Comment 21 for bug 126214

I can confirm this bug is related to fglrx driver (on my macbook pro D2C at last!)

I created this simple script called "gotsleep.sh" :
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#!/bin/sh
/etc/init.d/gdm stop
modprobe -r fglrx
/etc/acpi/sleep.sh
/etc/init.d/gdm start
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then switched to a text VT (ctrl+alt+1) login and run

sudo gotsleep.sh

(Stopping gdm means you are going to be logged out from your desktop but it is necessary ti remove the fireglx driver from kernel )

Launching gotsleep.sh makes the mac go to sleep and wake up again on lid reopened quite well all the times...

Diego.