Keyboard still not working. systemctl status shows some error at the end:
tca8424: readInputReport failed, wrote -1, expected 6: Transpor...107

Edit: Checked status after reboot, didn't see an error. Did systemctl restart. Now status shows a different error: failed to write "67" to /sys/class/gpio/unexport

Edit 2: Another status check: This time again the first error, plus this:
tca8424: reset failed, wrote -1, expected 4: Transport endpoint...(107)