[radeon] Xorg 100% CPU, freezes, only way to resume is to reboot

Question

Hello, I have an ATI Radeon 9250 with the bleeding edge Arch. Occasionally, my graphics will randomly stop working, and the only thing that works is the mouse (although slowly)
Rarely, the graphics cut out completely and the screen turns off, or I get an "Input Signal Out of Range" message from my monitor.
The kernel doesn't crash however, I can SSH in (very slowly) and then killall -9 Xorg (but it makes no difference on the screen).
If I run 'top' I see Xorg uses nearly 100% of CPU until it is killed by "KILL" signal. Even then, the process doesn't disappear, it just kills the processor usage.
I will see if I can get an Xorg log and 'dmesg' from one of these crashes.
/etc/X11/xorg.conf below:
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
# Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection
Section "Module"
Load "extmod"
Load "glx"
Load "dri"
Load "record"
Load "dbe"
Load "dri2"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection
Section "Monitor"
#DisplaySize 300 220 # mm
Identifier "Monitor0"
VendorName "HWP"
ModelName "HP vs15"
HorizSync 30.0 - 63.0
VertRefresh 50.0 - 76.0
Option "DPMS"
EndSection
#Section "Monitor"
# Identifier "Monitor1"
# VendorName "Monitor Vendor"
# ModelName "Monitor Model"
#EndSection
Section "Device"
### Available Driver options are:-
### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
### [arg]: arg optional
#Option "NoAccel" # [<bool>]
#Option "SWcursor" # [<bool>]
#Option "Dac6Bit" # [<bool>]
#Option "Dac8Bit" # [<bool>]
#Option "BusType" # [<str>]
#Option "CPPIOMode" # [<bool>]
#Option "CPusecTimeout" # <i>
#Option "AGPMode" # <i>
#Option "AGPFastWrite" # [<bool>]
#Option "AGPSize" # <i>
#Option "GARTSize" # <i>
#Option "RingSize" # <i>
#Option "BufferSize" # <i>
#Option "EnableDepthMoves" # [<bool>]
Option "EnablePageFlip"
#Option "NoBackBuffer" # [<bool>]
#Option "DMAForXv" # [<bool>]
#Option "FBTexPercent" # <i>
#Option "DepthBits" # <i>
#Option "PCIAPERSize" # <i>
#Option "AccelDFS" # [<bool>]
#Option "IgnoreEDID" # [<bool>]
#Option "DisplayPriority" # [<str>]
#Option "PanelSize" # [<str>]
#Option "ForceMinDotClock" # <freq>
#Option "ColorTiling" # [<bool>]
#Option "VideoKey" # <i>
#Option "RageTheatreCrystal" # <i>
#Option "RageTheatreTunerPort" # <i>
#Option "RageTheatreCompositePort" # <i>
#Option "RageTheatreSVideoPort" # <i>
#Option "TunerType" # <i>
#Option "RageTheatreMicrocPath" # <str>
#Option "RageTheatreMicrocType" # <str>
#Option "ScalerWidth" # <i>
Option "RenderAccel"
#Option "SubPixelOrder" # [<str>]
#Option "ShowCache" # [<bool>]
#Option "DynamicClocks" # [<bool>]
#Option "VGAAccess" # [<bool>]
#Option "ReverseDDC" # [<bool>]
#Option "LVDSProbePLL" # [<bool>]
Option "AccelMethod" "EXA"
#Option "DRI" # [<bool>]
#Option "ConnectorTable" # <str>
#Option "DefaultConnectorTable" # [<bool>]
#Option "DefaultTMDSPLL" # [<bool>]
#Option "TVDACLoadDetect" # [<bool>]
#Option "ForceTVOut" # [<bool>]
#Option "TVStandard" # <str>
#Option "IgnoreLidStatus" # [<bool>]
#Option "DefaultTVDACAdj" # [<bool>]
#Option "Int10" # [<bool>]
#Option "EXAVSync" # [<bool>]
#Option "ATOMTVOut" # [<bool>]
#Option "R4xxATOM" # [<bool>]
Identifier "Card0"
Driver "radeon"
VendorName "ATI Technologies Inc"
BoardName "RV280 [Radeon 9200 PRO]"
BusID "PCI:0:8:0"
EndSection
#Section "Device"
# ### Available Driver options are:-
# ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
# ### <string>: "String", <freq>: "<f> Hz/kHz/MHz"
# ### [arg]: arg optional
# #Option "ShadowFB" # [<bool>]
# #Option "DefaultRefresh" # [<bool>]
# #Option "ModeSetClearScreen" # [<bool>]
# Identifier "Card1"
# Driver "vesa"
# VendorName "Silicon Integrated Systems [SiS]"
# BoardName "661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter"
# BusID "PCI:1:0:0"
#EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 1
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 4
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 8
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 15
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
#Section "Screen"
# Identifier "Screen1"
# Device "Card1"
# Monitor "Monitor1"
# SubSection "Display"
# Viewport 0 0
# Depth 1
# EndSubSection
# SubSection "Display"
# Viewport 0 0
# Depth 4
# EndSubSection
# SubSection "Display"
# Viewport 0 0
# Depth 8
# EndSubSection
# SubSection "Display"
# Viewport 0 0
# Depth 15
# EndSubSection
# SubSection "Display"
# Viewport 0 0
# Depth 16
# EndSubSection
# SubSection "Display"
# Viewport 0 0
# Depth 24
# EndSubSection
#EndSection
I really hope someone can get to the bottom of this, it has been annoying me for quite some time. In fact, I think since the release of Xorg 7.0 if I remember.
Its gotten worse, which is why I'm posting.

Answer 1

I just set up the radeon driver for my HD 4200 graphics. I just installed Arch a couple of days ago so I am hopelessly noob.
Anyway, after a ton of messing around I got one screen working with KMS off, a minimal xorg.conf and then changed to 2 screens with xrandr. I don't have 3d working yet, which is not a big deal for my uses. But I figure I get something working and then start adding features.  Oh yeah, I'm using Xorg 1.7.1
my xorg:
Section "Device"
Identifier "HD4200"
Driver "radeon"
BusID "PCI:1:5:0"
# Option "VGA-0" "Samsung"
# Option "DVI-0" "Dell"
EndSection
Section "Screen"
Identifier "HD4200"
Device "HD4200"
DefaultDepth 24
Subsection "Display"
Virtual 3200 1200
EndSubsection
EndSection
Section "DRI"
Group "video"
Mode 0666
EndSection
The command that puts the screens where I want them:
xrandr --output VGA-0 --auto --right-of DVI-0