ligthdm does not use correct display resolution when two screen are connected

[Séverin Lemaignan]

I'm running Ubuntu on a laptop (nominal resolution 1440x900) with another monitor connected (1920x1080).

The laptop display is broken, and I only use the other monitor.

It seems that ligthdm uses the laptop native resolution (1440x900) instead of the monitor native resolution (1920x1080).

As long as possible, lightdm should use native resolution for each screen.

Side effect: once logged in, the correct resolution is applied (laptop display -> disabled, external monitor -> 1920x1080), but the transition causes an artifact: after the resolution is set to 1920x1080, but before the wallpaper is displayed, the lightdm background get tiled to cover the whole screen surface, which looks strange.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: lightdm 0.9.3-0ubuntu8
ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
Uname: Linux 3.0.0-10-generic i686
Architecture: i386
Date: Sun Sep 4 22:00:29 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=fr:en
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 LC_MESSAGES=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: Upgraded to oneiric on 2011-09-02 (2 days ago)

[jpfle (jpfle)]

Same problem here with LightDM 0.9.5.