KDE Plasma 5.22 Wayland black screen after logging in

So after hearing that Wayland got some love in KDE 5.22 update i decided to try it out. The issue is that after logging in i get a black screen on both of my monitors and they constantly lose signal and regain it to show only black screen with the mouse sometimes visible. After around 20 seconds it gets me back to the login screen and for whatever reason switches my primary display. I tried starting it it with one display but it was the same but didnt change the primary display since the other one was unplugged. After starting a nested Kwin with wayland (by using the commands shown on KWin/Wayland kde community site) this is what terminal shows me:

No backend specified through command line argument, trying auto resolution

kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5089:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5091:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5093:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5097:47: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5099:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5107:48: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5111:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5113:46: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5117:45: this compose sequence is a duplicate of another; skipping line
kwin_xkbcommon: XKB: /usr/share/X11/locale/en_US.UTF-8/Compose:5120:46: this compose sequence is a duplicate of another; skipping line
kf.globalaccel.kglobalacceld: No desktop file found for service  "org.kde.spectacle.desktop"
kf.globalaccel.kglobalacceld: No desktop file found for service  "org.flameshot.flameshot.desktop"
QImage::scaled: Image is a null image
OpenGL vendor string:                   NVIDIA Corporation
OpenGL renderer string:                 NVIDIA GeForce GTX 1660 Ti/PCIe/SSE2
OpenGL version string:                  OpenGL ES 3.2 NVIDIA 470.42.01
OpenGL shading language version string: OpenGL ES GLSL ES 3.20
Driver:                                 NVIDIA
Driver version:                         470.42.1
GPU class:                              Unknown
OpenGL version:                         3.2
GLSL version:                           3.20
Linux kernel version:                   5.13.2
Requires strict binding:                no
GLSL shaders:                           yes
Texture NPOT support:                   yes
Virtual Machine:                        no
Filter multi-plane format 842093913
Filter multi-plane format 842094158
Filter multi-plane format 825382478
Filter multi-plane format 909203022
Filter multi-plane format 875714126
kf.notifications: env says KDE is running but SNI unavailable -- check KDE_FULL_SESSION and XDG_CURRENT_DESKTOP
kwin_core: Failed to update gamma ramp for output KWin::X11WindowedOutput(0x564711e1b0e0, name="X11-0", geometry=QRect(0,0 1024x768), scale=1)
(WW) Option "-listen" for file descriptors is deprecated
Please use "-listenfd" instead.
(WW) Option "-listen" for file descriptors is deprecated
Please use "-listenfd" instead.
glamor: 'wl_drm' not supported
Missing Wayland requirements for glamor GBM backend
glamor: 'wl_eglstream_controller' not supported
Missing Wayland requirements for glamor EGLStream backend
Failed to initialize glamor, falling back to sw

The XKEYBOARD keymap compiler (xkbcomp) reports:

