xorg xcomposite and ati

[Werner Punz]

Hi
I am currently trying x.org (the funny thing is I was able to merge it 
into my Debian testing from the hoary repository and it works stable and 
fast)

I am trying the xcomposite and transset programs on it.
Works fine, but what I noticed (standard Radeon 5200)
that bigger Windows, Windows resizing and generally transparency brings 
the system to a crawl.

I cannot find any bug in my config file here are the relevant entries:

Section "Module"
	Load	"GLcore"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Load	"dri"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
EndSection
....
Section "Device"
	Identifier	"Standardgrafikkarte"
	Driver		"radeon"
	BoardName    "Radeon LW"
    	VendorName   "ATI"
    	BusID        "1:0:0"
    	Screen       0
	Option "AGPMode" "4"
	Option      "backingstore" "true"
#	Option "MergedFB" "true"
#	Option "CRT2HSync" "31.5 - 80.5"
#	Option "CRT2VRefresh" "60 - 75"
#	Option "CRT2Position" "RightOf"
#	Option "MetaModes" "1280x1024-1280x1024 1024x768-1024x768 
800x600-800x600 640x480-640x480
EndSection
...

Section "Screen"
	Identifier	"Screen0"
	Device		"Standardgrafikkarte"
	Monitor		"AT1099DA-1"
	DefaultDepth	16
	SubSection "Display"
		Depth		1
		Modes		"1280x1024" "1024x768" "800x600" "640x480"
	EndSubSection
	SubSection "Display"
		Depth	
.......

And so on, there are no significant errors, xcomposite and transset do 
what they are supposed to do, but transparency and window resizing as 
well as big windows (mainly konqueror opened up fully) bring the window 
movement actions to a crawl. Smaller windows work as expected.
Running on hoary x.org 6.8.1 here. I assume the ATI drivers still have 
some problems with the composite extensions in this regard.
Am I right?

Kind regards

Werner Punz