Laptop keyboard stops working at login screen

Starting from login screen and after signin any key presses doesn’t have any effects(except Fn+BrighnesstUp/Down). I’m using crypted partion and can type password at loading so keyboard isn’t broken.
libinput debug-events doesn’t show anything except those brightness keys.

Appreciate any help.

Can’t print here xinput list and inxi -Fxxxza --no-host, because forum said I can’t post any link(but there is no link in output!) so this is output pastebin.com/2UcHWHPS

Is it after update or it is clean install ?

I’ve installed latest KDE version month ago on new laptop. Of cause I’ve got few updates.
Just now after reboot all worked well and after 10 minutes keys was swapped randomly(F12 as Super+D) even on remote keyword and on laptop keyboard too.
p.s. Pressing on right Ctrl fixed last issue xD

I had similar problem with Dell laptop, but it was a BIOS bug, and in this case keyboard was working only with some kernel versions. Try change to older kernel and look at journalctl -p3 -xb to see if there is something.

-- Journal begins at Wed 2020-12-02 01:27:00 MSK, ends at Sun 2021-01-10 20:51:06 MSK. --
янв 10 20:49:37 kein-xps kernel: psmouse serio1: elantech: elantech_send_cmd query 0x02 failed.
янв 10 20:49:37 kein-xps kernel: psmouse serio1: elantech: failed to query capabilities.
янв 10 20:49:37 kein-xps systemd-udevd[348]: /usr/lib/udev/rules.d/60-libfprint-2-tod1-goodix.rules:2 Unknown group 'plugdev', ignoring
янв 10 20:49:37 kein-xps systemd-udevd[348]: /usr/lib/udev/rules.d/60-libfprint-2-tod1-goodix.rules:4 Unknown group 'plugdev', ignoring
янв 10 20:49:37 kein-xps systemd-udevd[348]: /usr/lib/udev/rules.d/60-libfprint-2-tod1-goodix.rules:6 Unknown group 'plugdev', ignoring
янв 10 20:49:37 kein-xps systemd-udevd[348]: /usr/lib/udev/rules.d/60-libfprint-2-tod1-goodix.rules:8 Unknown group 'plugdev', ignoring
янв 10 20:49:39 kein-xps wpa_supplicant[1128]: nl80211: kernel reports: Attribute failed policy validation
янв 10 20:49:39 kein-xps wpa_supplicant[1128]: Failed to create interface p2p-dev-wlp0s20f3: -22 (Invalid argument)
янв 10 20:49:39 kein-xps wpa_supplicant[1128]: nl80211: Failed to create a P2P Device interface p2p-dev-wlp0s20f3
янв 10 20:49:50 kein-xps systemd-coredump[2221]: Process 1424 (baloo_file) of user 1000 dumped core.

Stack trace of thread 1663:
#0  0x00007f50978cd396 n/a (liblmdb.so + 0x4396)
#1  0x00007f50978cfefe n/a (liblmdb.so + 0x6efe)
#2  0x00007f50978d0644 n/a (liblmdb.so + 0x7644)
#3  0x00007f50978d0c50 mdb_get (liblmdb.so + 0x7c50)
#4  0x00007f5098da72a5 _ZN5Baloo12IdFilenameDB3getEy (libKF5BalooEngine.so.5 + 0x152a5)
#5  0x00007f5098da12fc _ZNK5Baloo13DocumentUrlDB3getEy (libKF5BalooEngine.so.5 + 0xf2fc)
#6  0x00007f5098db2085 _ZNK5Baloo11Transaction11documentUrlEy (libKF5BalooEngine.so.5 + 0x20085)
#7  0x000055ede55228e4 n/a (baloo_file + 0x1d8e4)
#8  0x00007f5098db94ff _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x274ff)
#9  0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#10 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#11 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#12 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#13 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#14 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#15 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#16 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#17 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#18 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#19 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#20 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#21 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#22 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#23 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#24 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#25 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#26 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#27 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)
#28 0x00007f5098db9557 _ZN5Baloo16WriteTransaction17removeRecursivelyEyRKSt8functionIFbyEE (libKF5BalooEngine.so.5 + 0x27557)

Looks like problems only with a fingerprint sensor.
Problem doesn’t appear now. I’ve switched at reboot to LTS kernel. And after that reboot to 5.10 kernel. And now all works good.

I hate problems lake that because I know, that it isn’t really fixed.

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