Kwin crashes

[joneall]

Yesterday, Kwin crashed on me once and this morning it crashed just after I logged on. It looked in the log like there might be a memory problem:

2026-03-19
T08:08:35.487274+01:00 jon-desktop kernel: total RAM covered: 16302M
2026-03-19T08:08:35.487275+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 64K num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487275+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 128K num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487276+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 256K num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487276+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 512K num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487277+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 1M num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487278+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 2M num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487279+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 4M num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487279+01:00 jon-desktop kernel: gran_size: 64K chunk_size: 8M num_reg: 10 lose cover RAM: 118M
2026-03-19T08:08:35.487280+01:00 jon-desktop kernel: *BAD*gran_size: 64K chunk_size: 16M num_reg: 10 lose cover RAM: -8M
2026-03-19T08:08:35.487280+01:00 jon-desktop kernel: *BAD*gran_size: 64K chunk_size: 32M num_reg: 10 lose cover RAM: -8M

But I ran a memtest (Passmark memtest 96 V8.4) for a good half hour and it found nothing. Btw, it seems to me there are far more entries in syslog than before. The above log entries seem to be from before I logged in.

Later on, there area bunch of messages like this:

2026-03-19T08:09:49.968409+01:00 jon-desktop systemd[2065]: message repeated 15 times: [ drkonqi-coredump-launcher.socket - Socket to launch DrKonqi for a systemd-coredump crash was skippe
d because of an unmet condition check (ConditionUser=!@system).]

This would seem to indicate my logon:

2026-03-19T08:10:23.670666+01:00 jon-desktop sddm[2044]: Authentication for user "jon" successful

This looks odd, but shoudn't cause a crash:

2026-03-19T08:10:30.381702+01:00 jon-desktop org.kde.powerdevil.discretegpuhelper: Detected locale "C" with character encoding "ANSI_X3.4-1968", which is not UTF-8.#012Qt depends on a UTF-
8 locale, and has switched to "C.UTF-8" instead.#012If this causes problems, reconfigure your locale. See the locale(1) manual#012for more information.

Here is my locale:

$ locale
LANG=en_US.UTF-8
LANGUAGE=en_US
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=fr_FR.UTF-8
LC_TIME=fr_FR.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=fr_FR.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=fr_FR.UTF-8
LC_NAME=fr_FR.UTF-8
LC_ADDRESS=fr_FR.UTF-8
LC_TELEPHONE=fr_FR.UTF-8
LC_MEASUREMENT=fr_FR.UTF-8
LC_IDENTIFICATION=fr_FR.UTF-8
LC_ALL=

Then

2026-03-19T08:10:34.363864+01:00 jon-desktop kdeconnectd[2696]: The Wayland connection broke. Did the Wayland compositor die?
2026-03-19T08:10:34.375115+01:00 jon-desktop kdeconnectd[2696]: Attempting wayland reconnect
2026-03-19T08:10:34.375354+01:00 jon-desktop kwin_wayland_wrapper[2344]: (EE) failed to read Wayland events: Broken pipe
...
2026-03-19T08:10:35.780006+01:00 jon-desktop kwin_wayland_wrapper[2994]: The XKEYBOARD keymap compiler (xkbcomp) reports:
2026-03-19T08:10:35.781401+01:00 jon-desktop kwin_wayland_wrapper[2994]: > Warning: Unsupported maximum keycode 708, clipping.
2026-03-19T08:10:35.781422+01:00 jon-desktop kwin_wayland_wrapper[2994]: > X11 cannot support keycodes above 255.
2026-03-19T08:10:35.781492+01:00 jon-desktop kwin_wayland_wrapper[2994]: > Warning: Could not resolve keysym XF86CameraAccessEnable

Obviously, I am lost here.