You are not logged in.
I also got this weird issue. Trying to log in and sddm restarts. I'm using SDDM/KDE5 and also the breeze theme. I got an Intel(R) Core(TM) i5-4200H CPU @ 2.80GHz/NVIDIA Corporation GM107M [GeForce GTX 860M] optimus laptop setup. The funny thing for me is, that on some reboots login works and on some it does not work.
The last 200 lines of journalctl when sddm restarts:
Feb 04 07:58:03 burner-red systemd[3660]: Received SIGRTMIN+24 from PID 3690 (kill).
Feb 04 07:58:03 burner-red systemd[3662]: pam_unix(systemd-user:session): session closed for user nero
Feb 04 07:58:03 burner-red systemd[1]: Stopped User Manager for UID 1000.
Feb 04 07:58:03 burner-red systemd[1]: Removed slice User Slice of nero.
Feb 04 07:58:04 burner-red sddm[480]: Display server stopped.
Feb 04 07:58:04 burner-red sddm[480]: Running display stop script "/usr/share/sddm/scripts/Xstop"
Feb 04 07:58:04 burner-red sddm[480]: Socket server stopping...
Feb 04 07:58:04 burner-red sddm[480]: Socket server stopped.
Feb 04 07:58:04 burner-red sddm[480]: Removing display ":0" ...
Feb 04 07:58:04 burner-red sddm[480]: Adding new display on vt 1 ...
Feb 04 07:58:04 burner-red sddm[480]: Display server starting...
Feb 04 07:58:04 burner-red sddm[480]: Running: /usr/bin/X -nolisten tcp -auth /var/run/sddm/{cb7da39b-a183-472f-8b42-75ace05f07a9} -background none -noreset -displayfd 17 vt1
Feb 04 07:58:04 burner-red sddm[480]: Running display setup script "/usr/share/sddm/scripts/Xsetup"
Feb 04 07:58:04 burner-red sddm[480]: Display server started.
Feb 04 07:58:04 burner-red sddm[480]: Socket server starting...
Feb 04 07:58:04 burner-red sddm[480]: Socket server started.
Feb 04 07:58:04 burner-red sddm[480]: Greeter starting...
Feb 04 07:58:04 burner-red sddm[480]: Adding cookie to "/var/run/sddm/{cb7da39b-a183-472f-8b42-75ace05f07a9}"
Feb 04 07:58:04 burner-red sddm-helper[3702]: [PAM] Starting...
Feb 04 07:58:04 burner-red sddm-helper[3702]: [PAM] Authenticating...
Feb 04 07:58:04 burner-red sddm-helper[3702]: [PAM] returning.
Feb 04 07:58:04 burner-red sddm-helper[3702]: pam_unix(sddm-greeter:session): session opened for user sddm by (uid=0)
Feb 04 07:58:04 burner-red systemd[1]: Created slice User Slice of sddm.
Feb 04 07:58:04 burner-red systemd[1]: Starting User Manager for UID 618...
Feb 04 07:58:04 burner-red systemd-logind[427]: New session c5 of user sddm.
Feb 04 07:58:04 burner-red systemd[1]: Started Session c5 of user sddm.
Feb 04 07:58:04 burner-red systemd[3704]: pam_unix(systemd-user:session): session opened for user sddm by (uid=0)
Feb 04 07:58:04 burner-red systemd[3704]: Starting D-Bus User Message Bus Socket.
Feb 04 07:58:04 burner-red systemd[3704]: Reached target Paths.
Feb 04 07:58:04 burner-red systemd[3704]: Listening on Sound System.
Feb 04 07:58:04 burner-red systemd[3704]: Reached target Timers.
Feb 04 07:58:04 burner-red systemd[3704]: Listening on D-Bus User Message Bus Socket.
Feb 04 07:58:04 burner-red systemd[3704]: Reached target Sockets.
Feb 04 07:58:04 burner-red systemd[3704]: Reached target Basic System.
Feb 04 07:58:04 burner-red systemd[3704]: Reached target Default.
Feb 04 07:58:04 burner-red systemd[3704]: Startup finished in 11ms.
Feb 04 07:58:04 burner-red systemd[1]: Started User Manager for UID 618.
