Hot unplug display

Hi,

I'm trying to handle hot unplug of a display properly.

I hooked up a udev rule that fires on plug/unplug that is initially working fine. However after the first unplug that is handled, udev stops generating drm events. This makes me think I didn't close / free something when handling the unplug.

That is on Intel Gen 11 integrated graphics. Some code works fine on AMD Ryzen.

thx