages. Basically, it was great
> until you used the keyboard or the mouse...
>=20
> I am thinking on changing to a later version of X.org (a recent CVS
> snapshot packaged by Gentoo I think) to see if the composite
> performance has improved with the radeon driver. Do any of you run
> X.org CVS and could let me know if composite performance has improved
> enough since 6.8.2 to make it usable with a radeon M9?
>=20
> I've also heard about EXA acceleration which is meant to improve things
> quite a bit. Is that true whith radeon cards too?
>=20

yes.  xorg from cvs has exa accel for radeon cards.  note the code is
in development and may not be stable.  exa should speed up composite
operations.

Alex

> My radeon driver options:
>=20
> Section "Device"
>      Identifier  "ATI Mobility Radeon 9000"
>      Driver      "radeon"
>      VendorName  "IBM Thinkpad"
>      BoardName   "ATI Radeon Mobility M9"
>=20
>      Option      "DynamicClocks" "on"
>      Option      "AGPMode" "4"
>  #    Option      "AGPFastWrite" "true"
>  #    Option      "EnablePageFlip" "true"
>      Option      "backingstore"  "true"
>      Option      "RenderAccel"   "true"
> EndSection
>=20
> Enabling "AGPFastWrite" just locks the machine, I can't kill the X
> server and I have to use the power button.
>=20
> I have not tried enabling "EnablePageFlip" yet but I don't know if it
> would help either for composite.
>=20
> Many thanks for your help.
>=20
> JP
>=20
> --
> JP Renaud