When I log on sddm, it's a bit longer than usual. Selected data from journald:
juil. 09 18:20:56 tc2 sddm[4381]: Initializing... juil. 09 18:20:56 tc2 sddm[4381]: Starting... juil. 09 18:20:56 tc2 sddm[4381]: Adding new display on vt 7 ... juil. 09 18:20:56 tc2 sddm[4381]: Display server starting... juil. 09 18:20:56 tc2 sddm[4381]: Running: /usr/bin/X -nolisten tcp -auth /var/run/sddm/{1f97de64-0419-4dbf-9139-54df65e9c879} -background none -noreset -displayfd 18 vt7 juil. 09 18:20:56 tc2 acpid[1493]: client 4280[0:0] has disconnected juil. 09 18:20:56 tc2 acpid[1493]: client connected from 4384[0:0] juil. 09 18:20:56 tc2 acpid[1493]: 1 client rule loaded juil. 09 18:20:57 tc2 sddm[4381]: Running display setup script "/usr/share/sddm/scripts/Xsetup" juil. 09 18:20:57 tc2 sddm[4381]: Display server started. juil. 09 18:20:57 tc2 sddm[4381]: Socket server starting... juil. 09 18:20:57 tc2 sddm[4381]: Socket server started. juil. 09 18:20:57 tc2 sddm[4381]: Greeter starting... juil. 09 18:20:57 tc2 sddm[4381]: Adding cookie to "/var/run/sddm/{1f97de64-0419-4dbf-9139-54df65e9c879}" juil. 09 18:20:57 tc2 sddm-helper[4393]: [PAM] Starting... juil. 09 18:20:57 tc2 sddm-helper[4393]: [PAM] Authenticating... juil. 09 18:20:57 tc2 sddm-helper[4393]: [PAM] returning. juil. 09 18:20:57 tc2 systemd-logind[1517]: New session 48440 of user sddm. juil. 09 18:20:57 tc2 systemd[1]: Started Session 48440 of user sddm. juil. 09 18:20:57 tc2 sddm-helper[4393]: pam_unix(sddm-greeter:session): session opened for user sddm by (uid=0) juil. 09 18:20:57 tc2 sddm-helper[4393]: pam_systemd(sddm-greeter:session): Cannot create session: Already running in a session juil. 09 18:20:57 tc2 sddm[4381]: Greeter session started successfully juil. 09 18:20:57 tc2 sddm-greeter[4396]: Reading from "/usr/share/xsessions/plasma.desktop" juil. 09 18:20:57 tc2 sddm-greeter[4396]: Reading from "/usr/share/xsessions/twm.desktop" juil. 09 18:20:57 tc2 sddm-greeter[4396]: Connected to the daemon. juil. 09 18:20:57 tc2 sddm[4381]: Message received from greeter: Connect juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed43b0) juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed43b0) juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed43b0) juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed43b0) juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject::installEventFilter(): Cannot filter events for objects in a different thread. juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed4 juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject: Cannot create children for a parent that is in a different thread. (Parent is SDDM::GreeterApp(0x7ffe3d2bba20), parent's thread is QThread(0xe821b0), current thread is QThread(0xed4 juil. 09 18:20:57 tc2 sddm-greeter[4396]: QObject::installEventFilter(): Cannot filter events for objects in a different thread. juil. 09 18:20:57 tc2 sddm-greeter[4396]: file:///usr/share/sddm/themes/breeze/components/InfoPane.qml:52:22: Unable to assign [undefined] to int juil. 09 18:20:57 tc2 sddm-greeter[4396]: Adding view for "HDMI1" QRect(1280,0 1920x1200) juil. 09 18:20:58 tc2 sddm-greeter[4396]: file:///usr/share/sddm/themes/breeze/components/InfoPane.qml:52:22: Unable to assign [undefined] to int juil. 09 18:20:58 tc2 sddm-greeter[4396]: Adding view for "VGA1" QRect(0,0 1280x1024) juil. 09 18:20:58 tc2 sddm-greeter[4396]: Message received from daemon: Capabilities juil. 09 18:20:58 tc2 sddm-greeter[4396]: Message received from daemon: HostName juil. 09 18:20:59 tc2 systemd-logind[1517]: Removed session 48437. juil. 09 18:21:01 tc2 sddm-greeter[4396]: Reading from "/usr/share/xsessions/plasma.desktop" juil. 09 18:21:01 tc2 sddm[4381]: Message received from greeter: Login juil. 09 18:21:01 tc2 sddm[4381]: Reading from "/usr/share/xsessions/plasma.desktop" juil. 09 18:21:01 tc2 sddm[4381]: Session "/usr/share/xsessions/plasma.desktop" selected, command: "/usr/bin/startkde" juil. 09 18:21:01 tc2 sddm-helper[4410]: [PAM] Starting... juil. 09 18:21:01 tc2 sddm-helper[4410]: [PAM] Authenticating... juil. 09 