Comment # 4 on bug 987487 from John Sheehy

I am having this same issue in current TW release (VERSION_ID="20190215"). This
is the first time I have encountered this issue with TW since beginning to use
it on this machine in 2012.

It's difficult to find the sddm log file, since there is a memory corruption
bub in sddm that makes sddm put it in a random directory in the user's home
directory.

Here's my output from ~/R?U/.local/share/sddm/xorg-session.log:

nohup: missing operand
Try 'nohup --help' for more information.

Which isn't very helpful.

There are no .xsession-errors files created.

Output from /var/log/Xorg.0.log:

[  2199.518] (II) AIGLX: Resuming AIGLX clients after VT switch
[  2199.518] (II) intel(0): switch to mode 1600x900@60.0 on LVDS1 using pipe 0,
position (0, 0), rotation normal, reflection none
[  2199.575] (II) event4  - Power Button: is tagged by udev as: Keyboard
[  2199.575] (II) event4  - Power Button: device is a keyboard
[  2199.578] (II) systemd-logind: got resume for 13:64
[  2199.580] (II) event0  - AT Translated Set 2 keyboard: is tagged by udev as:
Keyboard
[  2199.580] (II) event0  - AT Translated Set 2 keyboard: device is a keyboard
[  2199.582] (II) systemd-logind: got resume for 13:74
[  2199.584] (II) event10 - Integrated Camera: Integrated C: is tagged by udev
as: Keyboard
[  2199.584] (II) event10 - Integrated Camera: Integrated C: device is a
keyboard
[  2199.585] (II) systemd-logind: got resume for 13:71
[  2199.586] (II) event7  - Video Bus: is tagged by udev as: Keyboard
[  2199.586] (II) event7  - Video Bus: device is a keyboard
[  2199.597] (II) systemd-logind: got resume for 13:67
[  2199.598] (II) event3  - Sleep Button: is tagged by udev as: Keyboard
[  2199.598] (II) event3  - Sleep Button: device is a keyboard
[  2199.626] (II) systemd-logind: got resume for 13:65
[  2199.628] (II) event1  - TPPS/2 IBM TrackPoint: is tagged by udev as: Mouse
Pointingstick
[  2199.628] (II) event1  - TPPS/2 IBM TrackPoint: device is a pointer
[  2199.646] (II) systemd-logind: got resume for 13:70
[  2199.647] (II) event6  - ThinkPad Extra Buttons: is tagged by udev as:
Keyboard Switch
[  2199.647] (II) event6  - ThinkPad Extra Buttons: device is a keyboard
[  2211.386] (**) Option "fd" "29"
[  2211.387] (II) event4  - Power Button: device removed
[  2211.389] (**) Option "fd" "33"
[  2211.389] (II) event7  - Video Bus: device removed
[  2211.391] (**) Option "fd" "59"
[  2211.392] (II) event3  - Sleep Button: device removed
[  2211.392] (**) Option "fd" "28"
[  2211.392] (II) event10 - Integrated Camera: Integrated C: device removed
[  2211.394] (**) Option "fd" "32"
[  2211.394] (II) event0  - AT Translated Set 2 keyboard: device removed
[  2211.395] (**) Option "fd" "61"
[  2211.395] (II) event1  - TPPS/2 IBM TrackPoint: device removed
[  2211.395] (**) Option "fd" "62"
[  2211.395] (II) event6  - ThinkPad Extra Buttons: device removed
[  2211.396] (II) AIGLX: Suspending AIGLX clients for VT switch
[  2211.411] (II) systemd-logind: got pause for 13:68
[  2211.411] (II) systemd-logind: got pause for 226:0
[  2211.411] (II) systemd-logind: got pause for 13:64
[  2211.411] (II) systemd-logind: got pause for 13:74
[  2211.411] (II) systemd-logind: got pause for 13:71
