Invisible wire frame

[tkbd]

Thank you for useful infomation,
I understood that the problem doesn't limit in specific OS and by more complex mechanism...
It might be necessary that a setting of relative offset adjustment of each display elements
( hilight -- selection -- edge(wire frame) -- solid ).

Preference > Misc > Workaround >Edge Offset
This feature seems to adjust an offset in the selection area.
There are some tests by my environment(see follow a screenshot).


An edge display offset ,It's interesting that an the offset is affected in Face Selection.

We thought the same too. That's why [b]dgud[b] added the option to change that in the [/i]Preferences->Misc->Edges display problems?[/i]. But there the minor values is 1.0.

I played with many values and no one worked for the Intel graphic I have. So I changed my approach and got some good result, but not really a fix (left is regular render and right with the "fix" applied):

The are more details in this post.

I tested your code in a PC (i5) with a Intel HD Graphics and still have "my" edge problem:
but for these mother Intel graphic card it goes away just by changing the camera view/zoom a little.
I'm going to try it in a old PC with XP and Intel. But, it seems that this problem related to Intel has no way to be completely fixed - even if we can find a solution it's not applicable to all PC platform.