displayport suspend not working correctly

[Marcel <mlautenb@gmail.com>]

Hi all,

I run on Debian testing. I have an Intel NUC with one monitor attached 
via hdmi and the other via displayport. When those monitors should go 
into suspend mode, the one attached to the (mini) display port wakes up 
after about 30 seconds to directly go back into suspend mode. This goes 
on and on, until the monitor cannot even be turned off with its power 
button.

I do not see these effects on the other monitor attached via hdmi nor 
when I attach the one connected via displayport to a computer running 
windows. Any ideas what might be the cause? Or how I could at least 
"debug" it?

Any advice is greatly appreciated ;-)

Thanks for any help

Marcel

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