Bug#894098: gdm3: Success with HDMI and DisplayPort

[Bud Heal]

Package: gdm3
Followup-For: Bug #894098
X-Debbugs-Cc: budheal508 at gmail.com

Dear Maintainer,

   * What led up to the situation?
I installed the last weekly build into a Dell Precision 4600. This has DisplayPort, HDMI, VGA and the internal screen. 
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
HDMI worked in conjunction with VGA and the internal screen for Gnome and MATE. Moving the screens worked without apparent artifacts.
DisplayPort worked with the internal display. I did not wait for the screen saver to come on.
   * What was the outcome of this action? Shifting the external monitor's location showed occasional artifacts but only the kind one can accept - horizontal bars as the software adapts to the external location of the external monitor - very understandable - or briefly blanking (black) the bottom half of the internal display - perhaps indicating the hardware or its frame buffer has two banks to fill.
There are no concerns to report.

   * What outcome did you expect instead?
The operation is as expected now.

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

Kernel: Linux 6.1.0-6-amd64 (SMP w/20 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
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                              22.08.8-6
ii  adduser                                      3.131
ii  dbus [default-dbus-system-bus]               1.14.6-1
ii  dbus-bin                                     1.14.6-1
ii  dbus-daemon                                  1.14.6-1
ii  dconf-cli                                    0.40.0-4
ii  dconf-gsettings-backend                      0.40.0-4
ii  debconf [debconf-2.0]                        1.5.82
ii  gir1.2-gdm-1.0                               43.0-3
ii  gnome-session [x-session-manager]            43.0-1
ii  gnome-session-bin                            43.0-1
ii  gnome-session-common                         43.0-1
ii  gnome-session-flashback [x-session-manager]  3.46.0-1
ii  gnome-settings-daemon                        43.0-4
ii  gnome-shell                                  43.3-3
ii  gnome-terminal [x-terminal-emulator]         3.46.8-1
ii  gsettings-desktop-schemas                    43.0-1
ii  libaccountsservice0                          22.08.8-6
ii  libaudit1                                    1:3.0.9-1
ii  libc6                                        2.36-8
ii  libcanberra-gtk3-0                           0.30-10
ii  libcanberra0                                 0.30-10
ii  libgdk-pixbuf-2.0-0                          2.42.10+dfsg-1+b1
ii  libgdm1                                      43.0-3
ii  libglib2.0-0                                 2.74.6-1
ii  libglib2.0-bin                               2.74.6-1
ii  libgtk-3-0                                   3.24.37-2
ii  libgudev-1.0-0                               237-2
ii  libkeyutils1                                 1.6.3-2
ii  libpam-modules                               1.5.2-6
ii  libpam-runtime                               1.5.2-6
ii  libpam-systemd [logind]                      252.6-1
ii  libpam0g                                     1.5.2-6
ii  librsvg2-common                              2.54.5+dfsg-1
ii  libselinux1                                  3.4-1+b5
ii  libsystemd0                                  252.6-1
ii  libx11-6                                     2:1.8.4-2
ii  libxau6                                      1:1.0.9-1
ii  libxcb1                                      1.15-1
ii  libxdmcp6                                    1:1.1.2-3
ii  marco [x-window-manager]                     1.26.1-1
ii  mate-session-manager [x-session-manager]     1.26.0-1
ii  mate-terminal [x-terminal-emulator]          1.26.0-1
ii  metacity [x-window-manager]                  1:3.46.1-1
ii  polkitd                                      122-3
ii  procps                                       2:4.0.2-3
ii  systemd-sysv                                 252.6-1
ii  ucf                                          3.0043+nmu1
ii  x11-common                                   1:7.7+23
ii  x11-xserver-utils                            7.7+9+b1

Versions of packages gdm3 recommends:
ii  at-spi2-core                                 2.46.0-5
ii  desktop-base                                 12.0.5
ii  gnome-session [x-session-manager]            43.0-1
ii  gnome-session-flashback [x-session-manager]  3.46.0-1
ii  mate-session-manager [x-session-manager]     1.26.0-1
ii  x11-xkb-utils                                7.7+7
ii  xserver-xephyr                               2:21.1.7-1
ii  xserver-xorg                                 1:7.7+23
ii  zenity                                       3.44.0-1

Versions of packages gdm3 suggests:
pn  libpam-fprintd        <none>
ii  libpam-gnome-keyring  42.1-1+b1
pn  libpam-pkcs11         <none>
pn  libpam-sss            <none>
ii  orca                  43.1-1

-- debconf information excluded