Comment 204 for bug 600453

Same as comment #203 here on a DELL Latitude E6510 with resolution 1600x900 x64 kernel.

I rolled back to the standard kernel, which BTW, functions "correctly" despite the "failed to get i915 symbols, graphics turbo disabled" message: Wakeup after suspend always results in black screen, most of the times when I close the lid without locking the screen is does the same, even if I specified that closing lid should just black screen, not suspend.

Sometimes when plugging out/in on a docking station with an external monitor, it all goes black too.

No other options than hard reboot 4secs on Power button

Steven