I compiled and installed KDE 5 from scratch succesfuly, but after the SDDM login, there's only a black screen with a cursor. If I start xterm from the console, it appears, so I'm afraid the problem is with Plasma. What's interesting is that I can start fine KDE 4 from the SDDM (only KDE 5 shows this problem, so my conclusion is that the X and graphics setup is fine): Here's the log: Failed to connect to bus: No such file or directory startkde: Starting up... kdeinit5: preparing to launch '/usr/local/kde5/lib/libexec/kf5/klauncher' kdeinit5: Launched KLauncher, pid = 799, result = 0 Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString) kdeinit5: opened connection to :0.0 kdeinit5: preparing to launch 'libkdeinit5_kded5' kdeinit5: Launched KDED, pid = 803 result = 0 kdeinit5: preparing to launch 'libkdeinit5_kcminit_startup' kdeinit5: Launched 'kcminit_startup', pid = 805 result = 0 Initializing "kcm_input" : "kcminit_mouse" kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_style" : "kcminit_style" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/solidautoeject.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/freespacenotifier.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/bluedevil.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/ksysguard.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/baloosearchmodule.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/proxyscout.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/remotedirnotify.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/desktopnotifier.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/ktimezoned.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/device_automounter.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/keyboard.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/statusnotifierwatcher.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/soliduiserver.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/kscreen.so" kf5.kded: No X-KDE-DBus-ServiceName found in "/usr/local/kde5/lib/plugins/kf5/kded/networkstatus.so" kdeinit5: Got SETENV 'GTK_RC_FILES=/etc/gtk/gtkrc:/home/fraga/.gtkrc:/home/fraga/.config/gtkrc' from launcher. kdeinit5: Got SETENV 'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/fraga/.gtkrc-2.0:/home/fraga/.config/gtkrc-2.0' from launcher. kdeinit5: Got EXEC_NEW '/usr/local/kde5/lib/libexec/kf5/kconf_update' from launcher. kdeinit5: preparing to launch '/usr/local/kde5/lib/libexec/kf5/kconf_update' Initializing "kded_touchpad" : "kcminit_touchpad" Initializing "kcm_access" : "kcminit_access" kdeinit5: PID 816 terminated. kdeinit5: Got EXEC_NEW '/usr/local/kde/bin/kaccess' from launcher. kdeinit5: preparing to launch '/usr/local/kde/bin/kaccess' kdeinit5: PID 805 terminated. Cannot find 'org.kde.KSplash.setStage' in object /KSplash at org.kde.KSplash kdeinit5: Got KWRAPPER '/usr/local/kde5/bin/ksmserver' from wrapper. kdeinit5: preparing to launch '/usr/local/kde5/bin/ksmserver' kf5.kcoreaddons.kaboutdata: Could not initialize the equivalent properties of Q*Application: no instance (yet) existing. kdeinit5: PID 817 terminated. Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" detected kglobalaccel restarting, re-registering all shortcut keys kscreen.kded: Config KScreen::Config(0x889f50) is ready kscreen.kded: UPower not available, lid detection won't work kscreen.kded: "The name org.freedesktop.UDisks2 was not provided by any .service files" kscreen.kded: PowerDevil SuspendSession action not available! kscreen.kded: "The name org.kde.Solid.PowerManagement was not provided by any .service files" kscreen.kded: Couldn't get if the device is a laptop: "The name org.freedesktop.UPower was not provided by any .service files" Qt: Session management error: networkIdsList argument is NULL Configuring Lock Action _IceTransmkdir: ERROR: euid != 0,directory /tmp/.ICE-unix will not be created. ksmserver: "/run/user/501/KSMserver" kdeinit5: Got SETENV 'SESSION_MANAGER=local/tux.abusar.org.br:@/tmp/.ICE-unix/829,unix/tux.abusar.org.br:/tmp/.ICE-unix/829' from launcher. ksmserver: KSMServer: SetAProc_loc: conn 0 , prot= local , file= @/tmp/.ICE-unix/829 ksmserver: KSMServer: SetAProc_loc: conn 1 , prot= unix , file= /tmp/.ICE-unix/829 ksmserver: KSMServer::restoreSession "saved at previous logout" ksmserver: Autostart 0 done ksmserver: Kcminit phase 1 done ksmserver: Autostart 