Feb 04 07:58:04 burner-red sddm[480]: Greeter session started successfully
Feb 04 07:58:04 burner-red sddm-greeter[3713]: Reading from "/usr/share/xsessions/plasma-mediacenter.desktop"
Feb 04 07:58:04 burner-red sddm-greeter[3713]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 07:58:04 burner-red sddm-greeter[3713]: Connected to the daemon.
Feb 04 07:58:04 burner-red sddm[480]: Message received from greeter: Connect
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff66a40620), parent's thread is QThread(0xb17830), current thread is QThread(0xe48110)
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff66a40620), parent's thread is QThread(0xb17830), current thread is QThread(0xe48110)
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff66a40620), parent's thread is QThread(0xb17830), current thread is QThread(0xe48110)
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff66a40620), parent's thread is QThread(0xb17830), current thread is QThread(0xe48110)
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 07:58:04 burner-red systemd[3704]: Started D-Bus User Message Bus.
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff66a40620), parent's thread is QThread(0xb17830), current thread is QThread(0xe48110)
Feb 04 07:58:04 burner-red sddm-greeter[3713]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 07:58:05 burner-red sddm-greeter[3713]: Adding view for "eDP1" QRect(0,0 1920x1080)
Feb 04 07:58:05 burner-red sddm-greeter[3713]: Message received from daemon: Capabilities
Feb 04 07:58:05 burner-red sddm-greeter[3713]: Message received from daemon: HostName
Feb 04 07:58:14 burner-red sddm-greeter[3713]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 07:58:14 burner-red sddm[480]: Message received from greeter: Login
Feb 04 07:58:14 burner-red sddm[480]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 07:58:14 burner-red sddm[480]: Session "/usr/share/xsessions/plasma.desktop" selected, command: "/usr/bin/startkde"
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] Starting...
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] Authenticating...
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] Preparing to converse...
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] Conversation with 1 messages
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] returning.
Feb 04 07:58:14 burner-red sddm[480]: Authenticated successfully
Feb 04 07:58:14 burner-red sddm-greeter[3713]: Message received from daemon: LoginSucceeded
Feb 04 07:58:14 burner-red sddm-helper[3718]: pam_unix(sddm:session): session opened for user nero by (uid=0)
Feb 04 07:58:14 burner-red systemd[1]: Created slice User Slice of nero.
Feb 04 07:58:14 burner-red systemd[1]: Starting User Manager for UID 1000...
Feb 04 07:58:14 burner-red sddm-helper[3702]: [PAM] Ended.
Feb 04 07:58:14 burner-red sddm[480]: Auth: sddm-helper exited successfully
Feb 04 07:58:14 burner-red sddm[480]: Greeter stopped.
Feb 04 07:58:14 burner-red systemd-logind[427]: New session c6 of user nero.
Feb 04 07:58:14 burner-red systemd[3719]: pam_unix(systemd-user:session): session opened for user nero by (uid=0)
Feb 04 07:58:14 burner-red systemd[1]: Started Session c6 of user nero.
Feb 04 07:58:14 burner-red systemd-logind[427]: Removed session c5.
Feb 04 07:58:14 burner-red systemd[1]: Stopping User Manager for UID 618...
Feb 04 07:58:14 burner-red systemd[3704]: Stopping D-Bus User Message Bus...
Feb 04 07:58:14 burner-red systemd[3704]: Stopped target Default.
Feb 04 07:58:14 burner-red systemd[3704]: Stopped D-Bus User Message Bus.
Feb 04 07:58:14 burner-red systemd[3704]: Stopped target Basic System.
Feb 04 07:58:14 burner-red systemd[3704]: Stopped target Sockets.
Feb 04 07:58:14 burner-red systemd[3704]: Closed Sound System.
Feb 04 07:58:14 burner-red systemd[3704]: Stopped target Paths.
Feb 04 07:58:14 burner-red systemd[3704]: Stopped target Timers.
Feb 04 07:58:14 burner-red systemd[3704]: Closed D-Bus User Message Bus Socket.
Feb 04 07:58:14 burner-red systemd[3704]: Reached target Shutdown.
Feb 04 07:58:14 burner-red systemd[3704]: Starting Exit the Session...
