Comment # 11 on bug 914184 from Egbert Eich

(In reply to Ulrich Windl from comment #8)
> Created attachment 665326 [details]
> Output of "journalctl -k -b |grep drm" (compressed)
> 
> I was not able to reproduce an EDID checksum error with kernel
> 3.16.7-29-desktop and xorg-x11-server-7.6_1.16.1-31.1.x86_64 within a short
> time; However I saw the error two days ago. Maybe the system has to go to a
> deeper sleep to make the problem appear...

This information doesn't help us much as we don't know the version numbers of
the Xserver / kernel you did observe this problem.
I'm also not sure if this isn't a problem on the HW side as we have not seen
EDID issues with Intel for over 2 years.
I'd suggest you use a kernel/Xserver/driver & software combination which seems
to have a great chance to get this problem and instead exchange all HW
components after the graphics card to see if the issue persists.