> Warning:          Could not resolve keysym XF86BrightnessAuto
> Warning:          Could not resolve keysym XF86DisplayOff
> Warning:          Could not resolve keysym XF86Info
> Warning:          Could not resolve keysym XF86AspectRatio
> Warning:          Could not resolve keysym XF86DVD
> Warning:          Could not resolve keysym XF86Audio
> Warning:          Could not resolve keysym XF86ChannelUp
> Warning:          Could not resolve keysym XF86ChannelDown
> Warning:          Could not resolve keysym XF86Break
> Warning:          Could not resolve keysym XF86VideoPhone
> Warning:          Could not resolve keysym XF86ZoomReset
> Warning:          Could not resolve keysym XF86Editor
> Warning:          Could not resolve keysym XF86GraphicsEditor
> Warning:          Could not resolve keysym XF86Presentation
> Warning:          Could not resolve keysym XF86Database
> Warning:          Could not resolve keysym XF86Voicemail
> Warning:          Could not resolve keysym XF86Addressbook
> Warning:          Could not resolve keysym XF86DisplayToggle
> Warning:          Could not resolve keysym XF86SpellCheck
> Warning:          Could not resolve keysym XF86ContextMenu
> Warning:          Could not resolve keysym XF86MediaRepeat
> Warning:          Could not resolve keysym XF8610ChannelsUp
> Warning:          Could not resolve keysym XF8610ChannelsDown
> Warning:          Could not resolve keysym XF86Images
> Warning:          Could not resolve keysym XF86NotificationCenter
> Warning:          Could not resolve keysym XF86PickupPhone
> Warning:          Could not resolve keysym XF86HangupPhone
> Warning:          Could not resolve keysym XF86Fn
> Warning:          Could not resolve keysym XF86Fn_Esc
> Warning:          Could not resolve keysym XF86FnRightShift
> Warning:          Could not resolve keysym XF86Numeric0
> Warning:          Could not resolve keysym XF86Numeric1
> Warning:          Could not resolve keysym XF86Numeric2
> Warning:          Could not resolve keysym XF86Numeric3
> Warning:          Could not resolve keysym XF86Numeric4
> Warning:          Could not resolve keysym XF86Numeric5
> Warning:          Could not resolve keysym XF86Numeric6
> Warning:          Could not resolve keysym XF86Numeric7
> Warning:          Could not resolve keysym XF86Numeric8
> Warning:          Could not resolve keysym XF86Numeric9
> Warning:          Could not resolve keysym XF86NumericStar
> Warning:          Could not resolve keysym XF86NumericPound
> Warning:          Could not resolve keysym XF86NumericA
> Warning:          Could not resolve keysym XF86NumericB
> Warning:          Could not resolve keysym XF86NumericC
> Warning:          Could not resolve keysym XF86NumericD
> Warning:          Could not resolve keysym XF86CameraFocus
> Warning:          Could not resolve keysym XF86WPSButton
> Warning:          Could not resolve keysym XF86CameraZoomIn
> Warning:          Could not resolve keysym XF86CameraZoomOut
> Warning:          Could not resolve keysym XF86CameraUp
> Warning:          Could not resolve keysym XF86CameraDown
> Warning:          Could not resolve keysym XF86CameraLeft
> Warning:          Could not resolve keysym XF86CameraRight
> Warning:          Could not resolve keysym XF86AttendantOn
> Warning:          Could not resolve keysym XF86AttendantOff
> Warning:          Could not resolve keysym XF86AttendantToggle
> Warning:          Could not resolve keysym XF86LightsToggle
> Warning:          Could not resolve keysym XF86ALSToggle
> Warning:          Could not resolve keysym XF86Buttonconfig
> Warning:          Could not resolve keysym XF86Taskmanager
> Warning:          Could not resolve keysym XF86Journal
> Warning:          Could not resolve keysym XF86ControlPanel
> Warning:          Could not resolve keysym XF86AppSelect
> Warning:          Could not resolve keysym XF86Screensaver
> Warning:          Could not resolve keysym XF86VoiceCommand
> Warning:          Could not resolve keysym XF86Assistant
> Warning:          Could not resolve keysym XF86BrightnessMin
> Warning:          Could not resolve keysym XF86BrightnessMax
> Warning:          Could not resolve keysym XF86KbdInputAssistPrev
> Warning:          Could not resolve keysym XF86KbdInputAssistNext
> Warning:          Could not resolve keysym XF86KbdInputAssistPrevgroup