1 done Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" BluezQt: Cannot open /dev/rfkill for reading! kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp" bluedevil: Created realPath called with a relative path 'etc/xdg/./', please fix realPath called with a relative path 'etc/xdg/config/', please fix No such schema “org.gnome.desktop.a11y.applications” Trying to convert empty KLocalizedString to QString. Trying to convert empty KLocalizedString to QString. Trying to convert empty KLocalizedString to QString. org.kde.kcm_keyboard: Failed to open layout memory xml file for reading "/home/fraga/.local/share/kded5/keyboard/session/layout_memory.xml" error: 5 kf5.kded: found kded module "touchpad" by prepending 'kded_' to the library path, please fix your metadata. Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" Failed enumerating UDisks2 objects: "org.freedesktop.DBus.Error.ServiceUnknown" "The name org.freedesktop.UDisks2 was not provided by any .service files" bluedevil: Bluetooth operational changed false bluedevil: ObexManager operational changed false BluezQt: PendingCall Error: "Launch helper exited with unknown return code 1" BluezQt: PendingCall Error: "Process org.bluez.obex exited with status 1" ksmserver: Starting notification thread ksmserver: Kcminit phase 2 done ksmserver: Starting autostart service "/home/fraga/.config/autostart/IRkick.desktop" ksmserver: Starting autostart service "/home/fraga/.config/autostart/KNut client.desktop" ksmserver: Starting autostart service "/home/fraga/.config/autostart/wakoopa.desktop" ksmserver: Starting autostart service "/etc/xdg/autostart/wicd-tray.desktop" ksmserver: Autostart 2 done kwin_xkbcommon: XKB: couldn't find a Compose file for locale "en_US.UTF-8" ksmserver: autostart service "/usr/bin/wicd-gtk" finished with exit code 1 kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_input" : "kcminit_mouse" completeShutdownOrCheckpoint called OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile OpenGL version string: 3.0 Mesa 13.0.2 (git-3a9f628) OpenGL shading language version string: 1.30 Driver: Intel GPU class: Haswell OpenGL version: 3.0 GLSL version: 1.30 Mesa version: 13.0.2 X server version: 1.19 Linux kernel version: 4.8.13 Requires strict binding: yes GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no kdeinit5: Got SETENV 'KDE_MULTIHEAD=false' from launcher. Initializing "kcm_input" : "kcminit_mouse" QXcbConnection: XCB error: 3 (BadWindow), sequence: 3755, resource id: 16777224, major code: 18 (ChangeProperty), minor code: 0 ********************* And here everything I installed (maybe I missed something?): Frameworks (5.28.0): extra-cmake-modules phonon attica kitemmodels kitemviews kplotting threadweaver kcodecs kguiaddons kidletime kwidgetsaddons sonnet kconfig kwindowsystem solid kcoreaddons kcrash kdbusaddons ki18n kservice kglobalaccel karchive kdoctools bluez-qt kjs kimageformats kauth kjobwidgets kcompletion kdnssd kconfigwidgets kiconthemes knotifications kwallet kpty kemoticons kdesu ktextwidgets kxmlgui kbookmarks kio kdesignerplugin knewstuff kparts kpackage kdeclarative kcmutils kinit kded knotifyconfig kunitconversion kjsembed kross kmediaplayer ktexteditor kapidox frameworkintegration kdelibs4support kactivities kactivities-stats kwayland plasma-framework oxygen-icons5 kxmlrpcclient kpeople krunner kfilemetadata baloo breeze-icons ***************** Plasma (5.8.4): libksysguard ksysguard kdecoration kscreenlocker breeze kwayland-integration kwin plasma-workspace plasma-desktop plasma-integration oxygen bluedevil kwallet-pam libkscreen kscreen powerdevil sddm-kcm systemsettings discover *** Any hints? Thanks!
I made some progress. There're a few environment variables which affect this issue: QT_PLUGIN_PATH XDG_DATA_DIRS (With this one I can see the spinning wheel with the KDE logo) QT_QPA_PLATFORM_PLUGIN_PATH QML_IMPORT_PATH QML2_IMPORT_PATH and one of the last ones made plasmashell stop complaining about missing shell modules. Now I see the KDE logo, then is disappears and the screen stays black.
This isn't really the right place to provide this kind of support but perhaps this wiki page might help you: https://community.kde.org/Guidelines_and_HOWTOs/Build_from_source#Set_up_a_script_for_preparing_the_environment If you still have issues feel free to ping us in #plasma on Freenode IRC or visit the KDE forums.