[Bug 1964401] Re: Software Sources/software-properties-qt privilege escalation not accepting password

[Jan Rathmann]

Can reproduce when booting kubuntu-22.04-desktop-amd64.iso in Virtualbox
and on my main installation of Kubuntu 22.04.

Happens both on X11 and Wayland session.

When I try to go to software-sources via Discover or Muon on the live
image (where no user password is set), it simply doesn't launch.

Terminal output of 'pkexec software-properties-qt':

qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl,
offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-
xcomposite-glx, xcb.

Aborted (core dumped)

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https://bugs.launchpad.net/bugs/1964401

Title:
  Software Sources/software-properties-qt privilege escalation not
  accepting password

Status in plasma-discover package in Ubuntu:
  Confirmed
Status in software-properties package in Ubuntu:
  New

Bug description:
  1) lsb_release -rd
  Description:    Ubuntu Jammy Jellyfish (development branch)
  Release:        22.04

  2) package version - apt-cache policy pkgname'

  plasma-discover:
    Installed: 5.24.2.1-0ubuntu1

  software-properties-qt:
    Installed: 0.99.19

  3) expected to happen
  * In Discover: Settings > Software Sources
  * opens a privilege escalation dialogue
  * enter user password
  * software-properties-qt opens

  4) happened instead
  * In Discover: Settings > Software Sources
  * opens a privilege escalation dialogue
  * insert known-correct user password
  * **does not accept known-correct user password**

  # Additional Info
  Note: described behaviour is for a post 20.04->22.04 devel daily upgrade found during a QA Testcase. Behaviour exists, but has slightly different symptoms in a virgin live 22.04 daily session (see below)

  * launching from terminal works as expected
  sudo software-properties-qt

  ## process & errors - post 20.04->22.04 devel daily upgrade
  * running Discover from terminal
  	$ plasma-discover

  * Settings > Software Sources 
  gives error on terminal:
  > org.kde.kdesu: Daemon not safe (not sgid), not using it.

  * insert known-correct user password
  gives error on terminal:
  > kf.su: [ ./src/stubprocess.cpp : 225 ]  Unknown request: "stop"
  > end

  * close password window
  gives error on terminal

  > Usage: /usr/lib/x86_64-linux-gnu/libexec/kf5/kdesu [options] command
  > Runs a program with elevated privileges.

  > Options:
  >   -h, --help                 Displays help on commandline options.
  > [...]

  ## process & errors - live Kubuntu 22.04 daily

  similar behaviour, hoever password-asking window never appears.
  Terminal errors differ from above:

  * Settings > Software Sources 
  gives error on terminal:
  > org.kde.kdesu: Daemon not safe (not sgid), not using it.
  >
  > Don't need password!!
  >
  >kf.su: [./src/stubprocess.cpp : 255 ]  Unknown request: "ok"
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu78
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 22.04
  InstallationDate: Installed on 2022-03-07 (2 days ago)
  InstallationMedia: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1)
  Package: plasma-discover 5.24.2.1-0ubuntu1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 5.15.0-18.18-generic 5.15.12
  Tags: jammy third-party-packages
  Uname: Linux 5.15.0-18-generic x86_64
  UpgradeStatus: Upgraded to jammy on 2022-03-07 (2 days ago)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True

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