Public bug reported:
This concerns gnome-session-bin 3.36.0-2ubuntu1 in Ubuntu focal.
When I log into a Xubuntu desktop via xrdp, an error occurs, and the
session terminates before the desktop is even drawn on the screen.
I looked in syslog, and saw this:
Apr 9 12:12:23 test-ubuntu64 systemd[1760]: Reached target Tasks to be run
before GNOME Session starts.
Apr 9 12:12:23 test-ubuntu64 systemd[1760]: Starting GNOME Session Manager
(session: gnome)...
Apr 9 12:12:23 test-ubuntu64 gnome-session[1900]:
gnome-session-binary[1900]: CRITICAL: We failed, but the fail whale is dead.
Sorry....
Apr 9 12:12:23 test-ubuntu64 gnome-session-binary[1900]: CRITICAL: We
failed, but the fail whale is dead. Sorry....
Apr 9 12:12:23 test-ubuntu64 systemd[1760]:
gnome-session-manager@gnome.service: Main process exited, code=exited,
status=1/FAILURE
I edited /usr/lib/systemd/user/gnome-session-manager@.service to add the
--debug option to the gnome-session-binary invocation, and tried again. Now I
saw this:
Apr 9 12:23:52 test-ubuntu64 systemd[2686]: Reached target Tasks to be run
before GNOME Session starts.
Apr 9 12:23:52 test-ubuntu64 systemd[2686]: Starting GNOME Session Manager
(session: gnome)...
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Enabling debugging
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
Enabling debugging
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): hardware acceleration already done if
needed
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
hardware acceleration already done if needed
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Finding a graphical session for user 1000
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Finding
a graphical session for user 1000
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Considering session 'c4'
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
Considering session 'c4'
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Found session ID: c4
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Found
session ID: c4
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Using systemd for session tracking
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Using
systemd for session tracking
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: GLib-GIO-DEBUG(+): _g_io_module_get_default: Found
default implementation dconf (DConfSettingsBackend) for
\u2018gsettings-backend\u2019
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
GLib-GIO-DEBUG(+): _g_io_module_get_default: Found default implementation dconf
(DConfSettingsBackend) for \u2018gsettings-backend\u2019
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): GsmManager: setting client store
0x559bf9e91e40
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
GsmManager: setting client store 0x559bf9e91e40
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): GsmXsmpServer:
SESSION_MANAGER=local/test-ubuntu64:@/tmp/.ICE-unix/2818,unix/test-ubuntu64:/tmp/.ICE-unix/2818
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
GsmXsmpServer:
SESSION_MANAGER=local/test-ubuntu64:@/tmp/.ICE-unix/2818,unix/test-ubuntu64:/tmp/.ICE-unix/2818#012
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): emitting SessionIsActive
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+):
emitting SessionIsActive
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Getting session 'gnome'
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Getting session 'gnome'
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/home/skunk/.config/gnome-session/sessions/gnome.session is a valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /home/skunk/.config/gnome-session/sessions/gnome.session is a
valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/home/skunk/.config/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/home/skunk/.config/gnome-session/sessions/gnome.session':
non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/etc/xdg/gnome-session/sessions/gnome.session is a valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /etc/xdg/gnome-session/sessions/gnome.session is a valid session
file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/etc/xdg/gnome-session/sessions/gnome.session': non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/etc/xdg/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/usr/share/gnome/gnome-session/sessions/gnome.session is a valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /usr/share/gnome/gnome-session/sessions/gnome.session is a valid
session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/usr/share/gnome/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/usr/share/gnome/gnome-session/sessions/gnome.session':
non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/usr/local/share/gnome-session/sessions/gnome.session is a valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /usr/local/share/gnome-session/sessions/gnome.session is a valid
session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/usr/local/share/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/usr/share/gnome-session/sessions/gnome.session is a valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/usr/local/share/gnome-session/sessions/gnome.session':
non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /usr/share/gnome-session/sessions/gnome.session is a valid
session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/usr/share/gnome-session/sessions/gnome.session': non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): fill: *** Looking if
/var/lib/snapd/desktop/gnome-session/sessions/gnome.session is a valid session
file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: DEBUG(+): Cannot use session
'/var/lib/snapd/desktop/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]:
gnome-session-binary[2818]: CRITICAL: We failed, but the fail whale is dead.
Sorry....
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/usr/share/gnome-session/sessions/gnome.session': non-existing or
invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): fill:
*** Looking if /var/lib/snapd/desktop/gnome-session/sessions/gnome.session is a
valid session file
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: DEBUG(+): Cannot
use session '/var/lib/snapd/desktop/gnome-session/sessions/gnome.session':
non-existing or invalid file.
Apr 9 12:23:52 test-ubuntu64 gnome-session-binary[2818]: CRITICAL: We
failed, but the fail whale is dead. Sorry....
Apr 9 12:23:52 test-ubuntu64 systemd[2686]:
gnome-session-manager@gnome.service: Main process exited, code=exited,
status=1/FAILURE
It appears that gnome-session-binary is failing because it cannot find a valid
session file. I copied a gnome.session file into
/home/skunk/.config/gnome-session/sessions/, and tried again. Lo and behold,
the login was successful (although the user was now running GNOME instead of
Xubuntu/Xfce).
Given that the gnome-session-bin package functions incorrectly if it
cannot find a gnome.session file (e.g. as provided by the gnome-session
package), it should not be installable without one. A hard dependency on
gnome-session seems appropriate.
** Affects: gnome-session (Ubuntu)
Importance: Undecided
Status: New
** Tags: focal
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https://bugs.launchpad.net/bugs/1871882
Title:
gnome-session-bin package cannot function without gnome-session
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