After installing Switchable Graphics Driver sreen is very dark!how to fix?

i did a clean installation of windows 7 on my t500 . i downloaded lenovo system update manager and it installed several drivers inlcuding switchable grpx drivers [i have 3650 hd] immediately after it installed the switchable grpx driver the screen become really dark!! how to fix it?! i also have problem when the computer is going to sleep mode and doesnt get back or even the computer just shuts off after a while i dont use it when its open.. how to fix it? thanks for the help

Can you please explain more the missing of the brightness settings? I can set the brightness of my screen using F5 and F6 in combination with the FN key using the keyboard.
The bringhtness also sets automatically depending the environment and the power condition of machine. If you don't like the behaviour of auto setting the brightness you can unselect the option in power optiion in system settings (swiping right to left and selecting settings on the side bar at the bottom).
Seting brightness from the touchscreen ............... that i have to figure out.
If you can share with me what exactly the problem is with your brightness settins I will check if I can reproduce it on my Helix (that is if you have a Helix).
Hope the above helps .
As to speed. All works great. Try to remember since when your computer started working slow and with the problems of display. Do you regularly back up? If so you can try to restore to the point where all was working great.
Ohhh, ok i found another way to set brightness. You can right click on your battery icon in the system tray and there you should see a dropdownl list with some options and setting brightness is one of the options.
Regards,

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