Login screen forces same resolution on all displays in non-identical multi-display setup
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
lightdm (Ubuntu) |
Incomplete
|
Low
|
Unassigned |
Bug Description
In a multi-display setup where displays have different resolutions (e.g. external display connected to laptop), the login screen forces the same resolution on both displays. For example in my setup I have a laptop with a 16:9 ratio and an external screen with a 4:3 ratio. The background appears on both displays and the login box appears on the laptop's built-in display. However, both displays are forced to a 4:3 resolution that only fits the external screen.
Steps to reproduce:
1. Connect an external display to a laptop with different ratio (e.g. 16:9 laptop and 4:3 external display)
2. Start the laptop
3. The login screen appears
Expected behaviour:
Each display shows an image that is scaled according to their individual resolutions
Actual behaviour:
Both displays are forced to a degraded resolution that can be displayed by both. E.g. in my case the laptop has a max resolution of 1366x768 while the external display has a max resolution of 1280x1024: the resolution used by the login screen is 1024x768 i.e. a 4:3 resolution (like the external display) but with 768 vertical resolution (which is the max vertical resolution of the laptop).
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: lightdm 1.2.1-0ubuntu1
ProcVersionSign
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Fri May 11 21:46:20 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
ProcEnviron:
LANGUAGE=en_GB:en
TERM=xterm
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: Upgraded to precise on 2012-02-11 (90 days ago)
Note that this bug may be related to bug #997803 which occurs with the unlock screen.