I decided to install Nvidia driver and, while I borked the install, blacklisting nouveau seemed to fix VNC. I will retest again just to be certain, but thought of asking here first. <div class="gmail_quote">Em 15/03/2016 19:06, "Ilia Mirkin" <<a href="mailto:imirkin@alum.mit.edu">imirkin@alum.mit.edu</a>> escreveu: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On an optimus system, the display is normally driven by the intel GPU. What makes you suspect nouveau is involved at all? On Tue, Mar 15, 2016 at 3:02 PM, Pedro Francisco <<a href="mailto:pedrogfrancisco@gmail.com">pedrogfrancisco@gmail.com</a>> wrote: > Hello! > I'm investigating a case where x11vnc (or RealVNC server or vino) on a > _real_ X11 server seems to be broken with any VNC viewer. > > By broken I mean: it seems to keep old frames in memory, in such a way > that in every three frames, two are from the past and one is the > current one. > > This is easily spotted when using gnome-shell and looking at the clock > at the top. Besides being 'old', the pictures are "pixel-perfect" and > not corrupted in any way. > > > So, here am I trying to debug it. > Do you have anything to suggest I check before re-running the test? > (namely, blacklisting nouveau and rebuilding initramfs and check if > the problem is gone). > > > P.S.: virtual VNC servers are _not_ broken. > > Thanks in Advance, > Pedro > _______________________________________________ > Nouveau mailing list > <a href="mailto:Nouveau@lists.freedesktop.org">Nouveau@lists.freedesktop.org</a> > <a href="https://lists.freedesktop.org/mailman/listinfo/nouveau" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/nouveau</a> </blockquote></div>