Feb 04 07:58:14 burner-red systemd[3704]: Received SIGRTMIN+24 from PID 3727 (kill).
Feb 04 07:58:14 burner-red systemd[3719]: Starting D-Bus User Message Bus Socket.
Feb 04 07:58:14 burner-red systemd[3719]: Listening on Sound System.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Timers.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Paths.
Feb 04 07:58:14 burner-red systemd[3707]: pam_unix(systemd-user:session): session closed for user sddm
Feb 04 07:58:14 burner-red systemd[1]: Stopped User Manager for UID 618.
Feb 04 07:58:14 burner-red systemd[3722]: pam_unix(systemd-user:session): session closed for user nero
Feb 04 07:58:14 burner-red systemd[1]: Removed slice User Slice of sddm.
Feb 04 07:58:14 burner-red systemd[3719]: Listening on D-Bus User Message Bus Socket.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Sockets.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Basic System.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Default.
Feb 04 07:58:14 burner-red systemd[3719]: Startup finished in 27ms.
Feb 04 07:58:14 burner-red systemd[1]: Started User Manager for UID 1000.
Feb 04 07:58:14 burner-red sddm-helper[3718]: Starting: "/usr/share/sddm/scripts/Xsession" "/usr/bin/startkde"
Feb 04 07:58:14 burner-red sddm-helper[3734]: Adding cookie to "/home/nero/.Xauthority"
Feb 04 07:58:14 burner-red sddm[480]: Session started
Feb 04 07:58:14 burner-red systemd[3719]: Started D-Bus User Message Bus.
Feb 04 07:58:14 burner-red sddm-helper[3718]: [PAM] Ended.
Feb 04 07:58:14 burner-red sddm[480]: Auth: sddm-helper exited with 1
Feb 04 07:58:14 burner-red systemd-logind[427]: Removed session c6.
Feb 04 07:58:14 burner-red systemd[1]: Stopping User Manager for UID 1000...
Feb 04 07:58:14 burner-red systemd[3719]: Stopping D-Bus User Message Bus...
Feb 04 07:58:14 burner-red systemd[3719]: Stopped target Default.
Feb 04 07:58:14 burner-red systemd[3719]: Stopped D-Bus User Message Bus.
Feb 04 07:58:14 burner-red systemd[3719]: Stopped target Basic System.
Feb 04 07:58:14 burner-red systemd[3719]: Stopped target Sockets.
Feb 04 07:58:14 burner-red systemd[3719]: Closed Sound System.
Feb 04 07:58:14 burner-red systemd[3719]: Stopped target Timers.
Feb 04 07:58:14 burner-red systemd[3719]: Stopped target Paths.
Feb 04 07:58:14 burner-red systemd[3719]: Closed D-Bus User Message Bus Socket.
Feb 04 07:58:14 burner-red systemd[3719]: Reached target Shutdown.
Feb 04 07:58:14 burner-red systemd[3719]: Starting Exit the Session...
Feb 04 07:58:14 burner-red systemd[3719]: Received SIGRTMIN+24 from PID 3750 (kill).
Feb 04 07:58:14 burner-red systemd[1]: Stopped User Manager for UID 1000.
Feb 04 07:58:14 burner-red systemd[1]: Removed slice User Slice of nero.
Feb 04 07:58:14 burner-red sddm[480]: Display server stopped.
Feb 04 07:58:14 burner-red sddm[480]: Running display stop script "/usr/share/sddm/scripts/Xstop"
Feb 04 07:58:14 burner-red sddm[480]: Socket server stopping...
Feb 04 07:58:14 burner-red sddm[480]: Socket server stopped.
Feb 04 07:58:14 burner-red sddm[480]: Removing display ":0" ...
Feb 04 07:58:14 burner-red sddm[480]: Adding new display on vt 1 ...
Feb 04 07:58:14 burner-red sddm[480]: Display server starting...
Feb 04 07:58:14 burner-red sddm[480]: Running: /usr/bin/X -nolisten tcp -auth /var/run/sddm/{0bad9eb4-ee52-422a-9675-3f4c02893457} -background none -noreset -displayfd 18 vt1
Feb 04 07:58:14 burner-red sddm[480]: Running display setup script "/usr/share/sddm/scripts/Xsetup"
Feb 04 07:58:14 burner-red sddm[480]: Display server started.
Feb 04 07:58:14 burner-red sddm[480]: Socket server starting...
Feb 04 07:58:14 burner-red sddm[480]: Socket server started.
Feb 04 07:58:14 burner-red sddm[480]: Greeter starting...
Feb 04 07:58:14 burner-red sddm[480]: Adding cookie to "/var/run/sddm/{0bad9eb4-ee52-422a-9675-3f4c02893457}"
Feb 04 07:58:14 burner-red sddm-helper[3762]: [PAM] Starting...
Feb 04 07:58:14 burner-red sddm-helper[3762]: [PAM] Authenticating...
Feb 04 07:58:14 burner-red sddm-helper[3762]: [PAM] returning.
Feb 04 07:58:14 burner-red sddm-helper[3762]: pam_unix(sddm-greeter:session): session opened for user sddm by (uid=0)
Feb 04 07:58:14 burner-red systemd[1]: Created slice User Slice of sddm.
Feb 04 07:58:15 burner-red systemd[1]: Starting User Manager for UID 618...
Feb 04 07:58:15 burner-red systemd-logind[427]: New session c7 of user sddm.
Feb 04 07:58:15 burner-red systemd[1]: Started Session c7 of user sddm.
Feb 04 07:58:15 burner-red systemd[3764]: pam_unix(systemd-user:session): session opened for user sddm by (uid=0)
Feb 04 07:58:15 burner-red systemd[3764]: Starting D-Bus User Message Bus Socket.
Feb 04 07:58:15 burner-red systemd[3764]: Reached target Paths.
Feb 04 07:58:15 burner-red systemd[3764]: Reached target Timers.
Feb 04 07:58:15 burner-red systemd[3764]: Listening on Sound System.
Feb 04 07:58:15 burner-red systemd[3764]: Listening on D-Bus User Message Bus Socket.
Feb 04 07:58:15 burner-red systemd[3764]: Reached target Sockets.
Feb 04 07:58:15 burner-red systemd[3764]: Reached target Basic System.
Feb 04 07:58:15 burner-red systemd[3764]: Reached target Default.
Feb 04 07:58:15 burner-red systemd[3764]: Startup finished in 11ms.
Feb 04 07:58:15 burner-red systemd[1]: Started User Manager for UID 618.
Feb 04 07:58:15 burner-red sddm[480]: Greeter session started successfully
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Reading from "/usr/share/xsessions/plasma-mediacenter.desktop"
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Connected to the daemon.
Feb 04 07:58:15 burner-red sddm[480]: Message received from greeter: Connect
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7ffdf5315800), parent's thread is QThread(0x820830), current thread is QThread(0xb51090)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7ffdf5315800), parent's thread is QThread(0x820830), current thread is QThread(0xb51090)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7ffdf5315800), parent's thread is QThread(0x820830), current thread is QThread(0xb51090)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7ffdf5315800), parent's thread is QThread(0x820830), current thread is QThread(0xb51090)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 07:58:15 burner-red systemd[3764]: Started D-Bus User Message Bus.
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7ffdf5315800), parent's thread is QThread(0x820830), current thread is QThread(0xb51090)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Adding view for "eDP1" QRect(0,0 1920x1080)
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Message received from daemon: Capabilities
Feb 04 07:58:15 burner-red sddm-greeter[3773]: Message received from daemon: HostName
Feb 04 07:58:16 burner-red systemd[1]: Started Getty on tty2.
Feb 04 07:58:20 burner-red login[3778]: pam_unix(login:session): session opened for user nero by LOGIN(uid=0)
Feb 04 07:58:20 burner-red systemd[1]: Created slice User Slice of nero.
Feb 04 07:58:20 burner-red systemd[1]: Starting User Manager for UID 1000...
Feb 04 07:58:20 burner-red systemd-logind[427]: New session c8 of user nero.
Feb 04 07:58:20 burner-red systemd[3782]: pam_unix(systemd-user:session): session opened for user nero by (uid=0)
Feb 04 07:58:20 burner-red systemd[1]: Started Session c8 of user nero.
Feb 04 07:58:20 burner-red systemd[3782]: Starting D-Bus User Message Bus Socket.
