Bug#1034655: lightdm: Login dialog after resuming from standby should match xflock4

[Stefan Tauner <stefan.tauner@gmx.at>]

Package: lightdm
Version: 1.26.0-8
Severity: normal
X-Debbugs-Cc: stefan.tauner@gmx.at

Dear Maintainer,

since I am using autologin (because I am using FDE and have to unlock the OS
before boot anyway)
there are usually only two ways to interact with the lightdm: after locking the
session with xflock4
and after resuming from standby. While the UI behaves as I which after locking
manually it does not
when resuming: I'd like to simply enter my password to unlock the session after
resume but the UI is
blank in that case instead of having the username predefined and the focus on
the password field.
Objectively, this is a minor thing but for me it's about 50% of my interactions
:)

It's also a regression IMhO - at least in Debian 10 this worked perfectly (I
kinda skipped 11).
I presume the behavior is due to lightdm itself but maybe it is because of how
the session gets
locked when entering suspend (which is via systemctl suspend)?
The only changes I made to lightdm.conf are setting autologin-user to my
username and
autologin-user-timeout=0. This is a pretty fresh install of Bookworm.

KR


-- System Information:
Debian Release: 12.0
  APT prefers testing-security
  APT policy: (500, 'testing-security'), (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.0-7-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lightdm depends on:
ii  adduser                                3.132
ii  dbus                                   1.14.6-1
ii  debconf [debconf-2.0]                  1.5.82
ii  libaudit1                              1:3.0.9-1
ii  libc6                                  2.36-9
ii  libgcrypt20                            1.10.1-3
ii  libglib2.0-0                           2.74.6-2
ii  libpam-systemd [logind]                252.6-1
ii  libpam0g                               1.5.2-6
ii  libxcb1                                1.15-1
ii  libxdmcp6                              1:1.1.2-3
ii  lightdm-gtk-greeter [lightdm-greeter]  2.0.8-2+b1
ii  sysvinit-utils [lsb-base]              3.06-4

Versions of packages lightdm recommends:
ii  xserver-xorg  1:7.7+23

Versions of packages lightdm suggests:
pn  accountsservice  <none>
ii  upower           0.99.20-2
pn  xserver-xephyr   <none>

-- Configuration Files:
/etc/lightdm/lightdm.conf changed [not included]

-- debconf information:
  lightdm/daemon_name: /usr/sbin/lightdm
* shared/default-x-display-manager: lightdm