Las one has been not when shutting down but when doing a logout. Screen went black and nothing did respond, so I had to switch off with the button.
Nov 21 01:05:51 andromeda kded5[2652]: Service "org.kde.StatusNotifierHost-2753" unregistered
Nov 21 01:05:51 andromeda plasmashell[2753]: **file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml:77:5: Unable to assign [undefined] to QObject***
Nov 21 01:05:51 andromeda plasmashell[2753]: **file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml:132: TypeError: Type error**
Nov 21 01:05:51 andromeda plasmashell[2753]: libkcups: Cancel-Subscription last error: 0 successful-ok
Nov 21 01:05:51 andromeda plasmashell[2753]: libkcups: Create-Printer-Subscriptions last error: 0 successful-ok
Nov 21 01:05:51 andromeda plasmashell[2753]: libkcups: Cancel-Subscription last error: 0 successful-ok
Nov 21 01:05:51 andromeda systemd[2441]: tmp-.mount_NextclbwE6YI.mount: Succeeded.
Nov 21 01:05:51 andromeda systemd[1]: tmp-.mount_NextclbwE6YI.mount: Succeeded.
Nov 21 01:05:51 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25741, resource id: 67108891, major code: 18 (ChangeProperty), minor code: 0**
Nov 21 01:05:51 andromeda dbus-daemon[2558]: [session uid=1001 pid=2556] Successfully activated service 'org.kde.kdeconnect'
Nov 21 01:05:51 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25766, resource id: 96469049, major code: 15 (QueryTree), minor code: 0**
Nov 21 01:05:51 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25771, resource id: 96469049, major code: 18 (ChangeProperty), minor code: 0**
Nov 21 01:05:51 andromeda plasmashell[2753]: **file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:306:17: QML QQuickText: Binding loop detected for property "width"**
Nov 21 01:05:51 andromeda plasmashell[2753]: **file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:306:17: QML QQuickText: Binding loop detected for property "width"**
Nov 21 01:05:52 andromeda plasmashell[2753]: **libpng warning: iCCP: known incorrect sRGB profile**
Nov 21 01:05:52 andromeda plasmashell[2753]: **libpng warning: iCCP: known incorrect sRGB profile**
Nov 21 01:05:52 andromeda plasmashell[2753]: **libpng warning: iCCP: known incorrect sRGB profile**
Nov 21 01:05:52 andromeda plasmashell[2753]: **libpng warning: iCCP: known incorrect sRGB profile**
Nov 21 01:05:52 andromeda plasmashell[2753]: **file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:306:17: QML QQuickText: Binding loop detected for property "width"**
Nov 21 01:05:52 andromeda plasmashell[2753]: **trying to show an empty dialog**
Nov 21 01:05:52 andromeda plasmashell[2753]: **trying to show an empty dialog**
Nov 21 01:05:52 andromeda kdeconnectd[7940]: **kdeconnect.core: Could not query capabilities from notifications server**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25909, resource id: 56623283, major code: 18 (ChangeProperty), minor code: 0**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **QMetaProperty::read: Unable to handle unregistered datatype 'KWin::SessionState' for property 'KWin::EffectsHandler::sessionState'**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **QMetaProperty::read: Unable to handle unregistered datatype 'KWin::SessionState' for property 'KWin::EffectsHandler::sessionState'**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25910, resource id: 56623115, major code: 15 (QueryTree), minor code: 0**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25915, resource id: 56623115, major code: 18 (ChangeProperty), minor code: 0**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25986, resource id: 56623123, major code: 15 (QueryTree), minor code: 0**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 25997, resource id: 56623135, major code: 15 (QueryTree), minor code: 0**
Nov 21 01:05:52 andromeda kwin_x11[2747]: **qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 26013, resource id: 56623163, major code: 15 (QueryTree), minor code: 0**
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: bluedevil: Destroyed
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda startplasma-x11[2454]: **QProcess: Destroyed while process ("ksplashqml") is still running.**
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda sddm-helper[2439]: [PAM] Closing session
Nov 21 01:05:54 andromeda kded5[2652]: **QDBusAbstractAdaptor: Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule***
Nov 21 01:05:54 andromeda sddm-helper[2439]: pam_unix(sddm:session): session closed for user fernando
Nov 21 01:05:54 andromeda sddm-helper[2439]: [PAM] Ended.