> Warning:          Could not resolve keysym XF86KbdInputAssistNextgroup
> Warning:          Could not resolve keysym XF86KbdInputAssistAccept
> Warning:          Could not resolve keysym XF86KbdInputAssistCancel
> Warning:          Could not resolve keysym XF86RightUp
> Warning:          Could not resolve keysym XF86RightDown
> Warning:          Could not resolve keysym XF86LeftUp
> Warning:          Could not resolve keysym XF86LeftDown
> Warning:          Could not resolve keysym XF86RootMenu
> Warning:          Could not resolve keysym XF86MediaTopMenu
> Warning:          Could not resolve keysym XF86Numeric11
> Warning:          Could not resolve keysym XF86Numeric12
> Warning:          Could not resolve keysym XF86AudioDesc
> Warning:          Could not resolve keysym XF863DMode
> Warning:          Could not resolve keysym XF86NextFavorite
> Warning:          Could not resolve keysym XF86StopRecord
> Warning:          Could not resolve keysym XF86PauseRecord
> Warning:          Could not resolve keysym XF86VOD
> Warning:          Could not resolve keysym XF86Unmute
> Warning:          Could not resolve keysym XF86FastReverse
> Warning:          Could not resolve keysym XF86SlowReverse
> Warning:          Could not resolve keysym XF86Data
> Warning:          Could not resolve keysym XF86OnScreenKeyboard
> Warning:          Could not resolve keysym XF86PrivacyScreenToggle
> Warning:          Could not resolve keysym XF86SelectiveScreenshot
> Warning:          Could not resolve keysym XF86Macro1
> Warning:          Could not resolve keysym XF86Macro2
> Warning:          Could not resolve keysym XF86Macro3
> Warning:          Could not resolve keysym XF86Macro4
> Warning:          Could not resolve keysym XF86Macro5
> Warning:          Could not resolve keysym XF86Macro6
> Warning:          Could not resolve keysym XF86Macro7
> Warning:          Could not resolve keysym XF86Macro8
> Warning:          Could not resolve keysym XF86Macro9
> Warning:          Could not resolve keysym XF86Macro10
> Warning:          Could not resolve keysym XF86Macro11
> Warning:          Could not resolve keysym XF86Macro12
> Warning:          Could not resolve keysym XF86Macro13
> Warning:          Could not resolve keysym XF86Macro14
> Warning:          Could not resolve keysym XF86Macro15
> Warning:          Could not resolve keysym XF86Macro16
> Warning:          Could not resolve keysym XF86Macro17
> Warning:          Could not resolve keysym XF86Macro18
> Warning:          Could not resolve keysym XF86Macro19
> Warning:          Could not resolve keysym XF86Macro20
> Warning:          Could not resolve keysym XF86Macro21
> Warning:          Could not resolve keysym XF86Macro22
> Warning:          Could not resolve keysym XF86Macro23
> Warning:          Could not resolve keysym XF86Macro24
> Warning:          Could not resolve keysym XF86Macro25
> Warning:          Could not resolve keysym XF86Macro26
> Warning:          Could not resolve keysym XF86Macro27
> Warning:          Could not resolve keysym XF86Macro28
> Warning:          Could not resolve keysym XF86Macro29
> Warning:          Could not resolve keysym XF86Macro30
> Warning:          Could not resolve keysym XF86MacroRecordStart
> Warning:          Could not resolve keysym XF86MacroRecordStop
> Warning:          Could not resolve keysym XF86MacroPresetCycle
> Warning:          Could not resolve keysym XF86MacroPreset1
> Warning:          Could not resolve keysym XF86MacroPreset2
> Warning:          Could not resolve keysym XF86MacroPreset3
> Warning:          Could not resolve keysym XF86KbdLcdMenu1
> Warning:          Could not resolve keysym XF86KbdLcdMenu2
> Warning:          Could not resolve keysym XF86KbdLcdMenu3
> Warning:          Could not resolve keysym XF86KbdLcdMenu4
> Warning:          Could not resolve keysym XF86KbdLcdMenu5
Errors from xkbcomp are not fatal to the X server
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Unsupported maximum keycode 708, clipping.
>                   X11 cannot support keycodes above 255.
> Warning:          Could not resolve keysym XF86BrightnessAuto
> Warning:          Could not resolve keysym XF86DisplayOff
> Warning:          Could not resolve keysym XF86Info
> Warning:          Could not resolve keysym XF86AspectRatio
> Warning:          Could not resolve keysym XF86DVD
> Warning:          Could not resolve keysym XF86Audio
