Ubuntu
unity-greeter package

lightdm window manager selection overshoots physical screen size

Bug #1047140 reported by Chascon
74
This bug affects 15 people
Affects Status Importance Assigned to Milestone
unity-greeter (Ubuntu)
Confirmed
High
Unassigned

Bug Description

Problem: lightdm displays excessively large

Symptoms: I can't confirm change of window manager and top menu leaks over to right hand side.

The screen is a LCD Citizen C19604HD that should run 1440x 900 at 60 Hz. Upon entering the desktop the session is also excessively large, 1224 x 768 (4:3) (apparently what's running in lightdm, as it offsets the same) and only allows a worse setting of 800 x 600 (4:3).

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: lightdm 1.3.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-13.14-generic 3.5.3
Uname: Linux 3.5.0-13-generic i686
ApportVersion: 2.5.1-0ubuntu4
Architecture: i386
Date: Thu Sep 6 23:08:10 2012
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
SourcePackage: lightdm
UpgradeStatus: Upgraded to quantal on 2012-08-18 (19 days ago)

Revision history for this message
Chascon (chascone) wrote :
Revision history for this message
Chascon (chascone) wrote :

The monitor has an active display area of 410.4 mm x 256.5 mm

Revision history for this message
Chascon (chascone) wrote :

It's a widescreen.

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in lightdm (Ubuntu):
status: New → Confirmed
Revision history for this message
3vi1 (launchpad-net-eternaldusk) wrote :

I'm seeing the same problem on my CR-48 (1280x800 screen rez, 16:10), where I've installed quite a few WMs in 12.10b1.

I can't see the confirmation button, as it's off the bottom of the screen. So, I can't change the WM.

Jack Leigh (leighman)
tags: added: regression-release
Revision history for this message
morlock (mor-lock) wrote :

I also have the problem that the dialog that allows me to choose the window manager is too large in vertical direction (because I have quite some WMs installed). Therefore, I cannot click the confirmation button and change the WM.

The session choice dialog should be scrollable!

I am on Ubuntu quantal (development branch).

Revision history for this message
Chascon (chascone) wrote :

@2vi1: Yeah, it overshoots at the bottom, too.

I found two work-arounds. From memory,

A.
1. select your wm,
2. tab (once if I recall),
3. press enter, then the dialogue window will change or go back to the log-in dialogue,
4. input your password if you haven't done so already and see yourself log into the desktop environment of your choice.

Please feel free to correct me.

B.
Another work around is to uninstall unused window managers so as to make the drop down list shorter, optimizing use of screen real estate.

Comment:
I'd like to see this fixed, but there's two temporary "solutions".

Observation:
I gather this is happening because the system's difficulty in determining my monitor's EDID, as reported at https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1047156

Side Question:
Might the system's difficulty in determining EDID drastically slow down boot up? I've run various diagnostics and my HD is fine, only one fan is out, which is noted by the Apple diagnostic. This MacBook Pro used to boot fine with prior versions of Ubuntu which didn't have this TFT issue.

Revision history for this message
Chascon (chascone) wrote :

@2vi1: Do you have the same overshooting issue once logged into your desktop environment?

Revision history for this message
Jack Leigh (leighman) wrote :

Marking importance high for WM list overshooting screen.
Has a high impact on a number of users and makes a key feature of lightdm unusable

Changed in lightdm (Ubuntu):
importance: Undecided → High
summary: - lightdm overshoots physical screen size
+ lightdm window manager selection overshoots physical screen size
Revision history for this message
Jack Leigh (leighman) wrote :

It can be reproduced by reducing the screen resolution or by installing a number of WMs.

Changed in lightdm:
status: New → Confirmed
Revision history for this message
qwach (qwach) wrote :

Still there on 13.04...

Robert Ancell (robert-ancell)
affects: lightdm → unity-greeter
affects: lightdm (Ubuntu) → unity-greeter (Ubuntu)
Revision history for this message
Xavier Lüthi (xluthi) wrote :

Still there on 13.10

Robert Ancell (robert-ancell)
no longer affects: unity-greeter
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