Bug#987040: gdm3: Sometimes system locks hard after entering password

[Florian]

Package: gdm3
Version: 3.38.2.1-1
Severity: important

This has happened now two times within a week or so (never happened before) on an up-to-date debian testing
system.

* Waking up from suspend
* Entering password on login-screen and press enter
* System freezes completely (can't change to terminal, no mouse pointer reaction, etc)
* Only reboot helps, loosing work in suspended session

Maybe it is related to entering the wrong PW the first time, and after
entering the correct one it freezes (but I am not 100% certain whether
that was also the case last time it happened).

There is (to my eyes) nothing suspicious in the syslog before the
crash (a lot of annoying tracker messages flooding the log, but that
seems to be "normal").

Unfortunately/fortunately I have not yet found a way to reliably
reproduce it.

Thanks, Florian


-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-security'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-5-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
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 gdm3 depends on:
ii  accountsservice                       0.6.55-3
ii  adduser                               3.118
ii  dbus                                  1.12.20-2
ii  dconf-cli                             0.38.0-2
ii  dconf-gsettings-backend               0.38.0-2
ii  debconf [debconf-2.0]                 1.5.75
ii  gir1.2-gdm-1.0                        3.38.2.1-1
ii  gnome-session [x-session-manager]     3.38.0-4
ii  gnome-session-bin                     3.38.0-4
ii  gnome-session-common                  3.38.0-4
ii  gnome-settings-daemon                 3.38.1-3
ii  gnome-shell                           3.38.4-1
ii  gnome-terminal [x-terminal-emulator]  3.38.3-1
ii  gsettings-desktop-schemas             3.38.0-2
ii  libaccountsservice0                   0.6.55-3
ii  libaudit1                             1:3.0-2
ii  libc6                                 2.31-11
ii  libcanberra-gtk3-0                    0.30-7
ii  libcanberra0                          0.30-7
ii  libgdk-pixbuf-2.0-0                   2.42.2+dfsg-1
ii  libgdm1                               3.38.2.1-1
ii  libglib2.0-0                          2.66.8-1
ii  libglib2.0-bin                        2.66.8-1
ii  libgtk-3-0                            3.24.24-3
ii  libkeyutils1                          1.6.1-2
ii  libpam-modules                        1.4.0-7
ii  libpam-runtime                        1.4.0-7
ii  libpam-systemd                        247.3-3
ii  libpam0g                              1.4.0-7
ii  librsvg2-common                       2.50.3+dfsg-1
ii  libselinux1                           3.1-3
ii  libsystemd0                           247.3-3
ii  libx11-6                              2:1.7.0-2
ii  libxau6                               1:1.0.9-1
ii  libxcb1                               1.14-3
ii  libxdmcp6                             1:1.1.2-3
ii  lsb-base                              11.1.0
ii  mutter [x-window-manager]             3.38.4-1
ii  policykit-1                           0.105-30
ii  procps                                2:3.3.17-4
ii  ucf                                   3.0043
ii  x11-common                            1:7.7+22
ii  x11-xserver-utils                     7.7+8

Versions of packages gdm3 recommends:
ii  at-spi2-core    2.38.0-2
ii  desktop-base    11.0.3
ii  x11-xkb-utils   7.7+5
ii  xserver-xephyr  2:1.20.10-3
ii  xserver-xorg    1:7.7+22
ii  zenity          3.32.0-6

Versions of packages gdm3 suggests:
pn  gnome-orca            <none>
pn  libpam-fprintd        <none>
ii  libpam-gnome-keyring  3.36.0-1

-- debconf information:
* shared/default-x-display-manager: gdm3
  gdm3/daemon_name: /usr/sbin/gdm3