After using my new setup, described in comment #23 above for the whole day I have some interesting news: whenever X restart in the second seat, the first seat is kicked out to a black screen and to go back to the its graphical interface I need to type ALT-F7.
This fact explain the problem I was seeing when the seats start, as X for second seat is called after X for the first seat. Unfortunately this makes the day-to-day use of a newer lightdm much more annoying than I originally thought, as the first seat can be kicked out to the black screen many times a day. Even worse, at least twice, when the second seat closed the section the transition of the first seat to the black screen resulted in X crashing, completely closing the section for the fist seat (and then ALT-F7 would take you a to a login screen). This is a very bad behavior as it can easily lead to data loss for the first seat user. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/976124 Title: lightdm multiseat: no login possible Status in “lightdm” package in Ubuntu: Confirmed Status in “lightdm” source package in Precise: Confirmed Bug description: I am testing a multiseat setup with precise: One XServer is running on intel graphics card, a second one is running on a DisplayLink (usb video) device. The two greeters are displayed, but without password fields shown so it is not possible to login. If auto-login is enabled in lightdm.conf multiseat works fine. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: lightdm 1.2.0-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14 Uname: Linux 3.2.0-22-generic x86_64 ApportVersion: 2.0-0ubuntu4 Architecture: amd64 Date: Sat Apr 7 20:35:52 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328) ProcEnviron: PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: lightdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/976124/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp