Currently Being ModeratedSep 3, 2011 3:17 PM (in response to plgodin)
Has anyone figured anything out with this yet? I'm having this exact same problem, running Lion, Early 2011 17" MBP, it happens when it is plugged in and when it's not plugged in, not sure if it matters, but I also have the AMD Radeon HD 6750M 1024 Graphic card...Like I said, not sure if it makes a difference, if this could even be a graphics card issue, just curious if the OP has the same card.
Currently Being ModeratedJan 19, 2012 5:48 AM (in response to plgodin)
Had this same problem and turned out to be caused by a bad removal of insomniaT. Ran the uninstaller and solved everything.