Switching VT takes very long?

[Łukasz Mierzwa]

Hi there,

I have gentoo running on Acer 5024 laptop with ATI X700 Mobility and 
xf86-drivers-ati 6.6.192, when switching VT (or starting X) it takes about 17 
seconds to show anything on screen, first 15 seconds screen is black, no 
backlight active, next 2 seconds screens gets backlight and my kdm starts.
Did I missed anything in my config? Do anyone have this issue?

-- 
Łukasz Mierzwa
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Section "ServerLayout"
	Identifier     "Server Layout"
	Screen         "Screen0" 0 0
	InputDevice    "Mouse1" "CorePointer"
	InputDevice    "Keyboard1" "CoreKeyboard"
	Option		"AIGLX" "true"
EndSection

Section "Files"
	FontPath     "/usr/share/fonts/misc/"
	FontPath     "/usr/share/fonts/Type1/"
	FontPath     "/usr/share/fonts/TTF/"
	FontPath     "/usr/share/fonts/corefonts/"
	FontPath     "/usr/local/share/fonts/"
EndSection

Section "Module"
	Load  "dbe"  	# Double buffer extension
	Load  "extmod"
#      Option    "omit xfree86-dga" 
	Load  "type1"
	Load  "freetype"
# This loads the GLX module
	Load  "glx"   # libglx.a
	Load  "dri"   # libdri.a
	Load  "drm"
EndSection

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

Section "InputDevice"
	Identifier  "Keyboard1"
	Driver      "kbd"
	Option	    "AutoRepeat" "500 30"
# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
	Option	    "XkbModel" "pc105"
	Option	    "XkbLayout" "pl"
EndSection

Section "InputDevice"
	Identifier  "Mouse1"
	Driver      "mouse"
	Option	    "Protocol" "ImPS/2"
	Option	    "ZAxisMapping" "4 5"
	Option	    "Device" "/dev/input/mice"
# When using XQUEUE, comment out the above two lines, and uncomment
EndSection

Section "Monitor"
	Identifier   "Monitor0"
EndSection

Section "Device"
	Identifier	"Radeon"
	Driver		"radeon"
	Option		"EnablePageFlip"	"1"
	Option		"MonitorLayout"		"LVDS, NONE"
	Option		"RenderAccel"		"1"
	Option		"DynamicClocks"		"1"
	Option		"XAANoOffscreenPixmaps"	"1"
	#Option		"AccelMethod"		"EXA"
	Option		"DRI"			"1"
	Option 		"backingstore"		"1"
	Option		"BusType"		"PCIE"
	Option		"DCCMode"		"1"
EndSection


Section "Screen"

    #Option "backingstore"
	Identifier "Screen0"
	Device	   "Radeon"
	Monitor    "Monitor0"
	DefaultDepth     24
	SubSection "Display"

  # initial origin if mode is smaller than desktop
#        Virtual     1280 1024
		Viewport   0 0
		Depth     24
		Modes    "1280x800" "1024x768" "800x600" "640x480"
	EndSubSection
EndSection

Section "DRI"
	Mode         0666
EndSection