After last updates i've noticed that plasma on wayland acts weird. After
some digging i found this when i run glxinfo:
Extended renderer info (GLX_MESA_query_renderer):
Vendor: VMware, Inc. (0xffffffff)
Device: llvmpipe (LLVM 9.0, 256 bits) (0xffffffff)
Version: 19.2.1
Accelerated: no
Video memory: 15874MB
Unified memory: no
Preferred profile: core (0x1)
Max core profile version: 3.3
Max compat profile version: 3.1
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.0
OpenGL vendor string: VMware, Inc.
This means Plasma on wayland somehow switches to software renederes instead
of DRM one.
When i run weston glxinfo says i'm running i915 DRM renderer, which is ok.
Digging more in ./local/share/sddm/wayland-session.log with some exported
debug variables (QT_QPA_PLATFORM=wayland-egl EGL_LOG_LEVEL=debug
MESA_DEBUG=1 LIBGL_DEBUG=verbose)
[tpg@tpg-80xl sddm]$ cat wayland-session.log
dbus-update-activation-environment: warning: error sending to systemd:
org.freedesktop.DBus.Error.ServiceUnknown: The name
org.freedesktop.systemd1 was not provided by any .service files
QCommandLineParser: already having an option named "h"
QCommandLineParser: already having an option named "help-all"
QCommandLineParser: already having an option named "v"
No backend specified through command line argument, trying auto resolution
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed
_XSERVTransMakeAllCOTSServerListeners: server already running
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/tpg/.drirc: No such file or
directory.
libEGL debug: pci id for fd 7: 8086:5917, driver i965
libEGL debug: MESA-LOADER: dlopen(/usr/lib64/dri/i965_dri.so)
libEGL debug: found extension `DRI_Core'
libEGL info: found extension DRI_Core version 2
libEGL debug: found extension `DRI_IMAGE_DRIVER'
libEGL info: found extension DRI_IMAGE_DRIVER version 1
libEGL debug: found extension `DRI_DRI2'
libEGL debug: found extension `DRI_DriverVtable'
libEGL debug: found extension `DRI_ConfigOptions'
libEGL debug: found extension `DRI_Core'
libEGL debug: found extension `DRI_IMAGE_DRIVER'
libEGL debug: found extension `DRI_DRI2'
libEGL debug: found extension `DRI_DriverVtable'
libEGL debug: found extension `DRI_ConfigOptions'
libEGL info: found extension DRI_ConfigOptions version 1
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/tpg/.drirc: No such file or
directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/tpg/.drirc: No such file or
directory.
libEGL debug: found extension `DRI_TexBuffer'
libEGL info: found extension DRI_TexBuffer version 3
libEGL debug: found extension `DRI2_Fence'
libEGL debug: found extension `DRI2_Flush'
libEGL info: found extension DRI2_Flush version 4
libEGL debug: found extension `DRI_IMAGE'
libEGL info: found extension DRI_IMAGE version 16
libEGL debug: found extension `DRI_RENDERER_QUERY'
libEGL debug: found extension `DRI_MutableRenderBufferDriver'
libEGL debug: found extension `DRI_CONFIG_QUERY'
libEGL debug: found extension `DRI_Robustness'
libEGL debug: found extension `DRI_NoError'
libEGL debug: found extension `DRI2_Blob'
libEGL debug: found extension `DRI_TexBuffer'
libEGL debug: found extension `DRI2_Fence'
libEGL info: found extension DRI2_Fence version 2
libEGL debug: found extension `DRI2_Flush'
libEGL debug: found extension `DRI_IMAGE'
libEGL info: found extension DRI_IMAGE version 16
libEGL debug: found extension `DRI_RENDERER_QUERY'
libEGL info: found extension DRI_RENDERER_QUERY version 1
libEGL debug: found extension `DRI_MutableRenderBufferDriver'
libEGL info: found extension DRI_MutableRenderBufferDriver version 1
libEGL debug: found extension `DRI_CONFIG_QUERY'
libEGL info: found extension DRI_CONFIG_QUERY version 1
libEGL debug: found extension `DRI_Robustness'
libEGL info: found extension DRI_Robustness version 1
libEGL debug: found extension `DRI_NoError'
libEGL info: found extension DRI_NoError version 1
libEGL debug: found extension `DRI2_Blob'
libEGL info: found extension DRI2_Blob version 1
libEGL debug: did not find optional extension DRI2_BufferDamage version 1
libEGL debug: did not find optional extension DRI2_Interop version 1
libEGL debug: did not find optional extension DRI_FlushControl version 1
glamor: No eglstream capable devices found
glamor: 'wl_drm' not supported
Missing Wayland requirements for glamor GBM backend
Missing Wayland requirements for glamor EGLStream backend
Failed to initialize glamor, falling back to sw
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/tpg/.drirc: No such file or
directory.
libGL: Can't open configuration file /etc/drirc: No such file or directory.
libGL: Can't open configuration file /home/tpg/.drirc: No such file or
directory.
The XKEYBOARD keymap compiler (xkbcomp) reports:
Warning: Unsupported high keycode 372 for name <I372> ignored
X11 cannot support keycodes above 255.
This warning only shows for the first high keycode.
Errors from xkbcomp are not fatal to the X server
dbus-update-activation-environment: warning: error sending to systemd:
org.freedesktop.DBus.Error.ServiceUnknown: The name
org.freedesktop.systemd1 was not provided by any .service files
libKF5KIOCore.so.5 was not found.
libKF5Parts.so.5 was not found.
libKF5Plasma.so.5 was not found.
kdeinit5: preparing to launch '/usr/lib64/libexec/kf5/klauncher'
kdeinit5: Launched KLauncher, pid = 20907, result = 0
Googling around gives nothing 
No i have to use x11 session.