錯誤日志(/var/log/Xorg.0.log)如下：
[ 103.317] X.Org X Server 1.10.6 Release Date: 2012-02-10 [ 103.320] X Protocol Version 11, Revision 0 [ 103.321] Build Operating System: c6b9 2.6.32-220.el6.x86_64 [ 103.322] Current Operating System: Linux localhost.localdomain 2.6.32-220.4.2.el6.centos.plus.x86_64 #1 SMP Mon Feb 13 23:42:47 GMT 2012 x86_64 [ 103.323] Kernel command line: ro root=UUID=54b2cc58-8fc6-4e3a-900f-c182b437cd71 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD quiet rhgb crashkernel=128M LANG=zh_CN.UTF-8 rd_NO_LVM rd_NO_DM single [ 103.325] Build Date: 22 June 2012 08:01:35PM [ 103.326] Build ID: xorg-x11-server 1.10.6-1.el6.centos [ 103.327] Current version of pixman: 0.18.4 [ 103.328] Before reporting problems, check https://www.redhat.com/apps/support/ to make sure that you have the latest version. [ 103.330] Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 103.334] (==) Log file: "/var/log/Xorg.0.log", Time: Fri Nov 9 04:07:42 2012 [ 103.359] (==) Using config file: "/etc/X11/xorg.conf" [ 103.360] (==) ServerLayout "aticonfig Layout" [ 103.360] (**) |-->Screen "aticonfig-Screen[0]-0" (0) [ 103.360] (**) | |-->Monitor "aticonfig-Monitor[0]-0" [ 103.360] (**) | |-->Device "aticonfig-Device[0]-0" [ 103.360] (==) Automatically adding devices [ 103.360] (==) Automatically enabling devices [ 103.360] (==) FontPath set to: catalogue:/etc/X11/fontpath.d, built-ins [ 103.360] (==) ModulePath set to "/usr/lib64/xorg/modules" [ 103.360] (II) The server relies on HAL to provide the list of input devices. If no devices become available, reconfigure HAL or disable AutoAddDevices. [ 103.360] (II) Loader magic: 0x7d51a0 [ 103.360] (II) Module ABI versions: [ 103.360] X.Org ANSI C Emulation: 0.4 [ 103.360] X.Org Video Driver: 10.0 [ 103.360] X.Org XInput driver : 12.2 [ 103.360] X.Org Server Extension : 5.0 [ 103.362] (--) PCI:*(0:0:2:0) 8086:0126:17aa:21e3 rev 9, Mem @ 0xe0000000/4194304, 0xd0000000/268435456, I/O @ 0x00007000/64, BIOS @ 0x????????/131072 [ 103.362] (--) PCI: (0:1:0:0) 1002:6760:17aa:21e3 rev 0, Mem @ 0xc0000000/268435456, 0xe2600000/131072, I/O @ 0x00006000/256, BIOS @ 0x????????/131072 [ 103.362] (II) "extmod" will be loaded by default. [ 103.362] (II) "dbe" will be loaded by default. [ 103.362] (II) "glx" will be loaded by default. [ 103.362] (II) "record" will be loaded by default. [ 103.362] (II) "dri" will be loaded by default. [ 103.362] (II) "dri2" will be loaded by default. [ 103.362] (II) LoadModule: "extmod" [ 103.387] (II) Loading /usr/lib64/xorg/modules/extensions/libextmod.so [ 103.387] (II) Module extmod: vendor="X.Org Foundation" [ 103.387] compiled for 1.10.6, module version = 1.0.0 [ 103.387] Module class: X.Org Server Extension [ 103.387] ABI class: X.Org Server Extension, version 5.0 [ 103.387] (II) Loading extension SELinux [ 103.387] (II) Loading extension MIT-SCREEN-SAVER [ 103.387] (II) Loading extension XFree86-VidModeExtension [ 103.387] (II) Loading extension XFree86-DGA [ 103.387] (II) Loading extension DPMS [ 