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

[Florian]

Package: gdm3
Version: 3.38.2.1-1
Followup-For: Bug #987040

I have now found the trigger for the locks: This always happens when I
have a sshfs connection open at the time when going to suspend. The
sshfs connection needs an established vpn, which isn't there when
returning from suspend. As soon as the user logs in (pressing "Enter"
in the screensaver dialog), the unavailable sshfs connection seems to
lock gdm3 completely. It is actually not a complete hard-lock, playing
music when going to suspend just continues after waking up and also
after gdm3 has locked.

It seems that sshfs is known to have this kind of problems (#571005),
but I guess gdm3 should not lock in this (or any) kind of situation ...


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

Kernel: Linux 5.10.0-6-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                                2:3.3.17-5
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 excluded