Feb 04 07:58:20 burner-red systemd[3782]: Reached target Timers.
Feb 04 07:58:20 burner-red systemd[3782]: Reached target Paths.
Feb 04 07:58:20 burner-red systemd[3782]: Listening on Sound System.
Feb 04 07:58:20 burner-red systemd[3782]: Listening on D-Bus User Message Bus Socket.
Feb 04 07:58:20 burner-red systemd[3782]: Reached target Sockets.
Feb 04 07:58:20 burner-red systemd[3782]: Reached target Basic System.
Feb 04 07:58:20 burner-red systemd[3782]: Reached target Default.
Feb 04 07:58:20 burner-red systemd[3782]: Startup finished in 18ms.
Feb 04 07:58:20 burner-red systemd[1]: Started User Manager for UID 1000.
Feb 04 07:58:20 burner-red login[3778]: LOGIN ON tty2 BY nero
And after a reboot I can successfully log in
Feb 04 08:04:01 burner-red sddm-greeter[564]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 08:04:01 burner-red sddm[461]: Message received from greeter: Login
Feb 04 08:04:01 burner-red sddm[461]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 08:04:01 burner-red sddm[461]: Session "/usr/share/xsessions/plasma.desktop" selected, command: "/usr/bin/startkde"
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Starting...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Authenticating...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Preparing to converse...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Conversation with 1 messages
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] returning.
Feb 04 08:04:01 burner-red sddm[461]: Authenticated successfully
Feb 04 08:04:01 burner-red sddm-greeter[564]: Message received from daemon: LoginSucceeded
Feb 04 08:04:01 burner-red sddm-helper[601]: pam_unix(sddm:session): session opened for user nero by (uid=0)
Feb 04 08:04:01 burner-red systemd[1]: Created slice User Slice of nero.
<STUFF FROM THE NETWORK-MANAGER>
Feb 04 08:04:01 burner-red kernel: IPv6: ADDRCONF(NETDEV_UP): wlp8s0: link is not ready
Feb 04 08:04:01 burner-red systemd[1]: Starting User Manager for UID 1000...
Feb 04 08:04:01 burner-red systemd[1]: Started Session c2 of user nero.
Feb 04 08:04:01 burner-red systemd-logind[432]: New session c2 of user nero.
Feb 04 08:04:01 burner-red systemd[602]: pam_unix(systemd-user:session): session opened for user nero by (uid=0)
Feb 04 08:04:01 burner-red systemd[602]: Listening on Sound System.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Paths.
Feb 04 08:04:01 burner-red systemd[602]: Starting D-Bus User Message Bus Socket.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Timers.
Feb 04 08:04:01 burner-red systemd[602]: Listening on D-Bus User Message Bus Socket.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Sockets.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Basic System.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Default.
Feb 04 08:04:01 burner-red systemd[602]: Startup finished in 39ms.
Feb 04 08:04:01 burner-red systemd[1]: Started User Manager for UID 1000.
Feb 04 08:04:01 burner-red sddm-helper[601]: Starting: "/usr/share/sddm/scripts/Xsession" "/usr/bin/startkde"
Feb 04 08:04:01 burner-red sddm-helper[610]: Adding cookie to "/home/nero/.Xauthority"
Feb 04 08:04:02 burner-red sddm-helper[547]: [PAM] Ended.
Feb 04 08:04:03 burner-red systemd[559]: pam_unix(systemd-user:session): session closed for user sddm
Feb 04 08:04:02 burner-red sddm[461]: Auth: sddm-helper exited successfully
Feb 04 08:04:02 burner-red sddm[461]: Greeter stopped.
Feb 04 08:04:02 burner-red systemd-logind[432]: Removed session c1.
Feb 04 08:03:51 burner-red sddm-greeter[564]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff105e87c0), parent's thread is QThread(0x22e2830), cur
Feb 04 08:03:51 burner-red sddm-greeter[564]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff105e87c0), parent's thread is QThread(0x22e2830), cur
Feb 04 08:03:51 burner-red sddm-greeter[564]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 08:03:51 burner-red systemd[556]: Started D-Bus User Message Bus.
Feb 04 08:03:53 burner-red sddm-greeter[564]: QObject: Cannot create children for a parent that is in a different thread.