[  2211.412] (II) systemd-logind: got pause for 13:67
[  2211.412] (II) systemd-logind: got pause for 13:65
[  2211.412] (II) systemd-logind: got pause for 13:70
[  2214.862] (II) systemd-logind: got resume for 13:68
[  2214.862] (II) systemd-logind: got resume for 226:0
[  2214.862] (II) AIGLX: Resuming AIGLX clients after VT switch
[  2214.862] (II) intel(0): switch to mode 1600x900@60.0 on LVDS1 using pipe 0,
position (0, 0), rotation normal, reflection none
[  2214.943] (II) event4  - Power Button: is tagged by udev as: Keyboard
[  2214.943] (II) event4  - Power Button: device is a keyboard
[  2214.944] (**) Option "fd" "29"
[  2214.944] (II) event4  - Power Button: device removed
[  2214.945] (II) AIGLX: Suspending AIGLX clients for VT switch
[  2214.982] (II) systemd-logind: got resume for 13:64
[  2214.982] (II) systemd-logind: got resume for 13:74
[  2214.982] (II) systemd-logind: got resume for 13:71
[  2214.982] (II) systemd-logind: got resume for 13:67
[  2214.982] (II) systemd-logind: got resume for 13:65
[  2214.994] (II) systemd-logind: got resume for 13:70
[  2214.994] (II) systemd-logind: got pause for 13:68
[  2214.994] (II) systemd-logind: got pause for 226:0
[  2214.995] (II) systemd-logind: got pause for 13:64
[  2214.995] (II) systemd-logind: got pause for 13:74
[  2214.995] (II) systemd-logind: got pause for 13:71
[  2214.995] (II) systemd-logind: got pause for 13:67
[  2214.995] (II) systemd-logind: got pause for 13:65
[  2214.995] (II) systemd-logind: got pause for 13:70
[  2217.330] (II) systemd-logind: got resume for 13:68
[  2217.330] (II) systemd-logind: got resume for 226:0
[  2217.330] (II) AIGLX: Resuming AIGLX clients after VT switch
[  2217.330] (II) intel(0): switch to mode 1600x900@60.0 on LVDS1 using pipe 0,
position (0, 0), rotation normal, reflection none
[  2217.407] (II) event4  - Power Button: is tagged by udev as: Keyboard
[  2217.407] (II) event4  - Power Button: device is a keyboard
[  2217.409] (II) systemd-logind: got resume for 13:64
[  2217.412] (II) event0  - AT Translated Set 2 keyboard: is tagged by udev as:
Keyboard
[  2217.412] (II) event0  - AT Translated Set 2 keyboard: device is a keyboard
[  2217.413] (II) systemd-logind: got resume for 13:74
[  2217.414] (II) event10 - Integrated Camera: Integrated C: is tagged by udev
as: Keyboard
[  2217.414] (II) event10 - Integrated Camera: Integrated C: device is a
keyboard
[  2217.414] (II) systemd-logind: got resume for 13:71
[  2217.415] (II) event7  - Video Bus: is tagged by udev as: Keyboard
[  2217.415] (II) event7  - Video Bus: device is a keyboard
[  2217.430] (II) systemd-logind: got resume for 13:67
[  2217.431] (II) event3  - Sleep Button: is tagged by udev as: Keyboard
[  2217.431] (II) event3  - Sleep Button: device is a keyboard
[  2217.458] (II) systemd-logind: got resume for 13:65
[  2217.458] (II) event1  - TPPS/2 IBM TrackPoint: is tagged by udev as: Mouse
Pointingstick
[  2217.458] (II) event1  - TPPS/2 IBM TrackPoint: device is a pointer
[  2217.490] (II) systemd-logind: got resume for 13:70
[  2217.491] (II) event6  - ThinkPad Extra Buttons: is tagged by udev as:
Keyboard Switch
[  2217.491] (II) event6  - ThinkPad Extra Buttons: device is a keyboard

This is mostly messages about me swiching from VT7 running sddm to VT1 where I
am running X as root via startx.

Output from journalctl at this time:

Feb 18 16:50:31 HOSTNAME sddm-greeter[15679]: Reading from
"/usr/share/xsessions/plasma5.desktop"
Feb 18 16:50:31 HOSTNAME sddm[15649]: Message received from greeter: Login
Feb 18 16:50:31 HOSTNAME sddm[15649]: Reading from
"/usr/share/xsessions/plasma5.desktop"
Feb 18 16:50:31 HOSTNAME sddm[15649]: Reading from
"/usr/share/xsessions/plasma5.desktop"
Feb 18 16:50:31 HOSTNAME sddm[15649]: Session
"/usr/share/xsessions/plasma5.desktop" selected, command: "/usr/bin/startkde"
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: [PAM] Starting...
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: [PAM] Authenticating...
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: [PAM] Preparing to converse...
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: [PAM] Conversation with 1 messages
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: [PAM] returning.
Feb 18 16:50:31 HOSTNAME sddm[15649]: Authenticated successfully
Feb 18 16:50:31 HOSTNAME sddm-greeter[15679]: Message received from daemon:
LoginSucceeded
Feb 18 16:50:31 HOSTNAME systemd[1]: Created slice User Slice of UID 1000.
Feb 18 16:50:31 HOSTNAME systemd[1]: Starting /run/user/1000 mount wrapper...
Feb 18 16:50:31 HOSTNAME systemd-logind[11320]: New session 6 of user USERNAME.
Feb 18 16:50:31 HOSTNAME systemd[1]: Started /run/user/1000 mount wrapper.
Feb 18 16:50:31 HOSTNAME systemd[1]: Starting User Manager for UID 1000...
Feb 18 16:50:31 HOSTNAME systemd[1]: Started Session 6 of user USERNAME.
Feb 18 16:50:31 HOSTNAME systemd[15756]: pam_unix(systemd-user:session):
session opened for user USERNAME by (uid=0)
Feb 18 16:50:31 HOSTNAME sddm-helper[15670]: [PAM] Closing session
Feb 18 16:50:31 HOSTNAME sddm-helper[15670]: pam_unix(sddm-greeter:session):
session closed for user sddm
Feb 18 16:50:31 HOSTNAME sddm-helper[15670]: [PAM] Ended.
Feb 18 16:50:31 HOSTNAME sddm[15649]: Auth: sddm-helper exited successfully
Feb 18 16:50:31 HOSTNAME sddm[15649]: Greeter stopped.
Feb 18 16:50:31 HOSTNAME systemd-logind[11320]: Session 5 logged out. Waiting
for processes to exit.
Feb 18 16:50:31 HOSTNAME systemd-logind[11320]: Removed session 5.
Feb 18 16:50:31 HOSTNAME systemd[1]: user-runtime-dir@477.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:31 HOSTNAME systemd[1]: Stopping User Manager for UID 477...
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped target Default.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopping D-Bus User Message Bus...
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped D-Bus User Message Bus.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped target Basic System.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped target Sockets.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped target Paths.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Stopped target Timers.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Closed D-Bus User Message Bus Socket.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Reached target Shutdown.
Feb 18 16:50:31 HOSTNAME systemd[15673]: Starting Exit the Session...
Feb 18 16:50:31 HOSTNAME systemd[15674]: pam_unix(systemd-user:session):
session closed for user sddm
Feb 18 16:50:31 HOSTNAME systemd[1]: user-runtime-dir@477.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:31 HOSTNAME systemd[1]: Stopped User Manager for UID 477.
Feb 18 16:50:31 HOSTNAME systemd[1]: user-runtime-dir@477.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:31 HOSTNAME systemd[1]: user-477.slice: Unit not needed anymore.
Stopping.
Feb 18 16:50:31 HOSTNAME systemd[1]: Stopping /run/user/477 mount wrapper...
Feb 18 16:50:31 HOSTNAME systemd[1]: Stopped /run/user/477 mount wrapper.
Feb 18 16:50:31 HOSTNAME systemd[1]: user-477.slice: Unit not needed anymore.
Stopping.
Feb 18 16:50:31 HOSTNAME systemd[1]: Removed slice User Slice of UID 477.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Reached target Paths.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Starting D-Bus User Message Bus
Socket.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Reached target Timers.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Listening on D-Bus User Message Bus
Socket.
eb 18 16:50:31 HOSTNAME systemd[15756]: Reached target Sockets.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Reached target Basic System.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Reached target Default.
Feb 18 16:50:31 HOSTNAME systemd[15756]: Startup finished in 69ms.
