After upgrading to kernel 5.14.7-198, my laptop failed to boot: after entering my LUKS password, it just had a black screen. Selecting kernel 5.13.12-193 (the previous kernel) works.
I was able to see a panic by booting the new kernel without the options "quiet" and "splash", while also adding "nomodeset". Here is a picture::
This is on a Lenovo ThinkPad E15 Gen2. Possibly relevant dmesg output about the touchpad (from the 5.13 kernel):
[ 8.223509] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x6f3001) [ 8.236239] psmouse serio1: elantech: Synaptics capabilities query result 0x90, 0x18, 0x10. [ 8.249377] psmouse serio1: elantech: Elan sample query result 00, 0e, a7 [ 8.264356] psmouse serio1: elantech: Elan ic body: 0x11, current fw version: 0x4 [ 8.340592] psmouse serio1: elantech: Trying to set up SMBus access [ 8.340635] psmouse serio1: elantech: SMbus companion is not ready yet [ 8.368502] input: ETPS/2 Elantech TrackPoint as /devices/platform/i8042/serio1/input/input17 [ 8.383642] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input9