Lenovo IdeaPad U330 installing Windows7 known issue

I just bought a laptop which is Lenovo IdeaPad U330

I was trying to install Windows 7 Beta 1 Build 7000 on this laptop.

After Windows 7 setup done, I saw there’s two graphic card in device manager, the same as Windows Vista

Then I try to install the VGA drivers which from Lenovo website although it is said the driver is only support Windows Vista, because almost all the driver can easy support Windows7 which is the same kernel.

Unfortunately after I install the VGA drivers, there’s only one graphic(Inter integrated graphic card) card left in the device manager.

I cannot switch to the ATI 3450 card via Switchable Graphics application

I try to write mail to Lenovo and also send it to Windows 7 team, no one reply yet.

I also found some of the user with the same device U330 has the same issue.

We need to fix it ASAP, I love Windows7, it’s unbelievable fast and beautiful

Hope some one from Lenovo or Microsoft Windows 7 team can see this.

Update:2009/01/10

Get reply from Lenovo China support center

尊敬的联想客户您好：

您遇到的问题是:双显卡切换无法正常工作在Windows7下面我使用的是最新版的Windows 7 Beta 1 build 7000 当我安装显卡驱动后，系统只能识别出一块显卡，无法进行双显卡切换
根据您所描述的情况，我们给您提供的解决方案如下：

         由于Windows 7 目前只是测试版本，微软还没有发布正式版本，我们无法保证VISTA下的驱动程序可以在该系统下正常使用。如果您需要使用显卡切换功能，建议您最好使用预装的VISTA系统。

        双显卡切换功能目前仅在vista SP1版本下可以正常使用，需要您开启BIOS中的切换设置（Advanced下的Graphics  Device设置为Switchable Graphics，默认就是此设置），并正确安装显卡驱动程序（网站提供的驱动包含独立和集成显卡的驱动）

Update:2009/01/11

found some other guys has the same issue as me in Lenovo forum

http://forums.lenovo.com/lnv/board/message?message.uid=85293#U85293

Update:2009/01/12

found Lenovo has create a thread in its forum

http://forums.lenovo.com/lnv/board?board.id=Beta_OS

Update:2009/01/13(fix one)

Beta OS forum has announce a new page for the latest driver for Windows 7 support

http://www-307.ibm.com/pc/support/site.wss/WIN7-BETA.html

Try to disabled Switchable Graphics in BIOS and installed Windows 7 again.

All the device can get drivers expect on “Unknown device”, try to find the driver, finally  found the “Unknown device” is Lenovo Energy control device, Install the “U330_Vista_PowerManagement” which comes from the Lenovo website, resolved.

Another confusing thing is my hard disk can only get 3.0 point rate result in system, all other device rate result is normal, i didn’t install any drivers only energy power driver, Windows7 can regonize almost all the device, in Vista, my U330 disk can get 5.3 rate point, that why i’m confusing

Update:2009/01/14(fix one)

Found solution for hard disk get rate result too low

go to device manager—>disk drivers—>properties of your hard disk—>policies

first unclick the “Enable write caching on the disk”, then rate it again

your rate score should be normal

then back to policies and click the “Enable write caching on the disk”

rate again, score no change

this should be a bug in Windows7