X.org on F13 Alpha and monitor setup

[Stefan Schulze Frielinghaus]

Today I wanted to give F13 Alpha a test and installed it. The
installation went fine but I do not get a proper screen resolution
setup. The basic setup was done via system-config-display, I only added
a modeline. But it seems to me that the modeline is ignored. Is this a
new behavior because of kernel based mode setting or is this a bug and I
should file a report? At the moment the screen resolution is 1024x768
but I expected 1280x1024. Can someone confirm this behavior?

I'm wondering because before F10 was installed, and I even did not need
to setup a modeline. Everything was automatically configured by X.org.

cheers,
Stefan

PS: It was a fresh install.
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# Xorg configuration created by system-config-display

Section "ServerLayout"
	Identifier     "single head configuration"
	Screen      0  "Screen0" 0 0
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"

# keyboard added by system-config-display
	Identifier  "Keyboard0"
	Driver      "kbd"
	Option	    "XkbModel" "pc105"
	Option	    "XkbLayout" "de"
	Option	    "XkbVariant" "nodeadkeys"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	ModelName    "Eizo L568"
	HorizSync    24.0 - 80.0
	VertRefresh  50.0 - 75.0
	Option	    "dpms"
	Modeline "1280x1024R"   90.75  1280 1328 1360 1440  1024 1027 1034 1054 +hsync -vsync
EndSection

Section "Device"
	Identifier  "Videocard0"
	Driver      "radeon"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Videocard0"
	Monitor    "Monitor0"
	DefaultDepth     24
	SubSection "Display"
		Viewport   0 0
		Depth     24
		Modes "1280x1024R"
	EndSubSection
EndSection