> Warning:          Could not resolve keysym XF86ChannelUp
> Warning:          Could not resolve keysym XF86ChannelDown
> Warning:          Could not resolve keysym XF86Break
> Warning:          Could not resolve keysym XF86VideoPhone
> Warning:          Could not resolve keysym XF86ZoomReset
> Warning:          Could not resolve keysym XF86Editor
> Warning:          Could not resolve keysym XF86GraphicsEditor
> Warning:          Could not resolve keysym XF86Presentation
> Warning:          Could not resolve keysym XF86Database
> Warning:          Could not resolve keysym XF86Voicemail
> Warning:          Could not resolve keysym XF86Addressbook
> Warning:          Could not resolve keysym XF86DisplayToggle
> Warning:          Could not resolve keysym XF86SpellCheck
> Warning:          Could not resolve keysym XF86ContextMenu
> Warning:          Could not resolve keysym XF86MediaRepeat
> Warning:          Could not resolve keysym XF8610ChannelsUp
> Warning:          Could not resolve keysym XF8610ChannelsDown
> Warning:          Could not resolve keysym XF86Images
> Warning:          Could not resolve keysym XF86NotificationCenter
> Warning:          Could not resolve keysym XF86PickupPhone
> Warning:          Could not resolve keysym XF86HangupPhone
> Warning:          Could not resolve keysym XF86Fn
> Warning:          Could not resolve keysym XF86Fn_Esc
> Warning:          Could not resolve keysym XF86FnRightShift
> Warning:          Could not resolve keysym XF86Numeric0
> Warning:          Could not resolve keysym XF86Numeric1
> Warning:          Could not resolve keysym XF86Numeric2
> Warning:          Could not resolve keysym XF86Numeric3
> Warning:          Could not resolve keysym XF86Numeric4
> Warning:          Could not resolve keysym XF86Numeric5
> Warning:          Could not resolve keysym XF86Numeric6
> Warning:          Could not resolve keysym XF86Numeric7
> Warning:          Could not resolve keysym XF86Numeric8
> Warning:          Could not resolve keysym XF86Numeric9
> Warning:          Could not resolve keysym XF86NumericStar
> Warning:          Could not resolve keysym XF86NumericPound
> Warning:          Could not resolve keysym XF86NumericA
> Warning:          Could not resolve keysym XF86NumericB
> Warning:          Could not resolve keysym XF86NumericC
> Warning:          Could not resolve keysym XF86NumericD
> Warning:          Could not resolve keysym XF86CameraFocus
> Warning:          Could not resolve keysym XF86WPSButton
> Warning:          Could not resolve keysym XF86CameraZoomIn
> Warning:          Could not resolve keysym XF86CameraZoomOut
> Warning:          Could not resolve keysym XF86CameraUp
> Warning:          Could not resolve keysym XF86CameraDown
> Warning:          Could not resolve keysym XF86CameraLeft
> Warning:          Could not resolve keysym XF86CameraRight
> Warning:          Could not resolve keysym XF86AttendantOn
> Warning:          Could not resolve keysym XF86AttendantOff
> Warning:          Could not resolve keysym XF86AttendantToggle
> Warning:          Could not resolve keysym XF86LightsToggle
> Warning:          Could not resolve keysym XF86ALSToggle
> Warning:          Could not resolve keysym XF86Buttonconfig
> Warning:          Could not resolve keysym XF86Taskmanager
> Warning:          Could not resolve keysym XF86Journal
> Warning:          Could not resolve keysym XF86ControlPanel
> Warning:          Could not resolve keysym XF86AppSelect
> Warning:          Could not resolve keysym XF86Screensaver
> Warning:          Could not resolve keysym XF86VoiceCommand
> Warning:          Could not resolve keysym XF86Assistant
> Warning:          Could not resolve keysym XF86BrightnessMin
> Warning:          Could not resolve keysym XF86BrightnessMax
> Warning:          Could not resolve keysym XF86KbdInputAssistPrev
> Warning:          Could not resolve keysym XF86KbdInputAssistNext
> Warning:          Could not resolve keysym XF86KbdInputAssistPrevgroup
> Warning:          Could not resolve keysym XF86KbdInputAssistNextgroup
> Warning:          Could not resolve keysym XF86KbdInputAssistAccept
> Warning:          Could not resolve keysym XF86KbdInputAssistCancel
> Warning:          Could not resolve keysym XF86RightUp
> Warning:          Could not resolve keysym XF86RightDown
