Bug#1119809: Black screen after upgrading from 48
Ben Hutchings
ben at decadent.org.uk
Fri Oct 31 16:58:30 GMT 2025
Package: gdm3
Version: 49.1-4
Severity: serious
I did a full-upgrade today which upgraded the gdm packages from
version 48.0-3 to 49.1-4. After rebooting, gdm did not display
anything. I was still to switch virtual terminals with Ctrl-Alt-F<n>.
Downgrading gdm3, libgdm1, and gir1.2-gdm-1.0 to the version in trixie
(48.0-2) resolved this, so this doesn't seem to be triggered by some
other dependency of gdm.
All I can see in the journal is:
Oct 31 17:35:12 deadeye systemd[1]: Starting gdm.service - GNOME Display Manager...
Oct 31 17:35:12 deadeye systemd[1]: Started gdm.service - GNOME Display Manager.
Oct 31 17:35:12 deadeye gdm-launch-environment][2863]: pam_unix(gdm-launch-environment:session): session opened for user gdm-greeter(uid=60578) by (uid=0)
Oct 31 17:35:44 deadeye gdm3[2689]: Gdm: GdmDisplay: Session never registered, failing
Oct 31 17:35:44 deadeye gdm3[2689]: Gdm: Child process -3016 was already dead.
Oct 31 17:35:44 deadeye gdm3[2689]: Gdm: GdmDisplay: Session never registered, failing
Oct 31 17:35:44 deadeye gdm3[2689]: Gdm: Child process -3016 was already dead.
Oct 31 17:35:44 deadeye gdm-launch-environment][3894]: pam_unix(gdm-launch-environment:session): session opened for user gdm-greeter-2(uid=60579) by (uid=0)
Oct 31 17:38:43 deadeye systemd[1]: Stopping gdm.service - GNOME Display Manager...
Oct 31 17:38:43 deadeye gdm3[2689]: Gdm: Child process -3974 was already dead.
Oct 31 17:38:43 deadeye systemd[1]: gdm.service: Deactivated successfully.
Oct 31 17:38:43 deadeye systemd[1]: Stopped gdm.service - GNOME Display Manager.
Oct 31 17:38:54 deadeye systemd[1]: Starting gdm.service - GNOME Display Manager...
Oct 31 17:38:55 deadeye systemd[1]: Started gdm.service - GNOME Display Manager.
Oct 31 17:38:55 deadeye gdm-launch-environment][5604]: pam_unix(gdm-launch-environment:session): session opened for user gdm-greeter(uid=60578) by (uid=0)
Let me know what additional information you need.
Ben.
-- System Information:
Debian Release: forky/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'stable-security'), (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 6.16.12+deb14+1-amd64 (SMP w/12 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.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 23.13.9-8
ii adduser 3.153
ii dbus [default-dbus-system-bus] 1.16.2-2
ii dbus-bin 1.16.2-2
ii dbus-daemon 1.16.2-2
ii dconf-cli 0.49.0-2
ii dconf-gsettings-backend 0.49.0-2
ii debconf [debconf-2.0] 1.5.91
ii gir1.2-gdm-1.0 49.1-4
ii gnome-classic [x-session-manager] 49.0-2
ii gnome-session [x-session-manager] 48.0-2
ii gnome-session-bin 48.0-2
ii gnome-session-common 48.0-2
ii gnome-session-xsession [x-session-manager] 48.0-2
ii gnome-settings-daemon 48.1-2
ii gnome-shell 48.5-3
ii gnome-terminal [x-terminal-emulator] 3.58.0-1
ii gsettings-desktop-schemas 49.1-1
ii konsole [x-terminal-emulator] 4:25.04.2-1
ii kwin-x11 [x-window-manager] 4:6.5.1-1
ii libaccountsservice0 23.13.9-8
ii libaudit1 1:4.1.2-1
ii libc6 2.41-12
ii libgdk-pixbuf-2.0-0 2.44.4+dfsg-1
ii libgdm1 49.1-4
ii libglib2.0-0t64 2.86.1-1
ii libglib2.0-bin 2.86.1-1
ii libgtk-3-0t64 3.24.51-1
ii libgudev-1.0-0 238-7
ii libjson-glib-1.0-0 1.10.8+ds-1
ii libkeyutils1 1.6.3-6
ii libpam-modules 1.7.0-5
ii libpam-runtime 1.7.0-5
ii libpam-systemd [logind] 258.1-2
ii libpam0g 1.7.0-5
ii librsvg2-common 2.60.0+dfsg-1+b1
ii libselinux1 3.9-2
ii libsystemd0 258.1-2
ii libx11-6 2:1.8.12-1
ii libxau6 1:1.0.11-1
ii libxcb1 1.17.0-2+b1
ii libxdmcp6 1:1.1.5-1
ii metacity [x-window-manager] 1:3.58.1-1
ii mutter [x-window-manager] 48.5-1
ii plasma-workspace [x-session-manager] 4:6.5.1-1
ii polkitd 126-2
ii procps 2:4.0.4-9
ii ptyxis [x-terminal-emulator] 49.2-1
ii rxvt-unicode [x-terminal-emulator] 9.31-3+b2
ii systemd-sysv 258.1-2
ii ucf 3.0052
ii x11-common 1:7.7+26
ii x11-xserver-utils 7.7+11
ii xterm [x-terminal-emulator] 402-1
Versions of packages gdm3 recommends:
ii at-spi2-core 2.58.1-1
ii desktop-base 14.0.0~pre2
ii gnome-classic [x-session-manager] 49.0-2
ii gnome-session [x-session-manager] 48.0-2
ii gnome-session-xsession [x-session-manager] 48.0-2
ii plasma-workspace [x-session-manager] 4:6.5.1-1
ii x11-xkb-utils 7.7+9
ii xserver-xephyr 2:21.1.20-1
ii xserver-xorg 1:7.7+26
ii zenity 4.1.99-1
Versions of packages gdm3 suggests:
pn libpam-fprintd <none>
ii libpam-gnome-keyring 48.0-4
pn libpam-pkcs11 <none>
pn libpam-sss <none>
ii orca 49.4-1
-- debconf-show failed
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