Tritt fast täglich auf. In den Systemeinstellungen - Anzeige und Monitor - Compositor fehlt dann die OpelGL-Schnittstelle (sonst GLX eingetragen)
Abhilfe schafft dann nur eine Neuanmeldung.
Auszüge aus dem Log vom Freeze bis zur Neuanmeldung:
25.07.16 17:27 christian-NUC systemd[1] Started Stop ureadahead data collection. 25.07.16 17:29 christian-NUC wpa_supplicant[3176] wlp1s0: WPA: Group rekeying completed with 34:31:c4:11:70:89 [GTK=CCMP] 25.07.16 17:29 christian-NUC dbus[2988] [system] Activating service name='org.debian.AptXapianIndex' (using servicehelper) 25.07.16 17:29 christian-NUC org.debian.AptXapianIndex[2988] Failed to import 'No module named 'glib'', can not use dbus 25.07.16 17:29 christian-NUC dbus[2988] [system] Activated service 'org.debian.AptXapianIndex' failed: Launch helper exited with unknown return code 1 25.07.16 17:29 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 99 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 30 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 6 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.kwalletd5[3241] slotServiceOwnerChanged ":1.48" , ":1.48" , "" 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.kwalletd5[3241] slotServiceOwnerChanged ":1.43" , ":1.43" , "" 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 2 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.kdeconnect[3241] kdeconnect.core: KdeConnect daemon starting 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 5 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.kdeconnect[3241] kdeconnect.core: Broadcasting identity packet 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.kdeconnect[3241] kdeconnect.core: KdeConnect daemon started 25.07.16 17:31 christian-NUC org.kde.kdeconnect[3241] QXcbConnection: XCB error: 3 (BadWindow), sequence: 172, resource id: 33554438, major code: 20 (GetProperty), minor code: 0 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 15 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 7 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC org.kde.kwalletd5[3241] slotServiceOwnerChanged ":1.29" , ":1.29" , "" 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) 25.07.16 17:31 christian-NUC org.kde.KScreen[3241] message repeated 7 times: [ kscreen: Primary output changed from KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" ) to KScreen::Output(Id: 67 , Name: "DP1" ) ( "DP1" )] 25.07.16 17:31 christian-NUC sddm-helper[3173] [PAM] Ended. 25.07.16 17:31 christian-NUC sddm[3159] Auth: sddm-helper exited successfully 25.07.16 17:31 christian-NUC sddm[3159] Display server stopping... 25.07.16 17:31 christian-NUC org.kde.kdeconnect[3241] The X11 connection broke (error 1). Did the X11 server die?