I’m running KDE on RPI 5, using Wayland.
I have an issue which only occurs when using 2 screens. (It does not happen when I only use one screen and appears only with KDE - I tried with xfce and could not reproduce it).
The screen freezes as I move the cursor slowly from the right to the left screen just before it gets to left edge of the right screen, particularly when I click the mouse. This does not happen all the time, but I can usually reproduce within a minute or so. The following appears in the log:
Nov 13 13:02:10 jonshome kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000014
Nov 13 13:02:10 jonshome kernel: Mem abort info:
Nov 13 13:02:10 jonshome kernel: ESR = 0x0000000096000004
Nov 13 13:02:10 jonshome kernel: EC = 0x25: DABT (current EL), IL = 32 bits
Nov 13 13:02:10 jonshome kernel: SET = 0, FnV = 0
Nov 13 13:02:10 jonshome kernel: EA = 0, S1PTW = 0
Nov 13 13:02:10 jonshome kernel: FSC = 0x04: level 0 translation fault
Nov 13 13:02:10 jonshome kernel: Data abort info:
Nov 13 13:02:10 jonshome kernel: ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
Nov 13 13:02:10 jonshome kernel: CM = 0, WnR = 0, TnD = 0, TagAccess = 0
Nov 13 13:02:10 jonshome kernel: GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
Nov 13 13:02:10 jonshome kernel: user pgtable: 16k pages, 48-bit VAs, pgdp=0000000104f58890
Nov 13 13:02:10 jonshome kernel: [0000000000000014] pgd=0000000000000000, p4d=0000000000000000
Nov 13 13:02:10 jonshome kernel: Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
The journal entries continue after this, but the screen is frozen and I am not able to free it up.
This also occurs with the “Dev 20241014” KDE image before I switch to the testing branch.
Even when the freeze does not happen, there is an unusual occurence which I don’t see in other systems. As I move the cursor towards the left edge of the right screen, the cursor does not move smoothly across to the left screen, but “sticks” for a short while on the right screen before jumping to the left screen. Maybe this is related to the problem.