<div dir="ltr"><div><div><div>Hi Mikhail, </div>It's hard to tell exactly what is wrong - if you attach both .Xauthority files it will be easier to see the difference. </div>Check what version of Xorg you are running and check it is actually enabling TCP connections - there was a behaviour change in X [1]. </div>--Robert <div> [1] <a href="https://launchpad.net/bugs/1449282">https://launchpad.net/bugs/1449282</a> </div></div> <div class="gmail_quote"><div dir="ltr">On Fri, 30 Oct 2015 at 16:45 Mikhail Morfikov <<a href="mailto:mmorfikov@gmail.com">mmorfikov@gmail.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">When I start an X-session via startx on my debian distro, I can get the output of the two following commands: $ xauth extract - $DISPLAY morfikownia0MIT-MAGIC-COOKIE-1’E!ö½o`q!SD„% $ xauth extract - morfikownia.mhouse.lh:0.0 À¨–0MIT-MAGIC-COOKIE-1Ê¹2y0ºˆ% I know that the output is a little unreadable, but the most important thing is that I get the output from the two commands above. When I send that cookie to another machine using this command: $ xauth extract - morfikownia.mhouse.lh:0.0 | ssh -x <a href="mailto:morfik@192.168.10.20" target="_blank">morfik@192.168.10.20</a> xauth merge - I can get access to this X-server from that machine, and everything works as expected. When I start am X-session via LightDM, the command: xauth extract - morfikownia.mhouse.lh:0.0 returns nothing, or actually it gives me the following message: "No matches found, authority file "-" not written" I can, of course, use the following command to get the cookie: xauth extract - $DISPLAY and then send it via: $ xauth extract - $DISPLAY | ssh -x <a href="mailto:morfik@192.168.10.20" target="_blank">morfik@192.168.10.20</a> xauth merge - But in that case, when I try to connect remotely to this X-server, I'm unable to do it. I get a message that "no protocol specified", and nothing happens. I think I have the exact same options set in both cases, i.e. in the /etc/X11/xinit/xserverrc file I have the following line: exec /usr/bin/X -auth "$HOME/.Xauthority" -listen tcp "$@" And in the case of LightDM I have these options set in its config file (/etc/lightdm/lightdm.conf): egrep -v ^# /etc/lightdm/lightdm.conf [LightDM] greeter-user=lightdm minimum-display-number=0 minimum-vt=7 logind-check-graphical=true log-directory=/var/log/lightdm run-directory=/var/run/lightdm cache-directory=/var/cache/lightdm [Seat:*] xserver-command=X -listen tcp -auth "$HOME/.Xauthority" xserver-allow-tcp=true greeter-session=lightdm-gtk-greeter greeter-hide-users=false greeter-allow-guest=false greeter-show-manual-login=true greeter-show-remote-login=true user-session=openbox allow-user-switching=true allow-guest=false autologin-guest=false autologin-user-timeout=0 autologin-in-background=false [XDMCPServer] [VNCServer] Do you know why it fails to connect to the X-server when LightDM is used? Is there a way to fix it? _______________________________________________ LightDM mailing list <a href="mailto:LightDM@lists.freedesktop.org" target="_blank">LightDM@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/lightdm" rel="noreferrer" target="_blank">http://lists.freedesktop.org/mailman/listinfo/lightdm</a> </blockquote></div>