Bug#972852: gdm3: Gdm3 comes to invoke gdm-x-session at the beginning of the user session

[nozzy123nozzy at gmail.com]

Package: gdm3
Version: 3.38.1-2
Severity: grave

Dear Maintainer,
 After I upgraded my Debian box using the command of "apt upgrade" on
17th Oct 2020, I always get an "Oops! A problem occurred!" screen after
login.

 According to system logs, I seem gdm3 come to invoke gdm-x-session
always at the beginning of the user session, even though gdm3 is
running in Wayland on the login screen. Therefore gnome-shell of the
user session seems to fail.

 Does anyone fix this problem?

Thanks,
Takahide Nojima

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500,
'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.9.0-1-amd64 (SMP w/4 CPU threads)
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8),
LANGUAGE not set
Shell: /bin/sh linked to /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                                  1.12.20-1
ii  dconf-cli                             0.38.0-1
ii  dconf-gsettings-backend               0.38.0-1
ii  debconf [debconf-2.0]                 1.5.74
ii  gir1.2-gdm-1.0                        3.38.1-2
ii  gnome-session-bin                     3.38.0-2
ii  gnome-session-common                  3.38.0-2
ii  gnome-settings-daemon                 3.38.0-2
ii  gnome-shell                           3.38.1-1
ii  gnome-terminal [x-terminal-emulator]  3.38.0-1
ii  gsettings-desktop-schemas             3.38.0-2
ii  libaccountsservice0                   0.6.55-3
ii  libaudit1                             1:2.8.5-3.1
ii  libc6                                 2.31-4
ii  libcanberra-gtk3-0                    0.30-7
ii  libcanberra0                          0.30-7
ii  libgdk-pixbuf2.0-0                    2.40.0+dfsg-5
ii  libgdm1                               3.38.1-2
ii  libglib2.0-0                          2.66.1-2
ii  libglib2.0-bin                        2.66.1-2
ii  libgtk-3-0                            3.24.23-2
ii  libkeyutils1                          1.6.1-2
ii  libpam-modules                        1.3.1-5
ii  libpam-runtime                        1.3.1-5
ii  libpam-systemd                        246.6-2
ii  libpam0g                              1.3.1-5
ii  librsvg2-common                       2.50.1+dfsg-1
ii  libselinux1                           3.1-2+b1
ii  libsystemd0                           246.6-2
ii  libx11-6                              2:1.6.12-1
ii  libxau6                               1:1.0.8-1+b2
ii  libxcb1                               1.14-2
ii  libxdmcp6                             1:1.1.2-3
ii  lsb-base                              11.1.0
ii  policykit-1                           0.105-29
ii  procps                                2:3.3.16-5
ii  ucf                                   3.0043
ii  x11-common                            1:7.7+21
ii  x11-xserver-utils                     7.7+8

Versions of packages gdm3 recommends:
ii  at-spi2-core    2.38.0-2
ii  desktop-base    10.0.3
ii  x11-xkb-utils   7.7+5
ii  xserver-xephyr  2:1.20.9-2
ii  xserver-xorg    1:7.7+21
ii  zenity          3.32.0-6

Versions of packages gdm3 suggests:
ii  gnome-orca            3.38.0-1
pn  libpam-fprintd        <none>
ii  libpam-gnome-keyring  3.36.0-1

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