<div dir="ltr"><div><div>Hi, </div>You should have a look in /var/log/lightdm/lightdm.log. This should give you more idea which part is failing. If that is fine and the error in the X log is significant this is probably an X / driver issue. </div>--Robert </div> <div class="gmail_quote"><div dir="ltr">On Tue, 12 Apr 2016 at 08:01 Hacksign <<a href="mailto:evilsign@gmail.com">evilsign@gmail.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div text="#000000" bgcolor="#FFFFFF"> what I have done: 1. login system 2. lock screen with command 'dm-tool lock' 3. active screen, enter password, login system again 4. lock screen again with command 'dm-tool lock' what happend: screen remains blank, can not active screen.this happens everytime if I take actions described above. I'm using Archlinx + lightdm + lightdm-gtk-greeter, laptop X1 carbon 2015 edition. there is a failure in /var/log/lightdm/x-0.log : [root@XSign lightdm]# cat x-0.log X.Org X Server 1.18.3 Release Date: 2016-04-04 X Protocol Version 11, Revision 0 Build Operating System: Linux 4.2.5-1-ARCH x86_64 Current Operating System: Linux XSign 4.4.5-1-ARCH #1 SMP PREEMPT Thu Mar 10 07:38:19 CET 2016 x86_64 Kernel command line: initrd=\initramfs-linux.img root=/dev/sda3 rw Build Date: 05 April 2016 05:24:02PM Current version of pixman: 0.34.0 Before reporting problems, check <a href="http://wiki.x.org" target="_blank">http://wiki.x.org</a> to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Apr 12 13:45:41 2016 (==) Using config directory: "/etc/X11/xorg.conf.d" (==) Using system config directory "/usr/share/X11/xorg.conf.d" xf86: remove device 0 /sys/devices/pci0000:00/0000:00:02.0/drm/card0 failed to find screen to remove (II) AIGLX: Suspending AIGLX clients for VT switch below is my lightdm.conf: [root@XSign lightdm]# cat /etc/lightdm/lightdm.conf # # General configuration # # start-default-seat = True to always start one seat if none are defined in the configuration # greeter-user = User to run greeter as # minimum-display-number = Minimum display number to use for X servers # minimum-vt = First VT to run displays on # lock-memory = True to prevent memory from being paged to disk # user-authority-in-system-dir = True if session authority should be in the system location # guest-account-script = Script to be run to setup guest account # logind-check-graphical = True to on start seats that are marked as graphical by logind # log-directory = Directory to log information to # run-directory = Directory to put running state in # cache-directory = Directory to cache to # sessions-directory = Directory to find sessions # remote-sessions-directory = Directory to find remote sessions # greeters-directory = Directory to find greeters # backup-logs = True to move add a .old suffix to old log files when opening new ones # [LightDM] #start-default-seat=true #greeter-user=lightdm #minimum-display-number=0 #minimum-vt=7 # Setting this to a value < 7 implies security issues, see FS#46799 #lock-memory=true #user-authority-in-system-dir=false #guest-account-script=guest-account #logind-check-graphical=false #log-directory=/var/log/lightdm run-directory=/run/lightdm #cache-directory=/var/cache/lightdm #sessions-directory=/usr/share/lightdm/sessions:/usr/share/xsessions:/usr/share/wayland-sessions #remote-sessions-directory=/usr/share/lightdm/remote-sessions #greeters-directory=/usr/share/lightdm/greeters:/usr/share/xgreeters #backup-logs=true # # Seat configuration # # Seat configuration is matched against the seat name glob in the section, for example: # [Seat:*] matches all seats and is applied first. # [Seat:seat0] matches the seat named "seat0". # [Seat:seat-thin-client*] matches all seats that have names that start with "seat-thin-client". # # type = Seat type (xlocal, xremote, unity) # pam-service = PAM service to use for login # pam-autologin-service = PAM service to use for autologin # pam-greeter-service = PAM service to use for greeters # xserver-command = X server command to run (can also contain arguments e.g. X -special-option) # xmir-command = Xmir server command to run (can also contain arguments e.g. Xmir -special-option) # xserver-config = Config file to pass to X server # xserver-layout = Layout to pass to X server # xserver-allow-tcp = True if TCP/IP connections are allowed to this X server # xserver-share = True if the X server is shared for both greeter and session # xserver-hostname = Hostname of X server (only for type=xremote) # xserver-display-number = Display number of X server (only for type=xremote) # xdmcp-manager = XDMCP manager to connect to (implies xserver-allow-tcp=true) # xdmcp-port = XDMCP UDP/IP port to communicate on # xdmcp-key = Authentication key to use for XDM-AUTHENTICATION-1 (stored in keys.conf) # unity-compositor-command = Unity compositor command to run (can also contain arguments e.g. unity-system-compositor -special-option) # unity-compositor-timeout = Number of seconds to wait for compositor to start # greeter-session = Session to load for greeter # greeter-hide-users = True to hide the user list # greeter-allow-guest = True if the greeter should show a guest login option # greeter-show-manual-login = True if the greeter should offer a manual login option # greeter-show-remote-login = True if the greeter should offer a remote login option # user-session = Session to load for users # allow-user-switching = True if allowed to switch users # allow-guest = True if guest login is allowed # guest-session = Session to load for guests (overrides user-session) # session-wrapper = Wrapper script to run session with # greeter-wrapper = Wrapper script to run greeter with # guest-wrapper = Wrapper script to run guest sessions with # display-setup-script = Script to run when starting a greeter session (runs as root) # display-stopped-script = Script to run after stopping the display server (runs as root) # greeter-setup-script = Script to run when starting a greeter (runs as root) # session-setup-script = Script to run when starting a user session (runs as root) # session-cleanup-script = Script to run when quitting a user session (runs as root) # autologin-guest = True to log in as guest by default # autologin-user = User to log in with by default (overrides autologin-guest) # autologin-user-timeout = Number of seconds to wait before loading default user # autologin-session = Session to load for automatic login (overrides user-session) # autologin-in-background = True if autologin session should not be immediately activated # exit-on-failure = True if the daemon should exit if this seat fails # [Seat:*] #type=xlocal #pam-service=lightdm #pam-autologin-service=lightdm-autologin #pam-greeter-service=lightdm-greeter #xserver-command=X #xmir-command=Xmir #xserver-config= #xserver-layout= #xserver-allow-tcp=false #xserver-share=true #xserver-hostname= #xserver-display-number= #xdmcp-manager= #xdmcp-port=177 #xdmcp-key= #unity-compositor-command=unity-system-compositor #unity-compositor-timeout=60 #greeter-session=example-gtk-gnome #greeter-hide-users=false #greeter-allow-guest=true #greeter-show-manual-login=false #greeter-show-remote-login=true #user-session=default #allow-user-switching=true #allow-guest=true #guest-session= session-wrapper=/etc/lightdm/Xsession #greeter-wrapper= #guest-wrapper= #display-setup-script= #display-stopped-script= #greeter-setup-script= #session-setup-script= #session-cleanup-script= #autologin-guest=false #autologin-user= #autologin-user-timeout=0 #autologin-in-background=false #autologin-session= exit-on-failure=true # # XDMCP Server configuration # # enabled = True if XDMCP connections should be allowed # port = UDP/IP port to listen for connections on # listen-address = Host/address to listen for XDMCP connections (use all addresses if not present) # key = Authentication key to use for XDM-AUTHENTICATION-1 or blank to not use authentication (stored in keys.conf) # # The authentication key is a 56 bit DES key specified in hex as 0xnnnnnnnnnnnnnn. Alternatively # it can be a word and the first 7 characters are used as the key. # [XDMCPServer] #enabled=false #port=177 #listen-address= #key= # # VNC Server configuration # # enabled = True if VNC connections should be allowed # command = Command to run Xvnc server with # port = TCP/IP port to listen for connections on # listen-address = Host/address to listen for VNC connections (use all addresses if not present) # width = Width of display to use # height = Height of display to use # depth = Color depth of display to use # [VNCServer] #enabled=false #command=Xvnc #port=5900 #listen-address= #width=1024 #height=768 #depth=8 and my lightdm-gtk-greeter.conf: [root@XSign lightdm]# cat /etc/lightdm/lightdm-gtk-greeter.conf [greeter] background = /etc/lightdm/background.jpg user-background = false theme-name = TraditionalOk icon-theme-name = ultra-flat-icons font-name = 思源黑体 CN Semi-Light 10 clock-format = %Y-%m-%d %H:%M xft-dpi = 96 xft-antialias = true </div> _______________________________________________ LightDM mailing list <a href="mailto:LightDM@lists.freedesktop.org" target="_blank">LightDM@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/lightdm" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/lightdm</a> </blockquote></div>