Tuesday, September 26, 2006

奇怪的 TP-LINK 无线网卡驱动

由于新买的 ASUS A6Jc 笔记本没有自带无线网卡,于是我另外购买了一块 TP-LINK 的 TL-WN310G 无线网卡。安装以后出现一些问题,现总结如下:

现象
安装完驱动重新启动后,Windows XP 由其特有的欢迎登录界面变成经典的窗口登录模式。切在控制面板“用户设置”中无法改回欢迎界面登录模式,会提示“近期安装的应用程序屏蔽了欢迎界面和快速用户切换。您需要卸载该应用程序来恢复这项特性。以下名称或许能帮助您识别该应用程序:athgina.dll”。

原因
驱动程序安装时会用其自带的 athgina.dll 文件取代 Windows XP 自身的 msgina.dll 并写入注册表从而改变 GINA 的行为。

GINA 的全称为“Graphical Identification and Authentication”——图形化识别和验证。它是几个动态数据库文件,被 winlogon.exe 所调用,为其提供能够对用户身份进行识别和验证的函数,并将用户的帐号和密码反馈给 winlogon.exe。在登录过程中,“欢迎屏幕”和“登录对话框”就是 GINA 显示的。

无线网卡的驱动程序安装自己的动态链接库来控制 GINA,推测可能是为了获取用户登录的用户名密码以便在登录有身份验证的无线网络时使用。

解决办法
如果只是使用不加安全验证的无线网络,实际上是永不到这个动态链接库的。打开注册表,找到键值
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\GinaDLL,其值应该就是 athgina.dll,将其删掉,就可以立即到控制面板里重新设置欢迎登录界面和用户快速切换。实际上,Windows 默认是没有这个键值的,而只要存在这个键值,欢迎登录界面和用户快速切换功能就会被屏蔽,哪怕其值是 Windows 自身的 msgina.dll。

如果需要使用 WPA + PEAP(MSCHAP v2) 安全验证的无线网络,似乎只有放弃 Windows XP 的欢迎登录机界面和用户快速切换功能了。去掉以上键值后,不管是用 Windows 自带的无线忘了连接向导还是 TP-LINK 驱动盘提供的无线网络连接程序都无法正确建立无线连接,而把这个键值重新加上即可。

Update on 2006/10/30:
今天又把笔记本带到公司,注册表中没有 GinaDLL 这一项,但是正常的连接到了公司的无线网络。看来这个东西并不是必要的。

19 comments:

鱼 said...

兄弟,我也是用这块卡啊,从学校忘了拿驱动盘回来,到网上找的用不了,兄弟能把你盘里的驱动打包e-mail给偶么?如能助小弟如愿,将不胜感激!E-mail: pcbeta@qq.com

Anonymous said...

鱼与熊掌可以兼得。
在网上找一个名叫“xp_fixlogon.exe”的文件能够解决你的一切问题。国外网站有相关讨论。刚刚遇到并解决了这个问题。

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