cMP resolution change after wake


when 5,1 puts monitor sleep... after wake, resolution changes , can't change normal setting. appears off centered. have restart machine go normal. using old lg l246wp. otherwise, have disable sleep setting. zapping pram not solve issue.

thoughts?
--- post merged, feb 17, 2016 ---
i switched out cables/connections. originally, have dvi-hdmi cable. did shutdown , used display port-hdmi. did not resolve issue.

??
 

i changed monitors , resolved it. looks lg not liking mac pro. oh, well.
 


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