LP#1738988 "lightdm-gtk-greeter-settings incompatible with wayland"

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Reported first on Launchpad at https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter-settings/+bug/1738988

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LP#0: PeterPall (peterpall) wrote on 2017-12-19:

As a security measure wayland allows programs either to connect to the display or to be root: If a program needs root rights to do part of its work it can use packagekit in order to give this specific portion of the program root rights.

lightdm-gtk-greeter-settings both wants root rights and wants to connect to the display - and therefore is denied the latter.

ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: lightdm-gtk-greeter-settings 1.2.1-2 Uname: Linux 4.15.0-041500rc4-lowlatency x86_64 ApportVersion: 2.20.8-0ubuntu5 Architecture: amd64 CurrentDesktop: GNOME Date: Tue Dec 19 10:40:50 2017 EcryptfsInUse: Yes PackageArchitecture: all SourcePackage: lightdm-gtk-greeter-settings UpgradeStatus: No upgrade log present (probably fresh install)

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LP#1: PeterPall (peterpall) wrote on 2017-12-19:

Attachments:

• Dependencies.txt
• JournalErrors.txt
• ProcCpuinfoMinimal.txt
• ProcEnviron.txt

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LP#2: James Lu (tacocat) wrote on 2017-12-20:

Hi,

This is a duplicate of https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter-settings/+bug/1713313

I would mark it as such but Launchpad isn't being cooperative and giving me timeout errors.

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LP#3: PeterPall (peterpall) wrote on 2018-08-06:

I don't believe #1713313 is an actual bug: Giving noone with root access access to the GUI is part of one of the major features wayland was created for: Hindering a gui application from spying on the screen or the keyboard input of another application.