Su un desktop ho la sfortuna di avere una scheda grafica ATI:

lspci

codice:
01:05.0 VGA compatible controller: ATI Technologies Inc RC410 [Radeon Xpress 200]
Utilizzando i driver di xserver-xorg-video-ati, al comando:

compiz --replace

mi appare un bello schermo bianco.

Sparando l'output su un file riesco almeno a leggere:

codice:
Checking for Xgl: not present. 
Detected PCI ID for VGA: Flags: bus master, VGA palette snoop, 66MHz, medium devsel, latency 64
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: present. 
Comparing resolution (1280x1024) to maximum 3D texture size (2048): Passed.
Checking for nVidia: not present. 
Checking for FBConfig: present. 
Checking for Xgl: not present. 
Starting gtk-window-decorator
Sistema: Debain Lenny, kernel 2.6.24.1

Sapete indicarmi il motivo?

Il mio xorg.conf:

codice:
Section "Files"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"kbd"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xorg"
	Option		"XkbModel"	"pc105"
	Option		"XkbLayout"	"it"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
EndSection

Section "Device"
	Identifier	"ATI Technologies Inc RC410 [Radeon Xpress 200]"
	Driver		"ati"
	#Driver 		"fglrx"
	BusID		"PCI:1:5:0"
	Option "AddARGBGLXVisuals" "true"
	Option "AllowGLXWithComposite" "true"	    
	Option "XAANoOffscreenPixmaps" "true"
	Option "RenderAccel" "true"
EndSection

Section "Module"
	Load "dri"
	Load "dbe"
	Load "glx"
EndSection

Section "Monitor"
	Identifier	"SAMTRON"
	Option		"DPMS"
	Horizsync	60-75
	Vertrefresh	60-75
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"ATI Technologies Inc RC410 [Radeon Xpress 200]"
	Monitor		"SAMTRON"
	DefaultDepth	24
	SubSection "Display"
		Modes		"1280x1024" 
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	Option "AIGLX" "true"
EndSection

Section "DRI"
	Mode 0666
EndSection

Section "Extensions"
	Option "Composite" "Enable"
	Option "RENDER" "true"
        Option "DAMAGE" "true"	    
EndSection