Jtdcftul

The gdm3 login screen GUI is broken with odd graphical artifacts and colors. The input field is also often not visible/obscured, but I am able to blindly log into the desktop via Enter > password, and the Gnome DE appears ok. It appears that part of the problem is the missing usr/share/gnome-shell/theme/assets/login-background.jpg file per the syslog output below. Don't know if the additional gnome-shell JS errors are relevant. There is no assets directory at all, the css and svg files live in usr/share/gnome-shell/theme along with some symbolic links to custom themes I installed. No login-background.jpg file anywhere on the system in fact.

Reading other gdm3 questions, I've seen recommendations to reinstall gnome-shell-common to restore gdm3 files but other feedback indicates broken login/themes/etc. with this approach. How can I safely resolve this? Thanks

Syslog:

Mar  3 12:41:12 ubu-desk org.gnome.Shell.desktop[2139]: [2641:2641:0303/124112.997066:ERROR:media_internals.cc(112)] Cannot get RenderProcessHost

Mar  3 12:41:14 ubu-desk gnome-shell[2139]: JS ERROR: Exception in callback for signal: activate: Error: Error invoking IBus.set_global_engine_async:

Expected function for callback argument callback, got undefined#012setEngine@resource:///org/gnome/shell/misc/ibusManager.js:207:

9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012activateInputSource@resource:///org/gnome/shell/ui/status/keyboard.js:490:13#012wrapper@

resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_emit@resource:///org/gnome/gjs/modules/signals.js:128:27#012activate@

resource:///org/gnome/shell/ui/status/keyboard.js:65:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_inputSourcesChanged@

resource:///org/gnome/shell/ui/status/keyboard.js:620:13#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012reload@

resource:///org/gnome/shell/ui/status/keyboard.js:369:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_ibusSetContentType@

resource:///org/gnome/shell/ui/status/keyboard.js:691:9#012wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22#012_emit@

resource:///org/gnome/gjs/modules/signals.js:128:27#012_setContentType@resource:///org/gnome/shell/misc/ibusManager.js:183:9#012wrapper@

resource:///org/gnome/gjs/modules/_legacy.js:82:22

[...]

Mar  3 12:43:35 ubu-desk gnome-shell[1522]: Failed to load file:///usr/share/gnome-shell/theme/assets/login-background.jpg: Error opening file /usr/share/gnome-shell/theme/assets/login-background.jpg: No such file or directory

Mar  3 12:43:36 ubu-desk gnome-shell[1522]: message repeated 6 times: [ Failed to load file:///usr/share/gnome-shell/theme/assets/login-background.jpg: Error opening file /usr/share/gnome-shell/theme/assets/login-background.jpg: No such file or directory]

Mar  3 12:43:36 ubu-desk gsd-color[1780]: failed to set screen _ICC_PROFILE: Failed to open file “/home/user/.local/share/icc/edid-c1a0cd69078353a118ddc74a6c339113.icc”: Permission denied

System:

Ubuntu 18.04.2 LTS (up-to-date)

4.18.0-15-generic  (via 18.04.2 HWE stack)



gdm3            3.28.3-0ubuntu18.04.4

gir1.2-gdm-1.0          3.28.3-0ubuntu18.04.4

libgdm1             3.28.3-0ubuntu18.04.4

gnome-control-center        1:3.28.2-0ubuntu0.18.04.2

gnome-initial-setup     3.28.0-2ubuntu6.16.04.4

gnome-menus         3.13.3-11ubuntu1.1

gnome-session-bin       3.28.1-0ubuntu3

gnome-session-canberra      0.30-5ubuntu1

gnome-session-common        3.28.1-0ubuntu3

gnome-settings-daemon       3.28.1-0ubuntu1.1

gnome-settings-daemon-schemas   3.28.1-0ubuntu1.1

gnome-shell         3.28.3-0ubuntu0.18.04.4

gnome-shell-common      3.28.3-0ubuntu0.18.04.4

gnome-shell-extension-appindicator  18.04.1

gnome-shell-extension-ubuntu-dock   0.9.1ubuntu18.04.3

gnome-shell-extensions      3.28.0-2

gnome-software          3.28.1-0ubuntu4.18.04.8

gnome-software-common       3.28.1-0ubuntu4.18.04.8

gnome-software-plugin-snap  3.28.1-0ubuntu4.18.04.8

gnome-themes-extra      3.28-1ubuntu1

gnome-themes-extra-data     3.28-1ubuntu1

gnome-themes-standard       3.28-1ubuntu1

gnome-tweaks            3.28.1-1

Additional info as requested:

