Bug#889505: gdm3: randomly prevents user switch

[Daniel]

Package: gdm3
Version: 3.22.3-3+deb9u1
Severity: important

Dear Maintainer,

after upgrading to stretch user switch (with gnome-shell and gdm3) became
almost unusable:
sometimes it will work, sometimes it will just give me the password prompt of
the user I'm trying to switch away from instead of the login screen, and
sometimes it will just give me the lock screen and I won't be able to login
with any user until I suspend and resume the system once or twice.
(When this happens, pressing enter gives me a fraction of a seconds worth of
flickering to he login screen and back to the lock screen.)

Thanks, Daniel



-- System Information:
Debian Release: 9.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-0.bpo.3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gdm3 depends on:
ii  accountsservice                              0.6.43-1
ii  adduser                                      3.115
ii  dconf-cli                                    0.26.0-2+b1
ii  dconf-gsettings-backend                      0.26.0-2+b1
ii  debconf [debconf-2.0]                        1.5.61
ii  gir1.2-gdm-1.0                               3.22.3-3+deb9u1
ii  gnome-session [x-session-manager]            3.22.3-1
ii  gnome-session-bin                            3.22.3-1
ii  gnome-session-flashback [x-session-manager]  3.22.0-3
ii  gnome-settings-daemon                        3.22.2-2+deb9u2
ii  gnome-shell                                  3.22.3-3
ii  gnome-terminal [x-terminal-emulator]         3.22.2-1
ii  gsettings-desktop-schemas                    3.22.0-1
ii  konsole [x-terminal-emulator]                4:16.12.0-4
ii  libaccountsservice0                          0.6.43-1
ii  libaudit1                                    1:2.6.7-2
ii  libc6                                        2.24-11+deb9u1
ii  libcanberra-gtk3-0                           0.30-3
ii  libcanberra0                                 0.30-3
ii  libgdk-pixbuf2.0-0                           2.36.5-2+deb9u2
ii  libgdm1                                      3.22.3-3+deb9u1
ii  libglib2.0-0                                 2.50.3-2
ii  libglib2.0-bin                               2.50.3-2
ii  libgtk-3-0                                   3.22.11-1
ii  libkeyutils1                                 1.5.9-9
ii  libpam-modules                               1.1.8-3.6
ii  libpam-runtime                               1.1.8-3.6
ii  libpam-systemd                               232-25+deb9u1
ii  libpam0g                                     1.1.8-3.6
ii  librsvg2-common                              2.40.16-1+b1
ii  libselinux1                                  2.6-3+b3
ii  libsystemd0                                  232-25+deb9u1
ii  libwrap0                                     7.6.q-26
ii  libx11-6                                     2:1.6.4-3
ii  libxau6                                      1:1.0.8-1
ii  libxcb1                                      1.12-1
ii  libxdmcp6                                    1:1.1.2-3
ii  lsb-base                                     9.20161125
ii  metacity [x-window-manager]                  1:3.22.1-1
ii  mutter [x-window-manager]                    3.22.3-2
ii  policykit-1                                  0.105-18
ii  ucf                                          3.0036
ii  x11-common                                   1:7.7+19
ii  x11-xserver-utils                            7.7+7+b1
ii  xfce4-session [x-session-manager]            4.12.1-5
ii  xfce4-terminal [x-terminal-emulator]         0.8.3-1
ii  xfwm4 [x-window-manager]                     4.12.4-1
ii  xterm [x-terminal-emulator]                  327-2

Versions of packages gdm3 recommends:
ii  at-spi2-core    2.22.0-6+deb9u1
ii  desktop-base    9.0.2+deb9u1
ii  x11-xkb-utils   7.7+3+b1
ii  xserver-xephyr  2:1.19.2-1+deb9u2
ii  xserver-xorg    1:7.7+19
ii  zenity          3.22.0-1+b1

Versions of packages gdm3 suggests:
ii  gnome-orca            3.22.2-3
ii  libpam-gnome-keyring  3.20.0-3

-- debconf information excluded