原因：qq和里不兼容
解决方案：
最好用管理员账户登录。
sudo gedit /usr/bin/qq
在第二行加入： export GDK_NATIVE_WINDOWS=true
注意请使用VI编辑器进行处理！！！
即全文修改为：
#！ /bin/sh
export GDK_NATIVE_WINDOWS=true
cd /usr/share/tencent/qq/
./qq
保存后退出，重启QQ
在网上搜了一下GDK_NATIVE_WINDOWS=true参数到作用，但是没看太明白。。。
原文地址：http://blogs.gurulabs.com/dax/2009/10/what-gdk-native.html
GDK has been rewritten to use 'client-side windows'.
This means that GDK maintains its own window hierarchy and only
uses X windows where it is necessary or explicitly requested. Some
of the benefits of this change are
- Reduced flicker
- The ability to do transformed and animated rendering of
widgets
- Easier embedding of GTK+ widgets, e.g. into Clutter scene
graphs
Launching an app with GDK_NATIVE_WINDOWS=1
application turns off this feature. This is needed if
the application manipulates the windows it creates using direct X
API calls or a mixture of X API and GDK instead of just going
through GDK. When using "client-side windows" all window
manipulation by an application must go through GDK. Adobe needs to
update Acroread to be compatible with this feature.