Hi folks- The backstory: I bought a new el-cheapo multi-function printer-scanner today and as a consequence installed sane, xsane, and kdegraphics-ksaneplugin. I did all that while logged into my usual window manager, dwm. All was fine. Then I wanted to try the kde plugin, so logged into kde desktop and was presented with what appeared to be the blue screen of death (sometimes black). Plasma seems to start fine, i.e., splash screen goes through its usual motions, then the blue/black screen appears when the desktop usually does. However, not was all as it seemed. The entire kde suite works, i.e., mouse and keyboard, and most, but not all, applications (although to access them I need to alt-F2 and run them manually.) The only thing that does not seem to work is the desktop itself. I cannot say the packages I installed today are the cause - it could be any update within the last two weeks; as noted, I rarely log into the kde desktop. My uname -a is: Linux arch 4.2.3-1-ARCH #1 SMP PREEMPT Sat Oct 3 18:52:50 CEST 2015 x86_64 GNU/Linux My desktop is: plasma-desktop-5.4.2-1 As you can imagine, there are no shortage of google results regarding the blue/black screen. However, there was nothing current enough or otherwise useful. [1][2][3] Here's what I've tried so far, in no particular order: 1. removed kdegraphics-ksaneplugin; 2. re-installed plasma-desktop; 3. downgraded kactivities-frameworks; 4. removed ~/.kde and /tmp/kde-dutch. Logs don't show anything of importance (as I would expect, as Xorg starts and runs properly.) Top shows kwrapper5, dbus, polkit, kdeinit5, klauncher, kded5, kactivitymanager, etc., all running. Any suggestions are greatly appreciated; If further information is needed, please let me know. [1] https://bbs.archlinux.org/viewtopic.php?id=143124 [2] https://forum.kde.org/viewtopic.php?f=67&t=118151 [3] https://bbs.archlinux.org/viewtopic.php?id=193286