<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr"> Finall, the problme is on my side, I forget to install the windows manager (icewm) because of some changes I did in my puppet module. after icewm is installed, vnc +lightdm are working well. Xiaomei <div style="color: rgb(0, 0, 0);"> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: LightDM <lightdm-bounces@lists.freedesktop.org> on behalf of xm xm <niu_xiaomei@hotmail.com> Sent: Thursday, March 15, 2018 4:06 PM To: lightdm@lists.freedesktop.org Subject: Re: [LightDM] kernel: lightdm-gtk-gre segfault at 0 ip <div> </div> </div> <div dir="ltr"> <div id="x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif"> here are the configurations I have: <div> cat /etc/lightdm/lightdm.conf [LightDM] minimum-vt=1 user-authority-in-system-dir=true start-default-seat=false [SeatDefaults] xserver-command=X -background none greeter-session=lightdm-greeter greeter-hide-users=true greeter-show-manual-login=true user-session=/usr/share/xsessions/xfce.desktop allow-guest=false session-wrapper=/etc/X11/xinit/Xsession [XDMCPServer] enabled=true [VNCServer] enabled=true </div> <div>cat /etc/lightdm/lightdm-gtk-greeter.conf [greeter] background=/usr/share/backgrounds/lightdm_cc.jpg show-indicators=~session show-clock=true clock-format=%c </div> Any help is welcom. <div style="color:rgb(0,0,0)"> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="x_divRplyFwdMsg" dir="ltr">From: xm xm <niu_xiaomei@hotmail.com> Sent: Thursday, March 15, 2018 3:49 PM To: lightdm@lists.freedesktop.org Subject: kernel: lightdm-gtk-gre segfault at 0 ip <div> </div> </div> <div dir="ltr"> <div id="x_x_divtagdefaultwrapper" dir="ltr" style="font-size:12pt; color:#000000; font-family:Calibri,Helvetica,sans-serif"> Hello everyone, I use tigervnc and lightdm on two CentOS 7.4 servers. The following packages are installed: kernel: kernel-3.10.0-693.17.1.el7.x86_64 <div>lightdm-1.18.3-5.el7.x86_64 lightdm-gobject-1.18.3-5.el7.x86_64 lightdm-gtk-1.8.5-19.el7.x86_64 lightdm-gtk-common-1.8.5-19.el7.noarch tigervnc-license-1.8.0-2.el7_4.noarch tigervnc-server-1.8.0-2.el7_4.x86_64 tigervnc-server-minimal-1.8.0-2.el7_4.x86_64 </div> One is workering for more than one year . The 2nd one also. but yesterday I have to reinstall it because one disk is failed and changed. After the installation, I believe I did the same configuation, but the 2nd one is not working. The VNC connection is just showing a black screen, then close. I see the following error logs: <div> lightdm[32702]: g_object_unref: assertion 'G_IS_OBJECT (object)' failed lightdm[37158]: pam_unix(lightdm-greeter:session): session opened for user lightdm by (uid=0) lightdm[32702]: Error activating login1 session: GDBus.Error:org.freedesktop.DBus.Error.NotSupported: Operation not supported </div> kernel: lightdm-gtk-gre[37161]: segfault at 0 ip 000055fa326fc710 sp 00007ffd011f8fc0 error 4 in lightdm-gtk-greeter[55fa326f2000+13000] The last line above, looks like something related with kernel? I really lost. Please let me know if you need more information for my problem. Thanks in advance! Xm </div> </div> </div> </div> </div> </div> </div> </body> </html>