私はxorg / Intelのバグ(特にSビデオ関連:https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/763688)に苦しんでいます。これは、MaverickからNattyにアップグレードしたときに発生しました。



I chatted to a colleague who gave me this answer. It is possible, but not advisable.

To install an alternate package:

  • Open Synaptic Package Manager
  • From the menu select Settings | Repositories
  • Add the alternate source (in my case the maverick repo)
  • You should be prompted to reload sources, if not hit the Reload button
  • Find and select the package to downgrade
  • From the menu select Package | Force version...
  • Pick the older version
  • You will be warned that this may cause dependency errors
  • If you're feeling brave, go ahead

Reverting would involve undoing this process. In my case this involves dealing with a broken video driver, and that sounds like a nightmare, so I'll just wait for the bug to be fixed.