Nov 21 01:05:54 andromeda sddm[2288]: Auth: sddm-helper exited successfully
Nov 21 01:05:54 andromeda sddm[2288]: Socket server stopping...
Nov 21 01:05:54 andromeda sddm[2288]: Socket server stopped.
Nov 21 01:05:54 andromeda sddm[2288]: Display server stopping...
Nov 21 01:05:54 andromeda xdg-desktop-por[3089]: **xdg-desktop-portal-gtk: Fatal IO error 11 (Recurso no disponible temporalmente) on X server :0.**
Nov 21 01:05:54 andromeda systemd-logind[1373]: Session 2 logged out. Waiting for processes to exit.
Nov 21 01:05:54 andromeda xdg-desktop-portal-kde[2683]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda xdg-desktop-por[2649]: **xdg-desktop-portal-gtk: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.**
Nov 21 01:05:54 andromeda at-spi-bus-launcher[2630]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Nov 21 01:05:54 andromeda at-spi-bus-launcher[2630]: after 1265 requests (1265 known processed) with 0 events remaining.
Nov 21 01:05:54 andromeda xdg-desktop-portal-kde[3112]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda org.gtk.vfs.Daemon[2841]: **A connection to the bus can't be made**
Nov 21 01:05:54 andromeda kdeconnectd[7940]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda kactivitymanagerd[2790]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda kwalletd5[3268]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda kscreen_backend_launcher[2918]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda kglobalaccel5[2726]: **The X11 connection broke (error 1). Did the X11 server die?**
Nov 21 01:05:54 andromeda systemd[2441]: **xdg-desktop-portal-gtk.service: Main process exited, code=exited, status=1/FAILURE**
Nov 21 01:05:54 andromeda systemd[2441]: **xdg-desktop-portal-gtk.service: Failed with result 'exit-code'.**
Nov 21 01:05:55 andromeda systemd[2441]: pulseaudio.service: Succeeded.
Nov 21 01:05:58 andromeda kernel: **nvidia-modeset: WARNING: GPU:0: Lost display notification (0:0x00000000); continuing.**
Nov 21 01:05:59 andromeda sddm[2288]: Removing display ":0" ...
Nov 21 01:05:59 andromeda sddm[2288]: Adding new display on vt 7 ...
Nov 21 01:05:59 andromeda sddm[2288]: Loading theme configuration from ""
Nov 21 01:05:59 andromeda sddm[2288]: Display server starting...
Nov 21 01:05:59 andromeda sddm[2288]: Adding cookie to "/run/sddm/{b198a764-07d5-47df-a164-12f85aa0cd4c}"
Nov 21 01:05:59 andromeda sddm[2288]: Running: /usr/bin/X -nolisten tcp -auth /run/sddm/{b198a764-07d5-47df-a164-12f85aa0cd4c} -background none -noreset -displayfd 18 -seat seat0 vt7
Nov 21 01:06:22 andromeda kernel: **nvidia-modeset: ERROR: GPU:0: Idling display engine timed out: 0x0000857d:0:0**
Nov 21 01:06:31 andromeda kernel: **NVRM: GPU at PCI:0000:07:00: GPU-ce2c1f42-5783-3825-07b3-5af1a0d27f42**
Nov 21 01:06:31 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b4e**
Nov 21 01:06:39 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b4f**
Nov 21 01:06:48 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b50**
Nov 21 01:06:56 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b51**
Nov 21 01:07:04 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b52**
Nov 21 01:07:12 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b53**
Nov 21 01:07:20 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b54**
Nov 21 01:07:29 andromeda kernel: **NVRM: Xid (PCI:0000:07:00): 16, Head 00000001 Count 00020b55**
So it seems it something about the graphics card