Hi, Dual booting Lion and SL - very happily - on a 2006 1.83 MA699LL/A macbook with 2G memory. Until Lion 10.7.5... I have lidwake and acwake set to 0 & I have hibernatemode set to 25. (I set it that way because I want to deliberately push the power button to come back from hibernate, [not sleep] ). OK, so, now when it comes back from hibernation, the restore progress bar works its way across then the screen goes black. I have discovered that I can tweak it back on with the screen brightness keys - up and down - (F1/F2) but it wasn't doing that before 10.7.5. At first I thought it was hanging, then I discovered the disk was still spinning, and I could ssh in just fine. So, it was a graphics issue. Is there some other setting that changed in 10.7.5? Booting back to the SL partition - no problem. That works (for the above issue) like it always used to (and as Lion used to). So, not a hardware issue. Does anyone have any ideas? Kind regards Derek.