Update - something in the upgrade from Maverick to Natty appears to be the culprit for me. Good thing I made a complete backup prior to this upgrade.
I used the Alternate CD ISO to upgrade to Natty since the online Natty repository wasn't available..
Then I immediately used the online distribution upgrade to upgrade to Oneiric and it was during this install process that the my monitors first shut down (still running Natty). I updated and upgraded and distribution upgraded to Precise and when that didn't fix the problem, I did the same to Quantal. That still didn't solve the problem.
Since I spent the better part of a week screwing with this problem and never getting it fixed, I had to trash that entire system.
A fresh install of Precise on that same hardware did not have the problem. Clearly this bug is a huge upgrade blunder.
Update - something in the upgrade from Maverick to Natty appears to be the culprit for me. Good thing I made a complete backup prior to this upgrade.
I used the Alternate CD ISO to upgrade to Natty since the online Natty repository wasn't available..
Then I immediately used the online distribution upgrade to upgrade to Oneiric and it was during this install process that the my monitors first shut down (still running Natty). I updated and upgraded and distribution upgraded to Precise and when that didn't fix the problem, I did the same to Quantal. That still didn't solve the problem.
Since I spent the better part of a week screwing with this problem and never getting it fixed, I had to trash that entire system.
A fresh install of Precise on that same hardware did not have the problem. Clearly this bug is a huge upgrade blunder.