Upgraded to Lion a few months ago, and work remotely from home using Timbuktu Pro which I've used for years.Have been using Lion for the past few months without problems. In the past few weeks if the remote computer, a mac mini (at my office) is not accessed, the screen appears to be gray when viewing remotely and I cannot wake it up. Energy saver preferences are set to wake up with network access, never go to sleep, keyboard is an Apple USB as well as USB mouse. I had used a bluetooth mouse & thought that might be the issue, so I disconnected it at the end of the day although Bluetooth is still on. Tried disconnecting an external drive (USB) but that didn't make a difference. The only way it will wake up is if someone at the office physically clicks the mouse a few times, then it wakes up. I've tried sending a fax to the remote computer as the office fax machine is connected to the remote computer; the fax is received as it shows up in the Dropbox, but that doesn't wake the mac mini. Very puzzled as all worked well until a few weeks ago. Display has not been changed (DVI), have not added new peripherals although I do have a powered hub connected to the remote computer which I haven't tried disconnecting. Bottom line is that nothing has changed other than Lion upgrades. As so many people are having a problem, I suspect this is a Lion issue. The remote mac mini is approximately 2 years old. I upgraded the RAM about 6 weeks ago to 8 GB (Crucial) and haven't tested that, but it was working fine after the RAM upgraded until recently.
