It is possible udev rules are broken. You might be able to identify source of this power button events by checking keyboard scancode (with evtest) and/or workaround this by removing the power button assignment or assigning it to something else
== get scancode == * run "sudo apt install evtes" * run "evtest" and select your keyboard * try to duplicate your issue * identify the trigger of the power button == Modify keymap == * cd /lib/udev/hwdb.d/ * edit keymap file (60-keyboard.hwdb) * add a change, ex KEYBOARD_KEY_81=f20 # mic mute * run "sudo udevadm hwdb --update" * reboot There are some online examples for modifying hwdb files such as https://askubuntu.com/questions/499252/my-custom-udev-hwdb-rule-doesnt-work -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1926527 Title: "Power off" dialog appears when any three keyboard keys are pressed quickly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926527/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs