J'ai le même problème (fc6)
J'ai désinstallé/réinstallé (via yum) fglrx plusieurs fois, ça n'a rien réglé (dans mon cas).
Au démarrage, j'ai bien les 20 secondes d'attente.
Pour info:
# grep EE /var/log/Xorg.0.log -3
[...]
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[...]
--
[3] -1 0 0x00000000 - 0x0009ffff (0xa0000) MX[b]
[4] -1 0 0x0000ffff - 0x0000ffff (0x1) IX[b]
[5] -1 0 0x00000000 - 0x000000ff (0x100) IX[b]
(EE) end of block range 0xfffffff < begin 0xe0000000
(II) Active PCI resource ranges:
[0] -1 0 0xff5f0000 - 0xff5fffff (0x10000) MX[b]
[1] -1 0 0xff6fc000 - 0xff6fcfff (0x1000) MX[b]
--
(II) LoadModule: "GLcore"
(II) Loading /usr/lib64/xorg/modules/extensions/libGLcore.so
dlopen: /usr/lib64/xorg/modules/extensions/libGLcore.so: undefined symbol: _glap
i_Dispatch
(EE) Failed to load /usr/lib64/xorg/modules/extensions/libGLcore.so
(II) UnloadModule: "GLcore"
(EE) Failed to load module "GLcore" (loader failed, 7)
(II) LoadModule: "record"
(II) Loading /usr/lib64/xorg/modules/extensions/librecord.so
(II) Module record: vendor="X.Org Foundation"
--
[27] -1 0 0x00005080 - 0x0000509f (0x20) IX[b]
[28] -1 0 0x0000a800 - 0x0000a8ff (0x100) IX[b](B)
(II) fglrx(0): pEnt->device->identifier=0x9cc8e0
(EE) end of block range 0xfffffff < begin 0xe0000000
(II) resource ranges after probing:
[0] -1 0 0x00100000 - 0x3fffffff (0x3ff00000) MX[b]E(B)
[1] -1 0 0x000f0000 - 0x000fffff (0x10000) MX[b]
Et:
# cat /etc/X11/xorg.conf
# Xorg configuration created by pyxf86config
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "Module"
Load "dbe"
Load "fbdevhw"
Load "GLcore"
Load "record"
Load "freetype"
Load "type1"
Load "evdev"
Load "glx"
Load "extmod"
EndSection
Section "ServerFlags"
Option "AIGLX" "false"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "fr"
Option "XkbVariant" "latin9"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "radeon"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection