On Thu, Mar 24, 2016 at 11:18:01AM +0000, xorg-requ...@lists.x.org wrote: > Date: Thu, 24 Mar 2016 12:12:34 +0100 > From: martin f krafft <madd...@madduck.net> > There is something very weird going on, which you may witness in the > video downloadable here: > http://scratch.madduck.net/xorg-display-flicker.mp4 (8Mb) > > The left-most display (DP0) keeps turning off and on (or resets > itself), and generally, it flickers and the pixels jiggle around. > The other two displays are perfectly fine. The monitor on DP1 is of > exactly the same make as that on DP0.
While it wasn't explicitly written, let me just assume that you did try actively connector/cable-swapping those "exactly the same make" monitors, with identical results. > Do you have any idea what might be going on? Why would the left-most > display of three, all connected to the same card, act up, while the > other two are just fine and stable? Perhaps unthinkable, but the connectors of the card might be implemented / wired up asymmetrically, e.g. due to an ickily varying length of traces, or EMI issues. (more esoteric option:) Try swapping plug (thus, wires) of power cord - there are cases known where having the live wire of the cord be the *other* one will avoid/reduce EMI issues. Another idea might be relocating completely i.e. re-constructing the whole test set at a sufficiently/entirely different location, to see whether there is a weird location dependence. So, I guess the actions I mentioned mainly serve to figure out the separation of whether it is a setup-/environment-related weirdness, or whether it is a driver implementation/configuration issue in fact. HTH, Andreas Mohr _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s