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For those who, for whatever reason, don't want to take the hotplug route, it is still possible to not poll within a script using inotifywait: #!/bin/bash SCREEN_LEFT=DP2 SCREEN_RIGHT=eDP1 START_DELAY=5 renice +19 $$ >/dev/null sleep $START_DELAY OLD_DUAL="dummy" while [ 1 ]; do DUAL=$(cat /sys/class/drm/card0-DP-2/status) if [ "$OLD_DUAL" != ...


I had this problem, and it had nothing to do with xfce or debian, but of problem with radeon driver, I didn't have some firmware, so I did this : dpkg -i firmware-linux-nonfree_0.43_all.deb Find the firmware here or here:


The issue also persists when it is hooked up to different computers, also a Windows 7 machine. It is a hardware defect, I bought a new display a while ago.

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