T400 Can't switch to dedicated graphics card

[futurejp]

Hi,

I had a different problem last night that I posted about but I resolved it with a system restore. What I'm working with now is that I've installed drivers for my dedicated ATI card but when I right click on the battery gauge, go to Switchable Graphics, and click High Performance, the screen flickers a couple times but it doesn't actually switch. When I go back, it still says it's on Energy Saving.

I have a T400 and I'm running Windows 7, and I downloaded this driver for the ATI card: http://www-307.ibm.com/pc/support/site. ... MIGR-70417 . It's the first driver that has worked for it. It installed, asked me to reboot, and upon rebooting a DOS window came up as it did diagnostic tests. I also installed this: http://www-307.ibm.com/pc/support/site. ... MIGR-70601 so I could get the battery gauge.

According to the installation, it seemed to go fine, seeing as the screen flickered, it ran diagnostic tests, etc. But when I look at dxdiag, it only lists one display, the Mobile Intel 4 Series Express Chipset Family. And the ATI card isn't listed in the Device Manager under Display Adapters. So I think it's kind of confused.

To test it, I uninstalled the ATI drivers I had just installed. Then, when I went and right clicked on the battery gauge, the Switchable Graphics item was gone. So it knew that. Then I reinstalled the ATI drivers and the SG option was back. It just won't let me switch.

I think my computer is somewhere in limbo between not having anything installed for ATI and fully recognizing the graphics card.

Any help/ideas? Thanks.