ubunt执行unity --reset时候出错，我是nvdia显卡，已经安装了最新的驱动，并且重启过。请教各位怎么回事

Xlib: extension "RANDR" missing on display ":0".
Checking if settings need to be migrated ...no
Checking if internal files need to be migrated ...no
Backend : gconf
Integration : true
Profile : unity
Adding plugins
Skipping upgrade com.canonical.unity.unity.01.upgrade
Skipping upgrade com.canonical.unity.unity.02.upgrade
Initializing core options...done
Initializing bailer options...done
Initializing detection options...done
Initializing composite options...done
Initializing opengl options...done
Initializing decor options...done
Initializing mousepoll options...done
Initializing vpswitch options...done
Initializing animation options...done
Initializing snap options...done
compiz (expo) - Warn: failed to bind image to texture
Initializing expo options...done
Initializing move options...done
Initializing place options...done
Initializing grid options...done
Initializing gnomecompat options...done
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
compiz (core) - Warn: No GLXFBConfig for depth 32
compiz (wall) - Error: Couldn't create cairo context for switcher
Initializing wall options...done
Initializing ezoom options...done
Initializing workarounds options...done
Initializing resize options...done
Initializing fade options...done
Initializing unitymtgrabhandles options...done
Initializing scale options...done
Initializing session options...done
WARN 2012-04-03 17:03:57 glib.glib-gobject <unknown>:0 invalid (NULL) pointer instance
Xlib: extension "XINERAMA" missing on display ":0".
Segmentation fault
WARNING: no DISPLAY variable set, setting it to :0
WARNING: Unity currently default profile, so switching to metacity while resetting the values


我只有一个screen。 直接执行命令unity也相同错误。我已经使用过nvidia-xconfig生成过新的xorg配置文件，但还是相同错误。
笔记本型号：thinkpad T410
nvidia驱动：
[email protected]:~$ lspci |grep VGA
01:00.0 VGA compatible controller: nVidia Corporation GT218 [NVS 3100M] (rev a2)

帮顶了，我刚好也遇到这问题！！！！