(Parent is SDDM::GreeterApp(0x7fff105e87c0), parent's thread is QThread(0x22e2830), cur
Feb 04 08:03:53 burner-red sddm-greeter[564]: QObject::installEventFilter(): Cannot filter events for objects in a different thread.
Feb 04 08:03:54 burner-red dbus[435]: [system] Activating via systemd: service name='org.freedesktop.UDisks2' unit='udisks2.service'
Feb 04 08:03:54 burner-red systemd[1]: Starting Disk Manager...
Feb 04 08:03:54 burner-red udisksd[570]: udisks daemon version 2.1.6 starting
Feb 04 08:03:54 burner-red dbus[435]: [system] Successfully activated service 'org.freedesktop.UDisks2'
Feb 04 08:03:54 burner-red systemd[1]: Started Disk Manager.
Feb 04 08:03:54 burner-red udisksd[570]: Acquired the name org.freedesktop.UDisks2 on the system message bus
Feb 04 08:03:54 burner-red dbus[435]: [system] Activating via systemd: service name='org.freedesktop.UPower' unit='upower.service'
Feb 04 08:03:54 burner-red systemd[1]: Starting Daemon for power management...
Feb 04 08:03:54 burner-red dbus[435]: [system] Successfully activated service 'org.freedesktop.UPower'
Feb 04 08:03:54 burner-red systemd[1]: Started Daemon for power management.
Feb 04 08:03:55 burner-red sddm-greeter[564]: Adding view for "eDP1" QRect(0,0 1920x1080)
Feb 04 08:03:55 burner-red sddm-greeter[564]: QDBusConnection: name 'org.freedesktop.UDisks2' had owner '' but we thought it was ':1.
Feb 04 08:03:55 burner-red sddm-greeter[564]: Message received from daemon: Capabilities
Feb 04 08:03:55 burner-red sddm-greeter[564]: Message received from daemon: HostName
Feb 04 08:04:01 burner-red sddm-greeter[564]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 08:04:01 burner-red sddm[461]: Message received from greeter: Login
Feb 04 08:04:01 burner-red sddm[461]: Reading from "/usr/share/xsessions/plasma.desktop"
Feb 04 08:04:01 burner-red sddm[461]: Session "/usr/share/xsessions/plasma.desktop" selected, command: "/usr/bin/startkde"
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Starting...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Authenticating...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Preparing to converse...
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] Conversation with 1 messages
Feb 04 08:04:01 burner-red sddm-helper[601]: [PAM] returning.
Feb 04 08:04:01 burner-red sddm[461]: Authenticated successfully
Feb 04 08:04:01 burner-red sddm-greeter[564]: Message received from daemon: LoginSucceeded
Feb 04 08:04:01 burner-red sddm-helper[601]: pam_unix(sddm:session): session opened for user nero by (uid=0)
Feb 04 08:04:01 burner-red systemd[1]: Created slice User Slice of nero.
<STUFF FROM THE NETWORK-MANAGER>
Feb 04 08:04:01 burner-red systemd[1]: Starting User Manager for UID 1000...
Feb 04 08:04:01 burner-red systemd[1]: Started Session c2 of user nero.
Feb 04 08:04:01 burner-red systemd-logind[432]: New session c2 of user nero.
Feb 04 08:04:01 burner-red systemd[602]: pam_unix(systemd-user:session): session opened for user nero by (uid=0)
Feb 04 08:04:01 burner-red systemd[602]: Listening on Sound System.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Paths.
Feb 04 08:04:01 burner-red systemd[602]: Starting D-Bus User Message Bus Socket.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Timers.
Feb 04 08:04:01 burner-red systemd[602]: Listening on D-Bus User Message Bus Socket.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Sockets.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Basic System.
Feb 04 08:04:01 burner-red systemd[602]: Reached target Default.
Feb 04 08:04:01 burner-red systemd[602]: Startup finished in 39ms.
Feb 04 08:04:01 burner-red systemd[1]: Started User Manager for UID 1000.
Feb 04 08:04:01 burner-red sddm-helper[601]: Starting: "/usr/share/sddm/scripts/Xsession" "/usr/bin/startkde"
Feb 04 08:04:01 burner-red sddm-helper[610]: Adding cookie to "/home/nero/.Xauthority"
Feb 04 08:04:02 burner-red sddm-helper[547]: [PAM] Ended.
