I am having an issue with intel NUC8i7HNK. I have three Dell U2415 monitors connected to one mDP daisychained. When the monitors go to sleep (dpms) trying to wake up the monitors after half hour or more fails, touching the keyboard and mouse. Only way is a hard reboot. Same monitors connected to other systems wake up fine. This system has AMD Vega M graphics but Intel graphics drive the displays. Is this correct?
Reporter, Can you send dmesg from boot with kernel parameters drm.debug=0x1e log_buf_len=4M.
This will give more information about the bug.
Created attachment 141857 [details]
dmesg -drm.debug=0x1e log_buf_len=4M
did dmesg get cut off?
Created attachment 141859 [details]
A couple of traces I found in the logs.
Created attachment 141860 [details]
Since fedora uses journald this might be more complete.
I turned off dpms for now. if you want logs when entering dpms let me know.
Seems to be fixed in kernel 4.18