Comment 4 for bug 1626651

This looks like one keypress would cause a massive spew of uevents and/or evdev events. Can you please run "sudo evtest" and "udevadm monitor -e", then press a brightness key once, then ^C both and copy&paste the output?

I don't get this on my ThinkPad X230, I have the opposite problem (brightness keys not working at all any more with 4.8 due to acpi_video0 disappearing, bug 1626429).