Feb 04 08:04:03 burner-red systemd[559]: pam_unix(systemd-user:session): session closed for user sddm
Feb 04 08:04:02 burner-red sddm[461]: Auth: sddm-helper exited successfully
Feb 04 08:04:02 burner-red sddm[461]: Greeter stopped.
Feb 04 08:04:02 burner-red systemd-logind[432]: Removed session c1.
Feb 04 08:04:02 burner-red systemd[1]: Stopping User Manager for UID 618...
Feb 04 08:04:03 burner-red systemd[556]: Stopping D-Bus User Message Bus...
Feb 04 08:04:03 burner-red systemd[556]: Stopped target Default.
Feb 04 08:04:03 burner-red systemd[556]: Stopped D-Bus User Message Bus.
Feb 04 08:04:03 burner-red systemd[556]: Stopped target Basic System.
Feb 04 08:04:03 burner-red systemd[556]: Stopped target Sockets.
Feb 04 08:04:03 burner-red systemd[556]: Closed Sound System.
Feb 04 08:04:03 burner-red systemd[556]: Stopped target Paths.
Feb 04 08:04:03 burner-red systemd[556]: Stopped target Timers.
Feb 04 08:04:03 burner-red systemd[556]: Closed D-Bus User Message Bus Socket.
Feb 04 08:04:03 burner-red systemd[556]: Reached target Shutdown.
Feb 04 08:04:03 burner-red systemd[556]: Starting Exit the Session...
Feb 04 08:04:03 burner-red sddm[461]: Session started
Feb 04 08:04:03 burner-red systemd[556]: Received SIGRTMIN+24 from PID 615 (kill).
Feb 04 08:04:03 burner-red systemd[1]: Stopped User Manager for UID 618.
Feb 04 08:04:03 burner-red systemd[1]: Removed slice User Slice of sddm.
Feb 04 08:04:03 burner-red systemd[602]: Started D-Bus User Message Bus.
Feb 04 08:04:04 burner-red ksplashqml[638]: Loading stage "initial" 179
Feb 04 08:04:04 burner-red kdeinit5[658]: Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QStri
Feb 04 08:04:04 burner-red kdeinit5[663]: Initializing "kcm_access" : "kcminit_access"
Feb 04 08:04:05 burner-red kdeinit5[663]: Initializing "kded_touchpad" : "kcminit_touchpad"
Feb 04 08:04:05 burner-red kdeinit5[663]: Width: 2934 height: 1861
Feb 04 08:04:05 burner-red kdeinit5[663]: Approx. resX: 32 resY: 37
Feb 04 08:04:05 burner-red kdeinit5[663]: Touchpad resolution: x: 32 y: 32
Feb 04 08:04:05 burner-red kdeinit5[663]: Final resolution x: 32 y: 32
Feb 04 08:04:05 burner-red kdeinit5[663]: Initializing "kcm_kgamma" : "kcminit_kgamma"
Feb 04 08:04:05 burner-red kdeinit5[663]: Initializing "kcm_input" : "kcminit_mouse"
Feb 04 08:04:05 burner-red kdeinit5[663]: Initializing "kcm_style" : "kcminit_style"
Feb 04 08:04:05 burner-red kaccess[668]: QCoreApplication::arguments: Please instantiate the QApplication object first
Feb 04 08:04:05 burner-red kaccess[669]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may m
Feb 04 08:04:07 burner-red kdeinit5[660]: kf5.kded: found kded module "printmanager" by prepending 'kded_' to the library path, pleas
Feb 04 08:04:07 burner-red kdeinit5[660]: kf5.kded: found kded module "accounts" by prepending 'kded_' to the library path, please fi
Feb 04 08:04:07 burner-red ksplashqml[638]: Loading stage "kded" 3617
Feb 04 08:04:07 burner-red ksplashqml[638]: Loading stage "confupdate" 3790
Feb 04 08:04:07 burner-red dbus-daemon[625]: Activating service name='ca.desrt.dconf'
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: Backend loaded, loading core
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: Core loaded, initializing backend
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: Using XRandR
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: Screen brightness value: 3164
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: Screen brightness value max: 5273
Feb 04 08:04:07 burner-red kdeinit5[660]: powerdevil: current screen brightness value: 3164
Feb 04 08:04:08 burner-red dbus-daemon[625]: Successfully activated service 'ca.desrt.dconf'
Feb 04 08:04:08 burner-red kdeinit5[660]: powerdevil: Backend is ready, KDE Power Management system initialized
Feb 04 08:04:08 burner-red kdeinit5[660]: powerdevil: A new battery was detected
Feb 04 08:04:09 burner-red kdeinit5[660]: XSync seems available and ready
Feb 04 08:04:09 burner-red kdeinit5[660]: XSync Inited