Feb 18 16:50:31 HOSTNAME systemd[1]: Started User Manager for UID 1000.
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: pam_unix(sddm:session): session
opened for user USERNAME by (uid=0)
Feb 18 16:50:31 HOSTNAME sddm-helper[15754]: Starting: "/etc/X11/xdm/Xsession
\"/usr/bin/startkde\""
Feb 18 16:50:31 HOSTNAME sddm-helper[15764]: Adding cookie to
"/home/USERNAME/.Xauthority"
Feb 18 16:50:31 HOSTNAME sddm[15649]: Session started
Feb 18 16:50:31 HOSTNAME systemd[15756]: Started D-Bus User Message Bus.
Feb 18 16:50:32 HOSTNAME sddm-helper[15754]: [PAM] Closing session
Feb 18 16:50:32 HOSTNAME sddm-helper[15754]: pam_unix(sddm:session): session
closed for user USERNAME
Feb 18 16:50:32 HOSTNAME sddm-helper[15754]: [PAM] Ended.
Feb 18 16:50:32 HOSTNAME sddm[15649]: Auth: sddm-helper exited with 125
Feb 18 16:50:32 HOSTNAME sddm[15649]: Socket server stopping...
Feb 18 16:50:32 HOSTNAME sddm[15649]: Socket server stopped.
Feb 18 16:50:32 HOSTNAME sddm[15649]: Display server stopping...
Feb 18 16:50:32 HOSTNAME systemd-logind[11320]: Session 6 logged out. Waiting
for processes to exit.
Feb 18 16:50:32 HOSTNAME systemd-logind[11320]: Removed session 6.
Feb 18 16:50:32 HOSTNAME systemd[1]: user-runtime-dir@1000.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:32 HOSTNAME systemd[1]: Stopping User Manager for UID 1000...
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopping D-Bus User Message Bus...
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped target Default.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped D-Bus User Message Bus.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped target Basic System.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped target Timers.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped target Paths.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Stopped target Sockets.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Closed D-Bus User Message Bus Socket.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Reached target Shutdown.
Feb 18 16:50:32 HOSTNAME systemd[15756]: Starting Exit the Session...
Feb 18 16:50:32 HOSTNAME systemd[15757]: pam_unix(systemd-user:session):
session closed for user USERNAME
Feb 18 16:50:32 HOSTNAME systemd[1]: user-runtime-dir@1000.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:32 HOSTNAME systemd[1]: Stopped User Manager for UID 1000.
Feb 18 16:50:32 HOSTNAME systemd[1]: user-runtime-dir@1000.service: Unit not
needed anymore. Stopping.
Feb 18 16:50:32 HOSTNAME systemd[1]: user-1000.slice: Unit not needed anymore.
Stopping.
Feb 18 16:50:32 HOSTNAME systemd[1]: Stopping /run/user/1000 mount wrapper...
Feb 18 16:50:32 HOSTNAME systemd[1]: Stopped /run/user/1000 mount wrapper.
Feb 18 16:50:32 HOSTNAME systemd[1]: user-1000.slice: Unit not needed anymore.
Stopping.
Feb 18 16:50:32 HOSTNAME systemd[1]: Removed slice User Slice of UID 1000.
Feb 18 16:50:32 HOSTNAME sddm[15649]: Display server stopped.
Feb 18 16:50:32 HOSTNAME sddm[15649]: Running display stop script 
"/usr/share/sddm/scripts/Xstop"
Feb 18 16:50:32 HOSTNAME sddm[15649]: Removing display ":1" ...
Feb 18 16:50:32 HOSTNAME sddm[15649]: Adding new display on vt 7 ...
Feb 18 16:50:32 HOSTNAME sddm[15649]: Loading theme configuration from ""
Feb 18 16:50:32 HOSTNAME sddm[15649]: Display server starting...
Feb 18 16:50:32 HOSTNAME sddm[15649]: Running: /usr/bin/X -nolisten tcp -auth
/run/sddm/{442a955a-13ea-4d9b-bf26-54f758fc6045} -background none -noreset
-displayfd 18 -seat seat0 vt7
Feb 18 16:50:32 HOSTNAME acpid[11267]: client 15651[0:0] has disconnected
Feb 18 16:50:32 HOSTNAME acpid[11267]: client connected from 15838[0:0]
Feb 18 16:50:32 HOSTNAME acpid[11267]: 1 client rule loaded
Feb 18 16:50:34 HOSTNAME sddm[15649]: Failed to read display number from pipe
Feb 18 16:50:34 HOSTNAME sddm[15649]: Display server failed to start. Exiting
Feb 18 16:50:34 HOSTNAME systemd[1]: Created slice
system-systemd\x2dcoredump.slice.
Feb 18 16:50:34 HOSTNAME systemd[1]: Started Process Core Dump (PID 15842/UID
0).
Feb 18 16:50:34 HOSTNAME acpid[11267]: client 15838[0:0] has disconnected
Feb 18 16:50:34 HOSTNAME systemd[1]: display-manager.service: Main process
exited, code=dumped, status=6/ABRT
Feb 18 16:50:34 HOSTNAME systemd[1]: display-manager.service: Failed with
result 'core-dump'.
Feb 18 16:50:34 HOSTNAME systemd[1]: display-manager.service: Triggering
OnFailure= dependencies.
Feb 18 16:50:34 HOSTNAME systemd[1]: display-manager.service: Failed to enqueue
OnFailure= job, ignoring: Unit plymouth-quit.service not found.
Feb 18 16:50:34 HOSTNAME systemd-coredump[15844]: Process 15649 (sddm) of user
0 dumped core.