我已经从Fedora 29升级到Fedora 30。虽然root可以正常使用KDE，但我无法作为普通用户使用它，所以看起来与权限有关。出现一个几乎黑色的全屏窗口，屏幕中间有一个响应灵敏的鼠标箭头。一些可能相关的数据：
/lib64/libQt5DBus.so.5即使重新安装后，我也发现了问题。
我在普通用户 Xorg.0.log 文件中没有看到任何错误，如果需要我可以发布它。
我还看到了一些与 kglobalaccel 相关的错误，但删除 .local、.config 和 .kde 文件夹也没有帮助。但journalctl说（不知道该怎么办）：
systemd[1133]: Started dbus-:[email protected].
kglobalaccel5[1531]: qt.qpa.xcb: could not connect to display
audit[1531]: ANOM_ABEND auid=500 uid=500 gid=500 ses=2 pid=1531 comm="kglobalaccel5" exe="/usr/bin/kglobalaccel5" sig=6 res=1
kglobalaccel5[1531]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
kglobalaccel5[1531]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
systemd[1]: Created slice system-systemd\x2dcoredump.slice.
audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@0-1537-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
systemd[1]: Started Process Core Dump (PID 1537/UID 0).
dbus-broker-launch[1483]: Activation request for 'org.freedesktop.Telepathy.Client.KTp.Approver' failed.
dbus-broker-launch[1483]: Activation request for 'org.freedesktop.Telepathy.Client.KTp.KdedIntegrationModule' failed.
systemd[1133]: dbus-:[email protected]: Main process exited, code=dumped, status=6/ABRT
systemd[1133]: dbus-:[email protected]: Succeeded.
systemd-coredump[1541]: Process 1531 (kglobalaccel5) of user 500 dumped core.
Stack trace of thread 1531:
#0 0x00007fd273722e75 raise (libc.so.6)
#1 0x00007fd27370d895 abort (libc.so.6)
#2 0x00007fd273b33af5 _ZNK14QMessageLogger5fatalEPKcz (libQt5Core.so.5)
#3 0x00007fd2740dc29f _ZN22QGuiApplicationPrivate25createPlatformIntegrationEv (libQt5Gui.so.5)
#4 0x00007fd2740dcaf8 _ZN22QGuiApplicationPrivate21createEventDispatcherEv (libQt5Gui.so.5)
#5 0x00007fd273d16975 _ZN23QCoreApplicationPrivate4initEv (libQt5Core.so.5)
#6 0x00007fd2740de253 _ZN22QGuiApplicationPrivate4initEv (libQt5Gui.so.5)
#7 0x00007fd2740df198 _ZN15QGuiApplicationC2ERiPPci (libQt5Gui.so.5)
#8 0x0000555c57159481 n/a (kglobalaccel5)
#9 0x00007fd27370ef33 __libc_start_main (libc.so.6)
#10 0x0000555c571597de n/a (kglobalaccel5)
查看一些控制台输出：
Using system config directory "/usr/share/X11/xorg.conf.d"
xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted)
(II) modeset(0): Initializing kms color map for depth 24, 8 bpc.
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Internal error: Could not resolve keysym XF86MonBrightnessCycle
> Internal error: Could not resolve keysym XF86RotationLockToggle
Errors from xkbcomp are not fatal to the X server
startkde: Starting up...
dbus-update-activation-environment: warning: error sending to systemd: org.freedesktop.DBus.Error.InvalidArgs: Invalid environment assignments
Connecting to deprecated signal QDBusConnectionInterface:serviceOwnerChanged(QString,QString,QString)
Cannot find �rg.kde.KSplash.setStage' in object /KSplash at org.kde.KSplash
kf5.kded: found kded module "colord" by prepending 'kded_' to the library path, please fix your metadata.
Qt: Session management error: networkIdsList argument is NULL
colord: "/home/gato/.local/share/icc/.." is not an ICC profile
colord: "/home/gato/.local/share/icc/." is not an ICC profile
(II) AIGLX: Suspending AIGLX clients for VT switch
The X11 connection broke (error 1). Did the X11 server die?
kdeinit5: Fatal IO error: client killed
kdeinit5: sending SIGHUP to children.
klauncher: Exiting on signal 1
kdeinit5: sending SIGTERM to children.
kdeinit5: Exit.
Unexpected response from KInit (response = 0).
startkde: Could not start ksmserver. Check your installation.
Error: Can't open display: :0.0
(II) Server terminated successfully (0). Closing log file.
xinit: connection to X server lost
GOT SIGHUP
Antares:~> startkde: Shutting down...
kdeinit5_wrapper: Warning: connect(/run/user/500/kdeinit5__0) failed: : No such file or directory
Error: Can not contact kdeinit5!
xprop: unable to open display ':0.0'
xprop: unable to open display ':0.0'
startkde: Done.
Couldn't start kglobalaccel from org.kde.kglobalaccel.service: QDBusError("org.freedesktop.DBus.Error.NoReply", "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.")
The X11 connection broke (error 1). Did the X11 server die?
答案1
问题是新的 xinit 与我的旧 .xinitrc 文件不兼容。我将 .xinitrc 的内容添加到 .profile 中，一切又恢复正常了。