Thank you to all the guys that responded to this very quickly. I just want to say that I am also experiencing the same issue - my monitor is connected via DisplayPort. It's a Dell U3011 - connecting to an NVidia GeForce GTX680. When I turn it off via the power button, and then switch it back on. I must switch to a different TTY (CTRL+ALT+F#) and then back to TTY7 (CTRL+ALT+F7) - whereupon I am greeted by a bug/crash handler window saying kdeinit4 has crashed. For information, here is some data on my setup. If you want any more info or logs or anything, just ask please! =) --------------------- menthurae@raptor:~$ apt-cache policy libkscreen0 kscreen libkscreen0: Installed: 0.0.92-0ubuntu1~ppa1 Candidate: 0.0.92-0ubuntu1~ppa1 Version table: *** 0.0.92-0ubuntu1~ppa1 0 500 http://ppa.launchpad.net/kubuntu-ppa/experimental/ubuntu/ raring/main amd64 Packages 100 /var/lib/dpkg/status 0.0.92-0ubuntu0.1 0 500 http://ftp.iinet.net.au/pub/ubuntu/ raring-updates/universe amd64 Packages 0.0.81-0ubuntu2 0 500 http://ftp.iinet.net.au/pub/ubuntu/ raring/universe amd64 Packages kscreen: Installed: 0.0.92-0ubuntu1~ppa2 Candidate: 0.0.92-0ubuntu1~ppa2 Version table: *** 0.0.92-0ubuntu1~ppa2 0 500 http://ppa.launchpad.net/kubuntu-ppa/experimental/ubuntu/ raring/main amd64 Packages 100 /var/lib/dpkg/status 0.0.92-0ubuntu0.2 0 500 http://ftp.iinet.net.au/pub/ubuntu/ raring-updates/universe amd64 Packages 0.0.81-0ubuntu2 0 500 http://ftp.iinet.net.au/pub/ubuntu/ raring/universe amd64 Packages --------------------- menthurae@raptor:~$ apt-cache policy nvidia-313-updates nvidia-313-updates: Installed: 313.30-0ubuntu1 Candidate: 313.30-0ubuntu1 Version table: *** 313.30-0ubuntu1 0 500 http://ftp.iinet.net.au/pub/ubuntu/ raring/restricted amd64 Packages 100 /var/lib/dpkg/status --------------------- // Not sure if the output from the command below is helpful or not...! menthurae@raptor:~$ cat /var/log/* | grep kdeinit4 cat: /var/log/apt: Is a directory Jun 23 20:09:58 raptor dbus[833]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1075 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2215 comm="kdeinit4: kded4 [kdeinit] ") Jun 23 20:32:24 raptor dbus[833]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1075 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.90" (uid=1000 pid=4495 comm="kdeinit4: kded4 [kdeinit]") Jun 24 06:22:30 raptor dbus[833]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1075 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.109" (uid=1000 pid=4956 comm="kdeinit4: kded4 [kdeinit]") Jun 24 17:19:08 raptor dbus[841]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1114 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2226 comm="kdeinit4: kded4 [kdeinit] ") Jun 25 06:19:46 raptor dbus[828]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1107 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2223 comm="kdeinit4: kded4 [kdeinit] ") Jun 26 22:58:57 raptor dbus[828]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1107 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.262" (uid=1000 pid=6691 comm="kdeinit4: kded4 [kdeinit]") Jun 27 06:38:46 raptor dbus[850]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1153 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2234 comm="kdeinit4: kded4 [kdeinit] ") Jun 27 20:57:52 raptor dbus[839]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1179 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2257 comm="kdeinit4: kded4 [kdeinit] ") Jun 18 10:31:25 raptor dbus[805]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1083 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2229 comm="kdeinit4: kded4 [kdeinit] ") Jun 18 20:52:52 raptor dbus[838]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1117 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2155 comm="kdeinit4: kded4 [kdeinit] ") Jun 18 22:42:39 raptor dbus[787]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1079 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2134 comm="kdeinit4: kded4 [kdeinit] ") Jun 19 23:04:29 raptor dbus[768]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1057 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.19" (uid=1000 pid=2145 comm="kdeinit4: kded4 [kdeinit] ") Jun 21 21:15:02 raptor dbus[768]: [system] Rejected send message, 2 matched rules; type="method_return", sender=":1.5" (uid=110 pid=1057 comm="/usr/lib/colord/colord ") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.153" (uid=1000 pid=12104 comm="kdeinit4: kded4 [kdeinit] ")