lightdm log显示
sudo cat /var/log/lightdm/x-0.log X.Org X Server 1.18.4 Release Date: 2016-07-19 X Protocol Version 11, Revision 0 Build Operating System: Linux 4.4.0-83-generic aarch64 Ubuntu Current Operating System: Linux firefly 4.4.52 #19 SMP Tue May 2 11:36:30 HKT 2017 aarch64 Kernel command line: console=ttyFIQ0 root=/dev/mmcblk1p6 rw rootwait mtdparts=rk29xxnand:0x00002000@0x00002000(uboot),0x00002000@0x00004000(trust),0x00008000@0x00006000(resource),0x0000A000@0x0000E000(kernel),0x00002000@0x00018000(backup),-@0x0001A000(boot) storagemedia=emmc uboot_logo=0x02000000@0x7dc00000 loader.timestamp=2017-04-25_15:10:21 androidboot.mode=emmc Build Date: 17 July 2017 05:05:58PM xorg-server 2:1.18.4-0ubuntu0.3 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.33.6 Before reporting problems, check http://wiki.x.org 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: Fri Feb 12 00:28:08 2016 (==) Using config directory: "/etc/X11/xorg.conf.d" (==) Using system config directory "/usr/share/X11/xorg.conf.d" (EE) (EE) Backtrace: (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x58) [0x5581f49ce0] (EE) (EE) Segmentation fault at address 0x7f9fa00000 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file.