I posted in the other forum but as of yet have had no reply so thought I would try here as well :-

I am keen to run wayland so I can help out with bug reports etc but at the moment for I am finding its not running well. I have three machines all running Neon fully update. Since version 5.11.0 I have noticed maybe a regression in wayland. On all three machines (All intel with onboard intel graphics) any application I open causes the taskbar panel to close and reopen (its very repeatable) but there is no crash detected so I do not know how to send in a bug report. One of the machines I have (HP elitebook 850 G1) has two screens connected, any application I open disappears off both the screens so I cannot use it at all. Please advise anything I can do to help in this situation esp since there seems to be a push to get this ready by 5.12.

I did find these couple of things in syslog :-

Oct 20 20:55:31 nathan-ThinkPad-Helix org.kde.kuiserver[1668]: QObject::connect: invalid null parameter

Oct 20 21:07:23 nathan-ThinkPad-Helix kernel: [ 773.703267] QSGRenderThread[3041]: segfault at 18 ip 00007f6a4f5b6b60 sp 00007f697c8e7950 error 4 in libwayland-client.so.0.3.0[7f6a4f5b0000+c000]

And this after opening KInfocentre under wayland -------------------------------------------------------------------------------------------------------------------------------------

Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: kuiserver: cannot connect to X server
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: unnamed app(16173): Communication problem with "kuiserver" , it probably crashed.
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message recipient disconnected from message bus without replying" "
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: kuiserver: cannot connect to X server
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: unnamed app(16176): Communication problem with "kuiserver" , it probably crashed.
Oct 25 16:24:40 nathan-OptiPlex-790 org.kde.kuiserver[15836]: Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message recipient disconnected from message bus without replying" "

this time lost the whole desktop, managed to grab this before rebooting :-------------------------------------------------------------------------------------------------------------

Oct 25 16:30:07 nathan-OptiPlex-790 kernel: [ 2416.749607] konsole[16143]: segfault at 3bc ip 00007f316c3ad5b9 sp 00007ffe89e0a4b0 error 6 in libwayland-client.so.0.3.0[7f316c3a4000+c000]
Oct 25 16:30:40 nathan-OptiPlex-790 org.kde.kdeconnect[15836]: QCoreApplication::postEvent: Unexpected null receiver
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: kuiserver: cannot connect to X server
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: unnamed app(16625): Communication problem with "kuiserver" , it probably crashed.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message recipient disconnected from message bus without replying" "
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: kuiserver: cannot connect to X server
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: unnamed app(16628): Communication problem with "kuiserver" , it probably crashed.
Oct 25 16:30:46 nathan-OptiPlex-790 org.kde.kuiserver[15836]: Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message recipient disconnected from message bus without replying" "
Oct 25 16:30:47 nathan-OptiPlex-790 packagekitd[1718]: Starting pkgProblemResolver with broken count: 0
Oct 25 16:30:47 nathan-OptiPlex-790 packagekitd[1718]: Starting 2 pkgProblemResolver with broken count: 0
Oct 25 16:30:47 nathan-OptiPlex-790 packagekitd[1718]: Done
Oct 25 16:30:48 nathan-OptiPlex-790 PackageKit: get-updates transaction /3181_cdccaaad from uid 1000 finished with success after 478ms
Oct 25 16:30:48 nathan-OptiPlex-790 packagekitd[1718]: Starting pkgProblemResolver with broken count: 0
Oct 25 16:30:48 nathan-OptiPlex-790 packagekitd[1718]: Starting 2 pkgProblemResolver with broken count: 0
Oct 25 16:30:48 nathan-OptiPlex-790 packagekitd[1718]: Done
Oct 25 16:30:48 nathan-OptiPlex-790 PackageKit: get-updates transaction /3182_eddcbaed from uid 1000 finished with success after 473ms
Oct 25 16:30:52 nathan-OptiPlex-790 kernel: [ 2461.654221] QSGRenderThread[16642]: segfault at 18 ip 00007f02c40c8b60 sp 00007f01f669b950 error 4 in libwayland-client.so.0.3.0[7f02c40c2000+c000]

I can't even start Wayland session with 5.12. Wayland client segfaults with amdgpu for me.