Feb 04 08:04:09 burner-red kdeinit5[660]: Supported, init completed
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: Session path: "/org/freedesktop/login1/session/c2"
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: ACTIVE SESSION PATH: "/org/freedesktop/login1/session/c2"
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: Current session is now active
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: fd passing available: true
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: systemd powersave events handling inhibited, descriptor: 23
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: systemd support initialized
Feb 04 08:04:09 burner-red kdeinit5[660]: powerdevil: Got a valid offer for "DPMSControl"
<And much more>
I'll try the DRI3 workaround and see if it permanently fixes the problem for me to.
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Enabling DRI 3 in intel driver conf solved problem with sddm login for me.
https://wiki.archlinux.org/index.php/in … .28DRI3.29
I have optimus with bumblebee
It works. Thanks Man!
Carthago delenda est
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Enabling DRI 3 in intel driver conf solved problem with sddm login for me.
https://wiki.archlinux.org/index.php/in … .28DRI3.29
I have optimus with bumblebee
Same problem and solution here. Thanks!
I had to create the intel config file since I wasn't using it. Maybe the issue can be marked as solved since it's working with the breeze theme?
"The problem with quotes on the Internet is that it is hard to verify their authenticity." ~ Abraham Lincoln
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ilyvasile wrote:Enabling DRI 3 in intel driver conf solved problem with sddm login for me.
https://wiki.archlinux.org/index.php/in … .28DRI3.29
I have optimus with bumblebeeSame problem and solution here. Thanks!
I had to create the intel config file since I wasn't using it. Maybe the issue can be marked as solved since it's working with the breeze theme?
No. This is not a solution, it's a workaround
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Enabling DRI 3 in intel driver conf solved problem with sddm login for me.
https://wiki.archlinux.org/index.php/in … .28DRI3.29
I have optimus with bumblebee
Hi.
I have the same problem with SDDM and LightDM. Both was resetting the login screen after entering the password.
Enabling the DRI 3 solved the problem with SDDM but not with LightDM in a different pc.
I'm using optimus with bumblebee too.
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Enabling DRI 3 in intel driver conf solved problem with sddm login for me.
https://wiki.archlinux.org/index.php/in … .28DRI3.29
I have optimus with bumblebee
Solves it for me, too. Although i do not have a bumblebee setup, just a intel card.
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If enabling DRI 3 is the answer, I can mark this as SOLVED if everyone is in agreement. Or do we think this is just a different workaround than changing the theme?
Matt
"It is very difficult to educate the educated."
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Yes, this is another workaround, as long as dri2 is the default. The solution is to get this fixed in the driver.
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I'm getting this error. But I have an ATI graphics card.
I think the problematic lines from journalctl are:
Aug 22 18:58:30 tardis sddm[449]: Authentication error: "Process crashed"
Aug 22 18:58:30 tardis sddm[449]: Auth: sddm-helper crashed (exit code 15)
Aug 22 18:58:30 tardis sddm[449]: Authentication error: "Process crashed"
Aug 22 18:58:30 tardis sddm[449]: Auth: sddm-helper exited with 15
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Sakura:-
Mobo: MSI MAG X570S TORPEDO MAX // Processor: AMD Ryzen 9 5950X @4.9GHz // GFX: AMD Radeon RX 5700 XT // RAM: 32GB (4x 8GB) Corsair DDR4 (@ 3000MHz) // Storage: 1x 3TB HDD, 6x 1TB SSD, 2x 120GB SSD, 1x 275GB M2 SSD
Making lemonade from lemons since 2015.
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