This bug report conflates several distinct bugs, some of which are fixed. For a period of time in oneiric lightdm was attempting to set extended displays and was doing so incorrectly, resulting in a corrupted external display. We believe this particular issue is resolved in the oneiric release.
In some of the dupe bugs it is mentioned that lightdm mirrors the external display, resulting in a smaller resolution on both screens, such as 1024x768. This is a known issue, bug #874241. Jane mentions in her bug report some irregularities in the display when switching from the login session to the user session. These are transitory and go away once logged in, but they look poor. This only occurs when the logged in session differs from the login screen and X needs to perform a modeset; unfortunately this is a typical situation for docking stations or laptops with external monitors. I will undupe Jane's bug #850885 to focus on that part of the problem. For Daniel's issue, it's hard to say what's going on there given only a screenshot, but the conditions of reproducing it are completely different than the other bugs (i.e. on logout rather than login), and it is with a very different driver setup than everyone else so it's likely to be completely unrelated. Daniel, if you can still reproduce it under Precise please file a new bug report. Since I think the crux of this original report (and the balance of the dupes) was the first listed issue, which should be solved now, I'm going to close out this bug report. If anyone thinks they have this same problem, we'd ask that you file *new* bug reports (`ubuntu-bug lightdm`, or `ubuntu-bug xorg` as appropriate) so we get properly up to date logs. Screenshots or screen photos are very helpful as well. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/813566 Title: Greeter not displayed correctly on multi monitor setup To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/813566/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
