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XPS 16 ( Minor problem) on display

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Dec 13, 2011
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Motherboard
XPS 1640 (ATI 4670m)
CPU
C2D 2.66
Graphics
ATI 4670 Mobility
Mac
  1. 0
Classic Mac
  1. 0
Mobile Phone
  1. Android
  2. iOS
I have a dell xps 1640 with Ati 4670 mobility, 4GB of RAM, C2D 2.66Ghz CPU.

I have upgrade the lion OSX to 10.7.4

The problem i having now is my LVDS display is goes blank when I clicked detect display.

I able to run full hd resolution with qe/ci . My hdmi and vga port and working find.

When i close my laptop lid , the internal ( lvds) screen goes blank too.

Currently, im using chameleon latest r2015 and running using aty_init.

Thanks,
vincent

P.S my pc sleep is not working.
 
Help?

Anyone help? pls ..
 
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