it takes about 10 seconds from "the system does not react anymore" to "caps lock led blinks". With the help of logging I found out that the step `xrandr --output eDP1 --primary --auto --output DP1-1 --auto --left-of eDP1` might be the problem, not the line before switching external ones off. 4.4.27-2.1 can not reproduce the problem, supporting H1.1 ACCEPT H1 REJECT H2 REJECT H3