$ sudo systemctl status colord

colord.service - Manage, Install and Generate Color Profiles

   Loaded: loaded (/lib/systemd/system/colord.service; static; vendor preset: enabled)

   Active: active (running) since Sun 2019-03-03 18:27:36 EST; 29min ago

 Main PID: 1869 (colord)

    Tasks: 3 (limit: 4915)

   CGroup: /system.slice/colord.service

           └─1869 /usr/lib/colord/colord



Mar 03 18:27:36 ubu-desk systemd[1]: Starting Manage, Install and Generate Color Profiles...

Mar 03 18:27:36 ubu-desk systemd[1]: Started Manage, Install and Generate Color Profiles.





$ grep -i colord /var/log/syslog*

/var/log/syslog:Mar  3 11:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 11:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 12:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 12:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 13:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 13:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 14:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 14:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 15:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 15:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 16:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 16:17:59 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 17:25:55 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 17:25:55 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 18:25:55 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA: Error opening directory '/var/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-MZlaaA': Permission denied

/var/log/syslog:Mar  3 18:25:55 ubu-desk gsd-housekeepin[2306]: Failed to enumerate children of /tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts: Error opening directory '/tmp/systemd-private-3ac79b469d814451abc7a94863fa97be-colord.service-9wCBts': Permission denied

/var/log/syslog:Mar  3 18:27:36 ubu-desk dbus-daemon[1334]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.64' (uid=121 pid=1727 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 10:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a: Error opening directory '/var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a': Permission denied

/var/log/syslog.1:Mar  2 10:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo: Error opening directory '/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo': Permission denied

/var/log/syslog.1:Mar  2 11:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a: Error opening directory '/var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a': Permission denied

/var/log/syslog.1:Mar  2 11:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo: Error opening directory '/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo': Permission denied

/var/log/syslog.1:Mar  2 12:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a: Error opening directory '/var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a': Permission denied

/var/log/syslog.1:Mar  2 12:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo: Error opening directory '/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo': Permission denied

/var/log/syslog.1:Mar  2 13:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a: Error opening directory '/var/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-h3RI7a': Permission denied

/var/log/syslog.1:Mar  2 13:42:38 ubu-desk gsd-housekeepin[5923]: Failed to enumerate children of /tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo: Error opening directory '/tmp/systemd-private-16d192ca05624438bf88c70ad69b98dd-colord.service-mpE8qo': Permission denied

/var/log/syslog.1:Mar  2 14:35:00 ubu-desk dbus-daemon[1388]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.65' (uid=121 pid=1834 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 15:28:21 ubu-desk dbus-daemon[1405]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.67' (uid=121 pid=1841 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 16:28:32 ubu-desk gsd-housekeepin[2361]: Failed to enumerate children of /var/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-YuKHaY: Error opening directory '/var/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-YuKHaY': Permission denied

/var/log/syslog.1:Mar  2 16:28:32 ubu-desk gsd-housekeepin[2361]: Failed to enumerate children of /tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-DdQmvQ: Error opening directory '/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-DdQmvQ': Permission denied

/var/log/syslog.1:Mar  2 17:28:32 ubu-desk gsd-housekeepin[2361]: Failed to enumerate children of /var/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-YuKHaY: Error opening directory '/var/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-YuKHaY': Permission denied

/var/log/syslog.1:Mar  2 17:28:32 ubu-desk gsd-housekeepin[2361]: Failed to enumerate children of /tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-DdQmvQ: Error opening directory '/tmp/systemd-private-c8588750b47b4c078b0d7d3099120320-colord.service-DdQmvQ': Permission denied

/var/log/syslog.1:Mar  2 18:21:43 ubu-desk dbus-daemon[1470]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.68' (uid=121 pid=1881 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 18:23:06 ubu-desk dbus-daemon[1472]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.66' (uid=121 pid=1882 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 18:25:42 ubu-desk dbus-daemon[1399]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.65' (uid=121 pid=1839 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 19:18:17 ubu-desk dbus-daemon[1457]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.66' (uid=121 pid=3187 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 19:27:17 ubu-desk dbus-daemon[1383]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.65' (uid=121 pid=1820 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 19:41:18 ubu-desk dbus-daemon[1442]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.62' (uid=121 pid=1802 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 20:18:15 ubu-desk dbus-daemon[1435]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.64' (uid=121 pid=1863 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 20:22:28 ubu-desk dbus-daemon[1307]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.63' (uid=121 pid=1650 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 20:22:28 ubu-desk colord-sane: [bjnp] create_broadcast_socket: ERROR - bind socket to local address failed - Cannot assign requested address

/var/log/syslog.1:Mar  2 20:40:50 ubu-desk dbus-daemon[1316]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.63' (uid=121 pid=1711 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 21:04:36 ubu-desk dbus-daemon[1301]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.64' (uid=121 pid=1712 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 21:09:15 ubu-desk dbus-daemon[1293]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.65' (uid=121 pid=1650 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 21:09:15 ubu-desk colord-sane: [bjnp] create_broadcast_socket: ERROR - bind socket to local address failed - Cannot assign requested address

/var/log/syslog.1:Mar  2 22:09:22 ubu-desk gsd-housekeepin[2237]: Failed to enumerate children of /var/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-hPnkcl: Error opening directory '/var/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-hPnkcl': Permission denied

/var/log/syslog.1:Mar  2 22:09:22 ubu-desk gsd-housekeepin[2237]: Failed to enumerate children of /tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-qAVab7: Error opening directory '/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-qAVab7': Permission denied

/var/log/syslog.1:Mar  2 23:09:22 ubu-desk gsd-housekeepin[2237]: Failed to enumerate children of /var/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-hPnkcl: Error opening directory '/var/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-hPnkcl': Permission denied

/var/log/syslog.1:Mar  2 23:09:22 ubu-desk gsd-housekeepin[2237]: Failed to enumerate children of /tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-qAVab7: Error opening directory '/tmp/systemd-private-708805c760d842af870d2f82461f9971-colord.service-qAVab7': Permission denied

/var/log/syslog.1:Mar  2 23:40:33 ubu-desk dbus-daemon[1299]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.63' (uid=121 pid=1730 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  2 23:40:33 ubu-desk colord-sane: [bjnp] create_broadcast_socket: ERROR - bind socket to local address failed - Cannot assign requested address

/var/log/syslog.1:Mar  3 10:17:39 ubu-desk dbus-daemon[1302]: [system] Activating via systemd: service name='org.freedesktop.ColorManager' unit='colord.service' requested by ':1.65' (uid=121 pid=1780 comm="/usr/lib/gnome-settings-daemon/gsd-color " label="unconfined")

/var/log/syslog.1:Mar  3 10:17:39 ubu-desk colord-sane: [bjnp] create_broadcast_socket: ERROR - bind socket to local address failed - Cannot assign requested address

When installing custom themes, you can install them for system-wide use, or specific-user-only use.

For system-wide use, you'll place theme files in /usr/share/themes.

For specific-user-only use, I recommend use use of the User Themes GNOME extension, which can be found here. For complete instructions on how to install this extension, see here. Then place custom themes into ~/.themes. Use gnome-tweaks to select themes from this folder.

Be careful installing custom themes, as they can cause many system-wide problems, even if they're installed in a specific-user-only position.

Update #1:

The Flat-Remix theme, which was installed via apt, just offered an update. The update solved the gdm3 login screen issue.