Ubuntu 18.04 / 4.15.0-46 : gdm3 : error: unexpectedly disconnected from boot status daemon

[Frank Scherie]

OS: Ubuntu 18.04 LTS x86_64
uname: Linux 4.15.0-46-generic x86_64

After performing automatic update of OS about 10 days ago (1-MAR-2019 and later) boot process shows with grub option "quiet splash" following lines

[ OK ] Started Set console scheme.
<other entries>
[ OK ] Starting User Manager for UID 121...

after few moments the graphical login screen is shown up and OS can be used without limitations.
after succesful login a message box come up that there is a problem with a system application with tion to generate a message to be sended.

syslog shows

Mar 13 14:39:16 <machine> gdm3[2095]: error: unexpectedly disconnected from boot status daemon
Mar 13 14:39:16 <machine> systemd[1]: Started Set console scheme.

So it looks like gdm3 terminated for unknown reason and restarts or reconnects

setting debug flag for Xorg inside

/etc/gdm3/custom.conf

Enable=true

generates in crash dump

/var/crash/_sbin_plymouthd.0.crash

Extraction/Debug done by

cd /var/crash
mkdir XXX
apport-unpack _sbin_plymouthd.0.crash XXX
cd XXX
gdb `cat ExecutablePath` CoreDump

giving following call stack using "bt" command

#0 0x00007f40e8813e97 in __GI_raise (sig=sig@entry=6)
    at ../sysdeps/unix/sysv/linux/raise.c:51
#1 0x00007f40e8815801 in __GI_abort () at abort.c:79
#2 0x00007f40e880539a in __assert_fail_base (fmt=0x7f40e898c7d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f40e22cc998 "has_input_source (backend, input_source)", file=file@entry=0x7f40e22cc880 "./plugin.c", line=line@entry=1253, function=function@entry=0x7f40e22cd680 "set_handler_for_input_source") at assert.c:92
#3 0x00007f40e8805412 in __GI___assert_fail (assertion=0x7f40e22cc998 "has_input_source (backend, input_source)", file=0x7f40e22cc880 "./plugin.c", line=1253, function=0x7f40e22cd680 "set_handler_for_input_source") at assert.c:101
#4 0x00007f40e22ca35d in ()
    at /usr/lib/x86_64-linux-gnu/plymouth/renderers/drm.so
#5 0x00007f40e8bcecbf in ply_keyboard_stop_watching_for_input ()
    at /lib/x86_64-linux-gnu/libply-splash-core.so.4
#6 0x00007f40e8bce21b in ply_device_manager_deactivate_keyboards ()
    at /lib/x86_64-linux-gnu/libply-splash-core.so.4
#7 0x00005639d93b6ec3 in ()
#8 0x00005639d93b0b9b in ()
#9 0x00007f40e8de3fbe in ply_event_loop_process_pending_events ()
    at /lib/x86_64-linux-gnu/libply.so.4
#10 0x00007f40e8de4480 in ply_event_loop_run ()
    at /lib/x86_64-linux-gnu/libply.so.4
---Type <return> to continue, or q <return> to quit---
#11 0x00005639d93ae514 in main ()

Please see attached crash dump file

kind regards
Frank Scherie

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: firefox 66.0.2+build1-0ubuntu0.18.04.1
ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
Uname: Linux 4.15.0-47-generic x86_64
NonfreeKernelModules: ac_kdf
AddonCompatCheckDisabled: False
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC0D0p: xxxxxxx 4706 F...m pulseaudio
 /dev/snd/controlC0: gdm 3223 F.... pulseaudio
                      xxxxxxxxxx 4706 F.... pulseaudio
BuildID: 20190327091201
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 12 17:00:46 2019
ExecutablePath: /usr/lib/firefox/firefox
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2018-12-26 (106 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
IpRoute:
 default via xxxxxxxxxxx dev wlp2s0 proto static metric 600
xxxxxxxx dev wlp2s0 scope link metric 1000
 xxxxxxxxxx dev wlp2s0 proto kernel scope link src
xxxxxxxxxx metric 600
Locales: extensions.sqlite corrupt or missing
PrefSources: prefs.js
ProcEnviron:
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=66.0.2/20190327091201 (In use)
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/05/2012
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: 6.30
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: PLCSF8
dmi.board.vendor: Intel
dmi.board.version: Type2 - Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis Manufacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvr6.30:bd12/05/2012. xxxxxxxx:pvrPSCBWE-0HY00WGR:rvnIntel:rnPLCSF8:rvrType2-BoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
dmi.product.family: Type1Family
dmi.product.name: xxxxxxx
dmi.product.version: xxxxxxxx
dmi.sys.vendor: xxxxxxx

[Frank Scherie (solarisfan)]

After upgrade to 4.15.0-48 issue is gone