Не работает DRI на Dual Head конфигурации

Видеокарта с двумя выходами: VGA и DVI. Сконфигурировал иксы на работу с двумя мониторами. При работе в DualHead режиме не работает DRI. Может кто сталкивался?
Лог:

(EE) AIGLX: Screen 0 is not DRI capable
(II) Loading local sub module "GLcore"
(II) LoadModule: "GLcore"
(II) Loading /usr/lib/xorg/modules/extensions/libGLcore.so
(II) Module GLcore: vendor="X.Org Foundation"
        compiled for 7.1.1, module version = 1.0.0
        ABI class: X.Org Server Extension, version 0.3
(II) GLX: Initialized MESA-PROXY GL provider for screen 0
(EE) AIGLX: Screen 1 is not DRI capable
(II) GLX: Initialized MESA-PROXY GL provider for screen 1

Конфиг иксов:

Section "Files"
	RgbPath      "/usr/share/X11/rgb"
	ModulePath   "/usr/lib/xorg/modules"
	ModulePath   "/usr/lib/opengl/xorg-x11"
	FontPath     "unix/:-1"
EndSection

Section "Module"
	Load  "extmod"
	Load  "dbe"
	Load  "record"
	Load  "xtrap"
	Load  "dri"
	Load  "drm"
	Load  "freetype"
	Load  "type1"
	Load  "glx"
EndSection

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

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option      "XkbModel" "pc105"
	Option      "XkbLayout" "us,ru(winkeys)"
	Option      "XkbOptions" "grp:lwin_toggle,grp:rwin_switch,grp_led:scroll"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/psaux"
	Option	    "Buttons" "9"
	Option	    "ZAxisMapping" "6 7 4 5"
EndSection

Section "Monitor"
	Identifier   "BenqMon"
	VendorName   "BNQ"
	ModelName    "BenQ FP93GX"
	HorizSync    31.0 - 83.0
	VertRefresh  56.0 - 76.0
	Option      "DPMS"
EndSection

Section "Monitor"
	Identifier   "SamMon"
	VendorName   "SAM"
	ModelName    "S/M 755DF"
	HorizSync    30.0 - 85.0
	VertRefresh  50.0 - 160.0
	Option      "DPMS"
EndSection

Section "Device"
	Identifier	"Screen0 Radeon"
	Driver		"radeon"
	BusID		"PCI:2:0:0"
	Option     	"RenderAccel" "on"
	Option     	"AGPMode" "4"
	Option     	"AGPFastWrite" "on"
	Screen		0
EndSection

Section "Device"
	Identifier	"Screen1 Radeon"
	Driver		"radeon"
	BusID		"PCI:2:0:0"
	Option     	"RenderAccel" "on"
	Option     	"AGPMode" "4"
	Option     	"AGPFastWrite" "on"
	Screen		1
EndSection

Section "Screen"
	Identifier	"Screen0"
	Device		"Screen0 Radeon"
	Monitor		"BenqMon"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"1280x1024" "1280x960" "1024x768" "800x600" "640x480"
	EndSubSection
        SubSection "Display"
                Depth           16
                Modes           "1280x1024" "1280x960" "1024x768" "800x600" "640x480"
        EndSubSection
EndSection

Section "Screen"
	Identifier	"Screen1"
	Device		"Screen1 Radeon"
	Monitor		"SamMon"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"1024x768" "1280x960" "800x600" "640x480"
	EndSubSection
        SubSection "Display"      
                Depth           16
                Modes           "1024x768" "1280x960" "800x600" "640x480"
        EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"DefaultLayout"
	Screen		"Screen0"
	InputDevice	"Keyboard0"
	InputDevice	"Mouse0"
EndSection

Section "ServerLayout"
	Identifier	"XineramaLayout"
	Screen		"Screen0"
	Screen		"Screen1" LeftOf "Screen0"
	InputDevice	"Keyboard0"
	InputDevice	"Mouse0"
	Option		"Xinerama" "true"
EndSection

Section "ServerLayout"
	Identifier	"DualHeadLayout"
	Screen		"Screen0"
	Screen		"Screen1" LeftOf "Screen0"
	InputDevice	"Keyboard0"
	InputDevice	"Mouse0"
EndSection

Section "ServerFlags"
	Option		"DefaultServerLayout"	"DualHeadLayout"
	#Option         "DefaultServerLayout"   "DefaultLayout"
	#Option         "DefaultServerLayout"   "XineramaLayout"
EndSection

Section "DRI"
	Mode         0666
EndSection