> Warning:          Could not resolve keysym XF86LeftUp
> Warning:          Could not resolve keysym XF86LeftDown
> Warning:          Could not resolve keysym XF86RootMenu
> Warning:          Could not resolve keysym XF86MediaTopMenu
> Warning:          Could not resolve keysym XF86Numeric11
> Warning:          Could not resolve keysym XF86Numeric12
> Warning:          Could not resolve keysym XF86AudioDesc
> Warning:          Could not resolve keysym XF863DMode
> Warning:          Could not resolve keysym XF86NextFavorite
> Warning:          Could not resolve keysym XF86StopRecord
> Warning:          Could not resolve keysym XF86PauseRecord
> Warning:          Could not resolve keysym XF86VOD
> Warning:          Could not resolve keysym XF86Unmute
> Warning:          Could not resolve keysym XF86FastReverse
> Warning:          Could not resolve keysym XF86SlowReverse
> Warning:          Could not resolve keysym XF86Data
> Warning:          Could not resolve keysym XF86OnScreenKeyboard
> Warning:          Could not resolve keysym XF86PrivacyScreenToggle
> Warning:          Could not resolve keysym XF86SelectiveScreenshot
> Warning:          Could not resolve keysym XF86Macro1
> Warning:          Could not resolve keysym XF86Macro2
> Warning:          Could not resolve keysym XF86Macro3
> Warning:          Could not resolve keysym XF86Macro4
> Warning:          Could not resolve keysym XF86Macro5
> Warning:          Could not resolve keysym XF86Macro6
> Warning:          Could not resolve keysym XF86Macro7
> Warning:          Could not resolve keysym XF86Macro8
> Warning:          Could not resolve keysym XF86Macro9
> Warning:          Could not resolve keysym XF86Macro10
> Warning:          Could not resolve keysym XF86Macro11
> Warning:          Could not resolve keysym XF86Macro12
> Warning:          Could not resolve keysym XF86Macro13
> Warning:          Could not resolve keysym XF86Macro14
> Warning:          Could not resolve keysym XF86Macro15
> Warning:          Could not resolve keysym XF86Macro16
> Warning:          Could not resolve keysym XF86Macro17
> Warning:          Could not resolve keysym XF86Macro18
> Warning:          Could not resolve keysym XF86Macro19
> Warning:          Could not resolve keysym XF86Macro20
> Warning:          Could not resolve keysym XF86Macro21
> Warning:          Could not resolve keysym XF86Macro22
> Warning:          Could not resolve keysym XF86Macro23
> Warning:          Could not resolve keysym XF86Macro24
> Warning:          Could not resolve keysym XF86Macro25
> Warning:          Could not resolve keysym XF86Macro26
> Warning:          Could not resolve keysym XF86Macro27
> Warning:          Could not resolve keysym XF86Macro28
> Warning:          Could not resolve keysym XF86Macro29
> Warning:          Could not resolve keysym XF86Macro30
> Warning:          Could not resolve keysym XF86MacroRecordStart
> Warning:          Could not resolve keysym XF86MacroRecordStop
> Warning:          Could not resolve keysym XF86MacroPresetCycle
> Warning:          Could not resolve keysym XF86MacroPreset1
> Warning:          Could not resolve keysym XF86MacroPreset2
> Warning:          Could not resolve keysym XF86MacroPreset3
> Warning:          Could not resolve keysym XF86KbdLcdMenu1
> Warning:          Could not resolve keysym XF86KbdLcdMenu2
> Warning:          Could not resolve keysym XF86KbdLcdMenu3
> Warning:          Could not resolve keysym XF86KbdLcdMenu4
> Warning:          Could not resolve keysym XF86KbdLcdMenu5

I should mention that on my previous install of manjaro few months ago i managed to start wayland session without any real issues.
Anybody know any solution?

Hi @animdude

Wayland support in KDE is still being worked on. Some changes might introduce new bugs. Nate reported some improvements in the DRM code in his blog yesterday

A few more details about this are here (very technical)

Some of the changes might improve problems with your monitors and will be backported to Plasma 5.22, but are not currently in Manjaro stable. If your problems persist after the next plasma release is pushed to stable, it might be worthwhile to report a bug at https://bugs.kde.org/
I don’t think it is likely that someone from the Manjaro side will analyse this problem. Thus your chances of getting this looked at and fixed are much better upstream @ KDE.