103.387] (II) Loading extension XVideo [ 103.387] (II) Loading extension XVideo-MotionCompensation [ 103.387] (II) Loading extension X-Resource [ 103.387] (II) LoadModule: "dbe" [ 103.387] (II) Loading /usr/lib64/xorg/modules/extensions/libdbe.so [ 103.387] (II) Module dbe: vendor="X.Org Foundation" [ 103.387] compiled for 1.10.6, module version = 1.0.0 [ 103.387] Module class: X.Org Server Extension [ 103.387] ABI class: X.Org Server Extension, version 5.0 [ 103.387] (II) Loading extension DOUBLE-BUFFER [ 103.387] (II) LoadModule: "glx" [ 103.387] (II) Loading /usr/lib64/xorg/modules/extensions/libglx.so [ 103.388] (II) Module glx: vendor="X.Org Foundation" [ 103.388] compiled for 1.10.6, module version = 1.0.0 [ 103.388] ABI class: X.Org Server Extension, version 5.0 [ 103.388] (==) AIGLX enabled [ 103.388] (II) Loading extension GLX [ 103.388] (II) LoadModule: "record" [ 103.388] (II) Loading /usr/lib64/xorg/modules/extensions/librecord.so [ 103.388] (II) Module record: vendor="X.Org Foundation" [ 103.388] compiled for 1.10.6, module version = 1.13.0 [ 103.388] Module class: X.Org Server Extension [ 103.388] ABI class: X.Org Server Extension, version 5.0 [ 103.388] (II) Loading extension RECORD [ 103.388] (II) LoadModule: "dri" [ 103.388] (II) Loading /usr/lib64/xorg/modules/extensions/libdri.so [ 103.388] (II) Module dri: vendor="X.Org Foundation" [ 103.388] compiled for 1.10.6, module version = 1.0.0 [ 103.388] ABI class: X.Org Server Extension, version 5.0 [ 103.388] (II) Loading extension XFree86-DRI [ 103.388] (II) LoadModule: "dri2" [ 103.388] (II) Loading /usr/lib64/xorg/modules/extensions/libdri2.so [ 103.388] (II) Module dri2: vendor="X.Org Foundation" [ 103.388] compiled for 1.10.6, module version = 1.2.0 [ 103.388] ABI class: X.Org Server Extension, version 5.0 [ 103.388] (II) Loading extension DRI2 [ 103.388] (II) LoadModule: "fglrx" [ 103.402] (II) Loading /usr/lib64/xorg/modules/drivers/fglrx_drv.so [ 103.604] (II) Module fglrx: vendor="FireGL - ATI Technologies Inc." [ 103.611] compiled for 1.4.99.906, module version = 8.93.4 [ 103.611] Module class: X.Org Video Driver [ 103.616] (II) Loading sub module "fglrxdrm" [ 103.616] (II) LoadModule: "fglrxdrm" [ 103.616] (II) Loading /usr/lib64/xorg/modules/linux/libfglrxdrm.so [ 103.617] (II) Module fglrxdrm: vendor="FireGL - ATI Technologies Inc." [ 103.617] compiled for 1.4.99.906, module version = 8.93.4 [ 103.617] (II) ATI Proprietary Linux Driver Version Identifier:8.93.4 [ 103.617] (II) ATI Proprietary Linux Driver Release Identifier: 8.93 [ 103.617] (II) ATI Proprietary Linux Driver Build Date: Dec 5 2011 21:06:58 [ 103.617] (--) using VT number 2 [ 103.623] (WW) Falling back to old probe method for fglrx [ 103.651] (II) Loading PCS database from /etc/ati/amdpcsdb [ 103.666] (--) Chipset Supported AMD Graphics Processor (0x6760) found [ 103.667] (II) fglrx: intel VGA device detected, load intel driver. [ 103.667] (II) LoadModule: "intel" [ 103.667] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so [ 103.668] (II) Module intel: vendor="X.Org Foundation" [ 103.668] compiled for 1.10.4, module version = 2.16.0 [ 103.668] Module class: X.Org Video Driver [ 103.668] ABI class: X.Org Video Driver, version 10.0 [ 103.682] ukiDynamicMajor: found major device number 249 [ 103.682] ukiDynamicMajor: found major device number 249 [ 103.682] ukiOpenByBusid: Searching for BusID PCI:1:0:0 [ 103.682] ukiOpenDevice: node name is /dev/ati/card0 [ 103.682] ukiOpenDevice: open result is 9, (OK) [ 103.682] ukiOpenByBusid: ukiOpenMinor returns 9 [ 103.682] ukiOpenByBusid: ukiGetBusid reports PCI:1:0:0 [ 103.684] (II) AMD Video driver is running on a device belonging to a group targeted for this release [ 103.684] (II) AMD Video driver is signed [ 103.684] (II) Loading /usr/lib64/xorg/modules/drivers/fglrx_drv.so [ 103.684] (II) Loading /usr/lib64/xorg/modules/linux/libfglrxdrm.so [ 103.684] (II) fglrx(0): pEnt->device->identifier=0x11a5100 [ 103.686] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so [ 103.686] (II) intel(1): pEnt->device->identifier=(nil) [ 103.686] (EE) Screen 1 deleted because of no matching config section. [ 103.687] (II) UnloadModule: "intel" [ 103.687] (II) Unloading intel [ 103.687] (II) fglrx(0): === [xdl_xs110_atiddxPreInit] === begin [ 103.687] (II) fglrx(0): PowerXpress: Discrete GPU is selected. [ 103.712] (EE) fglrx(0): PowerXpress: /usr/lib64/fglrx/switchlibglx failed with exit status 1 [ 103.712] (II) fglrx(0): PowerXpress: Diagnostic output from /usr/lib64/fglrx/switchlibglx: File /usr/lib64/xorg/modules/extensions/libglx.so exist, but it is not a link file. [ 103.712] (EE) fglrx(0): Active libglx doesn't match current PX setting. [ 103.712] (EE) fglrx(0): PowerXpress: Fail to switch libGL link files. [ 103.712] (WW) fglrx(0): PreInit PowerXpress failed! Backtrace: [ 103.714] 0: /usr/bin/X (xorg_backtrace+0x28) [0x458908] [ 103.714] 1: /usr/bin/X (0x400000+0x5f629) [0x45f629] [ 103.714] 2: /lib64/libpthread.so.0 (0x7f0459207000+0xf500) [0x7f0459216500] [ 103.714] 3: /usr/lib64/xorg/modules/drivers/fglrx_drv.so (xdl_xs110_atiddxFreeScreen+0x72) [0x7f045670c112] [ 103.714] 4: /usr/bin/X (xf86DeleteScreen+0x7c) [0x46ad8c] [ 103.714] 5: /usr/bin/X (InitOutput+0x8c6) [0x46e5e6] [ 103.714] 6: /usr/bin/X (0x400000+0x21c8d) [0x421c8d] [ 103.714] 7: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x7f04587eacdd] [ 103.714] 8: /usr/bin/X (0x400000+0x219d9) [0x4219d9] [ 103.714] Segmentation fault at address 0x40 [ 103.714] Fatal server error: [ 103.714] Caught signal 11 (Segmentation fault). Server aborting [ 103.714] [ 103.714] Please consult the CentOS support at https://www.redhat.com/apps/support/ for help. [ 103.714] Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 103.714]
solution：
1.現進入系統的命令行模式
A: 修改grub引導，在kernel命令最后，添加“1” 或者 “single”。這樣就可以進入單用戶的命令行模式
2. 卸載ATI驅動，或者說重新安裝ATI驅動
[user]# ./amd-driver-installer-12-1-x86.x86_64.run --uninstall=force [user]# reboot
卸載后，重啟下電腦。接下去如果你還要安裝這個驅動，就再裝一便吧。
總結：
問題應該出在ATI驅動上，更新后，估計部分不兼容哦....