18:21:01 tc2 sddm-helper[4410]: [PAM] Preparing to converse... juil. 09 18:21:01 tc2 sddm-helper[4410]: [PAM] Conversation with 1 messages juil. 09 18:21:01 tc2 sddm-helper[4410]: [PAM] returning. juil. 09 18:21:01 tc2 sddm[4381]: Authenticated successfully juil. 09 18:21:01 tc2 sddm-greeter[4396]: Message received from daemon: LoginSucceeded juil. 09 18:21:01 tc2 systemd-logind[1517]: New session 48441 of user benoit. juil. 09 18:21:02 tc2 systemd[1]: Started Session 48441 of user benoit. juil. 09 18:21:02 tc2 sddm-helper[4393]: [PAM] Ended. juil. 09 18:21:02 tc2 sddm-helper[4410]: pam_unix(sddm:session): session opened for user benoit by (uid=0) juil. 09 18:21:02 tc2 sddm-helper[4410]: pam_systemd(sddm:session): Cannot create session: Already running in a session juil. 09 18:21:02 tc2 sddm[4381]: Auth: sddm-helper exited successfully juil. 09 18:21:02 tc2 sddm[4381]: Greeter stopped. juil. 09 18:21:02 tc2 sddm-helper[4410]: Starting: "/etc/sddm/Xsession" "/usr/bin/startkde" juil. 09 18:21:02 tc2 sddm-helper[4415]: Adding cookie to "/home/benoit/.Xauthority" juil. 09 18:21:02 tc2 sddm[4381]: Session started juil. 09 18:21:02 tc2 console-kit-daemon[4002]: (process:4476): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed juil. 09 18:21:02 tc2 console-kit-daemon[4002]: missing action juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Connected output 69 to CRTC 63 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Connected output 71 to CRTC 64 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xcb.helper: Detected XRandR 1.4 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xcb.helper: Event Base: 89 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xcb.helper: Event Error: 147 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen: Loading "XRandR" backend juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: XRandR::setConfig juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Requested screen size is QSize(3200, 1200) juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Needed CRTCs: 2 juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Actions to perform: juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Primary Output: false juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Change Screen Size: false juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Disable outputs: false juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Change outputs: false juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: Enable outputs: false juil. 09 18:21:02 tc2 org.kde.KScreen[4456]: kscreen.xrandr: XRandR::setConfig done! juil. 09 18:21:03 tc2 polkitd(authority=local)[3123]: Registered Authentication Agent for unix-session:48441 (system bus name :1.46927 [/usr/lib/x86_64-linux-gnu/libexec/polkit-kde-authentication-agent-1], object path /org/kde/PolicyKit1/AuthenticationAgent, locale fr_FR.UTF-8) juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Successfully made thread 4588 of process 4588 (n/a) owned by '1000' high priority at nice level -11. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 1 threads of 1 processes of 1 users. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 1 threads of 1 processes of 1 users. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Successfully made thread 4617 of process 4588 (n/a) owned by '1000' RT at priority 5. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 2 threads of 1 processes of 1 users. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 2 threads of 1 processes of 1 users. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Successfully made thread 4622 of process 4588 (n/a) owned by '1000' RT at priority 5. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 3 threads of 1 processes of 1 users. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Successfully made thread 4630 of process 4630 (n/a) owned by '1000' high priority at nice level -11. juil. 09 18:21:03 tc2 rtkit-daemon[4199]: Supervising 4 threads of 2 processes of 1 users. juil. 09 18:21:03 tc2 pulseaudio[4630]: [pulseaudio] pid.c: Daemon already running.