The installation of Catalyst 7.2 has slowed my RV505 [Radeon X1550 64-bit] down significantly. glxgears gives me just 75.350 FPS (334 frames in 5.0 secs), and some programs, especially Firefox (extremely slow scrolling) and Gimp show bad response times. Catalyst 7.1 worked perfectly well, the xorg.conf is stillö the same.

My xorg.conf:
Code:
## /.../
# SaX generated X11 config file
# Created on: 2007-12-31T16:41:35+0000.
#
# Version: 8.1
# Contact: Marcus Schaefer <sax@suse.de>, 2005
# Contact: SaX-User list <https://lists.berlios.de/mailman/listinfo/sax-users>
#
# Automatically generated by [ISaX] (8.1)
# PLEASE DO NOT EDIT THIS FILE!
#

Section "Files"
  FontPath     "/usr/share/fonts/misc:unscaled"
  FontPath     "/usr/share/fonts/75dpi:unscaled"
  FontPath     "/usr/share/fonts/100dpi:unscaled"
  FontPath     "/usr/share/fonts/Type1"
  FontPath     "/usr/share/fonts/URW"
  FontPath     "/usr/share/fonts/Speedo"
  FontPath     "/usr/share/fonts/cyrillic"
  FontPath     "/usr/share/fonts/truetype"
  FontPath     "/usr/share/fonts/uni:unscaled"
  FontPath     "/opt/kde3/share/fonts"
  FontPath     "/usr/local/share/fonts"
  InputDevices "/dev/gpmdata"
  InputDevices "/dev/input/mice"
EndSection

Section "ServerFlags"
  Option       "AIGLX" "enable"
  Option       "AllowMouseOpenFail" "on"
  Option       "IgnoreABI" "on"
EndSection

Section "Module"
  Load         "glx"
  Load         "type1"
  Load         "extmod"
  Load         "dbe"
  Load         "freetype"
  Load         "dri"
EndSection

Section "InputDevice"
  Driver       "kbd"
  Identifier   "Keyboard[0]"
  Option       "Protocol" "Standard"
  Option       "XkbLayout" "de"
  Option       "XkbModel" "logiaccess"
  Option       "XkbRules" "xfree86"
  Option       "XkbVariant" "deadgraveacute"
EndSection


Section "InputDevice"
  Driver       "mouse"
  Identifier   "Mouse[1]"
  Option       "Buttons" "5"
  Option       "Device" "/dev/input/mice"
  Option       "Name" "Microsoft Wheel Mouse Optical"
  Option       "Protocol" "explorerps/2"
  Option       "Vendor" "Sysp"
  Option       "ZAxisMapping" "4 5"
EndSection


Section "Monitor"
  Option       "CalcAlgorithm" "XServerPool"
  DisplaySize  304 228
  HorizSync    31-60
  Identifier   "Monitor[0]"
  ModelName    "NEC CI FT500"
  Option       "DPMS"
  VendorName   "NCI"
  VertRefresh  50-75
  UseModes     "Modes[0]"
EndSection


Section "Modes"
  Identifier   "Modes[0]"
EndSection


Section "Screen"
  DefaultDepth 24
  SubSection "Display"
    Depth      15
    Modes      "1024x768" "800x600" 
  EndSubSection
  SubSection "Display"
    Depth      16
    Modes      "1024x768" "800x600" 
  EndSubSection
  SubSection "Display"
    Depth      24
    Modes      "1024x768" "800x600" 
  EndSubSection
  SubSection "Display"
    Depth      8
    Modes      "1024x768" "800x600" 
  EndSubSection
  Device       "Device[0]"
  Identifier   "Screen[0]"
  Monitor      "Monitor[0]"
EndSection


Section "Device"
  BoardName    "Radeon X1550 64-bit (RV505 7147)"
  BusID        "2:0:0"
  Driver       "fglrx"
  Identifier   "Device[0]"
  Option       "EXANoOffscreenPixmaps"
  Option       "FSAADisableGamma" "no"
  Option       "CapabilitiesEx" "0x00000000"
  Option       "ScreenOverlap" "0"
  Option       "FSAAMSPosY0" "0.000000"
  Option       "CenterMode" "off"
  Option       "FSAAMSPosX3" "0.000000"
  Option       "mtrr" "off"
  Option       "FSAAMSPosX4" "0.000000"
  Option       "FSAAMSPosY1" "0.000000"
  Option       "FSAAMSPosY2" "0.000000"
  Option       "FSAAScale" "1"
  Option       "ForceGenericCPU" "no"
  Option       "XAANoOffscreenPixmaps" "true"
  Option       "FSAAMSPosX5" "0.000000"
  Option       "FSAAMSPosY3" "0.000000"
  Option       "GammaCorrectionI" "0x04511445"
  Option       "no_accel" "no"
  Option       "FSAAMSPosY4" "0.000000"
  Option       "FSAAMSPosY5" "0.000000"
  Option       "UseFastTLS" "0"
  Option       "FSAACustomizeMSPos" "no"
  Option       "FSAAEnable" "no"
  Option       "BlockSignalsOnLock" "on"
  Option       "Capabilities" "0x00000000"
  Option       "GammaCorrectionII" "0x00000000"
  Option       "no_dri" "no"
  Option       "VideoOverlay" "on"
  Option       "UseInternalAGPGART" "no"
  Option       "StereoSyncEnable" "1"
  Option       "PseudoColorVisuals" "off"
  Option       "FSAAMSPosX0" "0.000000"
  Option       "FSAAMSPosX1" "0.000000"
  Option       "OpenGLOverlay" "off"
  Option       "AccelMethod" "EXA"
  Option       "FSAAMSPosX2" "0.000000"
  Option       "Stereo" "off"
  Screen       0
  VendorName   "ATI"
EndSection



Section "ServerLayout"
  Identifier   "Layout[all]"
  InputDevice  "Keyboard[0]" "CoreKeyboard"
  InputDevice  "Mouse[1]" "CorePointer"
  Option       "Clone" "off"
  Option       "Xinerama" "off"
  Screen       "Screen[0]"
EndSection


Section "DRI"
    Group      "video"
    Mode       0660
EndSection

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