Fedora 30, KDE Plasma Workspaces was installed and works properly. When attempting to login with Wayland Plasma, instant black screen with frozen mouse pointer. CTRL+ALT+1/2/3 doesn't switch consoles I have to hard reset. When I launch startplasmacompositor from TTY in a non wayland session I see the following error codes:
I have tried a fresh user profile but same. Any suggestions?

Code: Select all

$ export $(dbus-launch) && startplasmacompositor
startplasmacompositor: Starting up...
dbus-update-activation-environment: warning: error sending to systemd: org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
No backend specified through command line argument, trying auto resolution
OpenGL vendor string:                   X.Org
OpenGL renderer string:                 Radeon RX 580 Series (POLARIS10, DRM 3.32.0, 5.2.15-200.fc30.x86_64, LLVM 8.0.0)
OpenGL version string:                  4.5 (Compatibility Profile) Mesa 19.1.6
OpenGL shading language version string: 4.50
Driver:                                 RadeonSI
GPU class:                              Arctic Islands
OpenGL version:                         4.5
GLSL version:                           4.50
Mesa version:                           19.1.6
Linux kernel version:                   5.2.15
Requires strict binding:                no
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
glamor: No eglstream capable devices found
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
X-Server started on display :1
Could not create scene graph context for backend 'opengl' - check that plugins are installed correctly in /usr/lib64/qt5/plugins
org.kde.knotifications: env says KDE is running but SNI unavailable -- check KDE_FULL_SESSION and XDG_CURRENT_DESKTOP
(WW) avc:  denied  { grab } for request=X11:GrabServer comm=/usr/bin/kwin_wayland scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=x_server permissive=0
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported maximum keycode 569, clipping.
>                   X11 cannot support keycodes above 255.
> Internal error:   Could not resolve keysym XF86MonBrightnessCycle
> Internal error:   Could not resolve keysym XF86RotationLockToggle
Errors from xkbcomp are not fatal to the X server
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/Xwayland (OsLookupColor+0x13c) [0x5595d7e2640c]
(EE) 1: /usr/lib64/libpthread.so.0 (funlockfile+0x50) [0x7f1e8a952caf]
(EE) 2: /usr/lib64/libc.so.6 (__strlen_avx2+0x15) [0x7f1e8a8d45e5]
(EE) 3: /usr/lib64/libc.so.6 (__vfprintf_internal+0x235e) [0x7f1e8a7e0a1e]
(EE) 4: /usr/lib64/libc.so.6 (__vsnprintf_internal+0xaa) [0x7f1e8a7f247a]
(EE) 5: /usr/lib64/libc.so.6 (__snprintf_chk+0xa1) [0x7f1e8a882591]
(EE) 6: /usr/lib64/libselinux.so.1 (security_compute_av_flags_raw+0x129) [0x7f1e8b181919]
(EE) 7: /usr/lib64/libselinux.so.1 (avc_has_perm_noaudit+0x1de) [0x7f1e8b17e5fe]
(EE) 8: /usr/lib64/libselinux.so.1 (avc_has_perm+0x49) [0x7f1e8b17e6d9]
(EE) 9: /usr/bin/Xwayland (XaceIsLocal+0x16ca) [0x5595d7d4107a]
(EE) 10: /usr/bin/Xwayland (XaceIsLocal+0x24ec) [0x5595d7d42bfc]
(EE) 11: /usr/bin/Xwayland (_CallCallbacks+0x3c) [0x5595d7df578c]
(EE) 12: /usr/bin/Xwayland (XaceHook+0x15e) [0x5595d7d3da8e]
(EE) 13: /usr/bin/Xwayland (dixLookupResourceByType+0x12f) [0x5595d7e166df]
(EE) 14: /usr/bin/Xwayland (fbSolid+0x1339) [0x5595d7d01ce9]
(EE) 15: /usr/bin/Xwayland (SendErrorToClient+0x354) [0x5595d7df0334]
(EE) 16: /usr/bin/Xwayland (InitFonts+0x3b4) [0x5595d7df43d4]
(EE) 17: /usr/lib64/libc.so.6 (__libc_start_main+0xf3) [0x7f1e8a79bf43]
(EE) 18: /usr/bin/Xwayland (_start+0x2e) [0x5595d7cc33ee]
(EE)
(EE) Segmentation fault at address 0x20200001
(EE)
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting
(EE)
XIO:  fatal IO error 2 (No such file or directory) on X server ":1"
      after 30 requests (30 known processed) with 0 events remaining.
startplasma: Starting up...
The X11 connection broke (error 1). Did the X11 server die?
xprop:  unable to open display ':1'
xprop:  unable to open display ':1'
dbus-update-activation-environment: warning: error sending to systemd: org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
^C


I'm not an expert, and I moved from Fedora some time ago because I could not keep up with the update speed. But I remember that it was a bit difficult with proprietary video drivers. It seems from the log that you are using AMD drivers, did you try to fall back to Nouveau?