[Bug 99334] [SKL] External screen not recognized on boot, disconnects during operation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99334

--- Comment #8 from post+fdo at ralfj.de ---
> If I use HDMI through the Thunderbolt port, there seems to be no problem.

I may have been a little over-optimistic here; while one adapter (from Apple)
works fine, I am having huge trouble with a USB-C docking station from Dell. 
About one in ten times, when I connect it, the entire machine just freezes and
I have to hard-reboot. Frequently, not even SysRq keys will react.

Also, it occasionally (like twice a week) happens that an HDMI screen is not
recognized even if I re-plug it 10 times.  In this case I have to reboot to get
it to connect.

Essentially, I now find myself rebooting the laptop 3 or 4 times as week
because of issues with the external screen. It's like the 90s all over again...

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