Keyboard, "stops working" does not take input

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Hi list,

My thinkpad T440s is acting up sometimes in a fashion that I cannot
reliably reproduce. The builtin keyboard stops taking input, as if it
was unplugged. This happens just as I am typing something. The
keyboard does however react to keypresses since I can get the LED on
the mute button (F1) and the function button light up (derailing:
although, the sound is not muted but that might be because of my
combination of Fedora and i3 that requires me to "bindsym
XF86AudioMute exec --no-startup-id amixer set Master toggle" in i3's
config).

I'm a noob when it comes to hardware so feel free to ask me for more
information and I will provide it. For now, this is some journalctl
output from around the time of my experience:

Feb 17 12:06:39 moon kernel: thinkpad_acpi: unhandled HKEY event 0x6060
Feb 17 12:06:39 moon kernel: thinkpad_acpi: please report the
conditions when this event happened to
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
Feb 17 12:06:39 moon kernel: thinkpad_acpi: unknown possible thermal
alarm or keyboard event received
Feb 17 12:06:39 moon kernel: thinkpad_acpi: unhandled HKEY event 0x6060
Feb 17 12:06:39 moon kernel: thinkpad_acpi: please report the
conditions when this event happened to
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
Feb 17 12:06:42 moon kernel: thinkpad_acpi: unknown possible thermal
alarm or keyboard event received
Feb 17 12:06:42 moon kernel: thinkpad_acpi: unhandled HKEY event 0x6060
Feb 17 12:06:42 moon kernel: thinkpad_acpi: please report the
conditions when this event happened to
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
Feb 17 12:06:45 moon kernel: thinkpad_acpi: unknown possible thermal
alarm or keyboard event received
Feb 17 12:06:45 moon kernel: thinkpad_acpi: unhandled HKEY event 0x6060
Feb 17 12:06:45 moon kernel: thinkpad_acpi: please report the
conditions when this event happened to
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx

This has happened about 3 or 4 times this year and all I've done is
rebooting and everything turned out fine after boot.

Cheers,
Carl

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