Resolved with this commit. User images provided by AccountsService were scaled
while default images were not.
http://bazaar.launchpad.net/~lightdm-gtk-greeter-team/lightdm-gtk-greeter/trunk/revision/366
** Changed in: lightdm-gtk-greeter-settings
Status: Confirmed => Invalid
** Changed in: lightdm-gtk-greeter
Status: New => Fix Committed
** Also affects: lightdm-gtk-greeter (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: lightdm-gtk-greeter-settings
** No longer affects: lightdm-gtk-greeter-settings (Ubuntu)
** Changed in: lightdm-gtk-greeter (Ubuntu)
Status: New => Confirmed
** Changed in: lightdm-gtk-greeter (Ubuntu)
Importance: Undecided => Critical
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greeter in Ubuntu.
https://bugs.launchpad.net/bugs/1512963
Title:
settings allow arbitrarily large user pictures which makes the user
lock themselves out at lightdm.
Status in LightDM GTK+ Greeter:
Fix Committed
Status in lightdm-gtk-greeter package in Ubuntu:
Confirmed
Bug description:
To reproduce on a fresh install of ubuntu mate 16.04 start lightdm-
gtk-greeter-settings and authenticate to start editing lightdm
settings. Please do not try to reproduce this on a production machine
as it will involve locking yourself out of lightdm.
In the settings for lightdm GTK+ greeter settings select a really
large image from a digial camera or high resolution screenshot as your
user image that is larger than your screen resolution hit save and
then log out.
You will be taken to a lightdm screen that has a user image so large
you cannot login.
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04
lightdm-gtk-greeter-settings:
Installed: 1.2.0-0ubuntu1
Candidate: 1.2.0-0ubuntu1
Version table:
*** 1.2.0-0ubuntu1 0
500 http://us.archive.ubuntu.com/ubuntu/ xenial/universe amd64
Packages
100 /var/lib/dpkg/status
I would expect the greeter to check that it would not set such
redicolous file sizes that block the user from logging in or at least
provide a warning dialog that this could make you unable to login
similar to things that cause data loss on a partition in ubuquity or
gparted.
As this prevents even loggin into guest session graphically. I did
manage to get back in editing /etc/lightdm/lightdm-gtk-greeter.conf by
hand with vim.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lightdm-gtk-greeter-settings 1.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.2-0ubuntu1
Architecture: amd64
CurrentDesktop: MATE
Date: Tue Nov 3 22:51:13 2015
InstallationDate: Installed on 2015-11-03 (0 days ago)
InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64
(20151103)
PackageArchitecture: all
SourcePackage: lightdm-gtk-greeter-settings
UpgradeStatus: No upgrade log present (probably fresh install)
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