Comment 33 for bug 3731

For Feisty, xresprobe is not included in the default installation. In theory, this should not be an issue for most people, however I think for people who don't have xresprobe installed, if they reconfigure Xorg then the new xorg.conf file could result in incomplete monitor detection, and thus lead to this bug. This could also occur if the user installed a new monitor or video card and re-ran `sudo dpkg-reconfigure xserver-xorg` without first installing xresprobe. It could also occur if a user upgrades from Edgy or Dapper to Feisty, and xresprobe gets uninstalled, and then the user reconfigures xorg. As I understand, this was a unique change for Feisty, and wouldn't affect Edgy or Dapper users since as I understand xresprobe was installed by default in those.

For gutsy we've altered things such that xresprobe is once again installed by default, so behavior should at least return to where it was with Edgy and Dapper. In at least one dupe of this bug, having xresprobe present seems to have helped. See bug 109908.

However, this change only gives us a partial fix; I know there are additional problems with xresprobe that will crop up even with it installed.