我遇到了一个奇怪的问题，我们有一台英特尔 Nuc 5i3RYH，它有一个英特尔 i3-5005U CPU，根据英特尔网站，它有 HD5500 显卡。
我们在这台机器上运行 Xubuntu 18.04.2，设置为自动登录并全屏启动网络浏览器，因为它正在驱动我们公共休息室的信息屏幕。
我最近升级到了 18.04.3，它已经停止工作了，但奇怪的是，如果我通过 ssh 登录并重新启动 x 服务器，它会重新启动并且自动登录可以正常工作，这很奇怪。
/var/log/lightdm.log 此处：
[+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log
[+0.00s] DEBUG: Starting Light Display Manager 1.26.0, UID=0 PID=620
[+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-disable-guest.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-disable-log-backup.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-greeter-wrapper.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-xserver-command.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/50-xubuntu-numlock.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/60-lightdm-gtk-greeter.conf
[+0.00s] DEBUG: Loading configuration from /usr/share/lightdm/lightdm.conf.d/60-xubuntu.conf
[+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d
[+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf
[+0.00s] DEBUG: Registered seat module local
[+0.00s] DEBUG: Registered seat module xremote
[+0.00s] DEBUG: Registered seat module unity
[+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager
[+0.02s] DEBUG: Monitoring logind for seats
[+0.02s] DEBUG: New seat added from logind: seat0
[+0.02s] DEBUG: Seat seat0: Loading properties from config section Seat:*
[+0.02s] DEBUG: Seat seat0: Starting
[+0.02s] DEBUG: Seat seat0: Creating user session
[+0.03s] DEBUG: Loading users from org.freedesktop.Accounts
[+0.03s] DEBUG: User /org/freedesktop/Accounts/User1000 added
[+0.14s] DEBUG: User /org/freedesktop/Accounts/User1001 added
[+0.16s] DEBUG: Seat seat0: Creating display server of type x
[+0.18s] DEBUG: Quitting Plymouth
[+0.19s] DEBUG: Using VT 7
[+0.19s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.19s] DEBUG: XServer 0: Logging to /var/log/lightdm/x-0.log
[+0.19s] DEBUG: XServer 0: Writing X server authority to /var/run/lightdm/root/:0
[+0.19s] DEBUG: XServer 0: Launching X Server
[+0.19s] DEBUG: Launching process 701: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.19s] DEBUG: XServer 0: Waiting for ready signal from X server :0
[+0.19s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
[+0.19s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0
[+0.73s] DEBUG: Process 701 terminated with signal 6
[+0.73s] DEBUG: XServer 0: X server stopped
[+0.73s] DEBUG: Releasing VT 7
[+0.73s] DEBUG: XServer 0: Removing X server authority /var/run/lightdm/root/:0
[+0.73s] DEBUG: Seat seat0: Display server stopped
[+0.73s] DEBUG: Seat seat0: Stopping session
[+0.73s] DEBUG: Seat seat0: Session stopped
[+0.73s] DEBUG: Seat seat0: Stopping display server, no sessions require it
[+0.73s] DEBUG: Seat seat0: Active display server stopped, starting greeter
[+0.73s] DEBUG: Seat seat0: Creating greeter session
[+0.73s] DEBUG: Seat seat0: Creating display server of type x
[+0.73s] DEBUG: Using VT 7
[+0.73s] DEBUG: Seat seat0: Starting local X display on VT 7
[+0.73s] DEBUG: XServer 0: Logging to /var/log/lightdm/x-0.log
[+0.73s] DEBUG: XServer 0: Writing X server authority to /var/run/lightdm/root/:0
[+0.73s] DEBUG: XServer 0: Launching X Server
[+0.73s] DEBUG: Launching process 767: /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
[+0.73s] DEBUG: XServer 0: Waiting for ready signal from X server :0
[+1.79s] DEBUG: Got signal 10 from process 767
[+1.79s] DEBUG: XServer 0: Got signal from X server :0
[+1.79s] DEBUG: XServer 0: Connecting to XServer :0
[+1.82s] DEBUG: Seat seat0: Display server ready, starting session authentication
[+1.82s] DEBUG: Session pid=813: Started with service 'lightdm-greeter', username 'lightdm'
[+1.83s] DEBUG: Session pid=813: Authentication complete with return value 0: Success
[+1.83s] DEBUG: Seat seat0: Session authenticated, running command
[+1.83s] DEBUG: Launching process 816: xubuntu-numlockx
[+1.91s] DEBUG: Process 816 exited with return value 0
[+1.91s] DEBUG: Seat seat0: Exit status of xubuntu-numlockx: 0
[+1.91s] DEBUG: Session pid=813: Running command /usr/lib/lightdm/lightdm-greeter-session /usr/sbin/lightdm-gtk-greeter
[+1.91s] DEBUG: Creating shared data directory /var/lib/lightdm-data/lightdm
[+1.91s] DEBUG: Session pid=813: Logging to /var/log/lightdm/seat0-greeter.log
[+1.99s] DEBUG: Activating VT 7
[+1.99s] DEBUG: Activating login1 session c1
[+1.99s] DEBUG: Seat seat0 changes active session to c1
[+1.99s] DEBUG: Session c1 is already active
[+2.14s] DEBUG: Greeter connected version=1.26.0 api=1 resettable=false
[+2.42s] DEBUG: Greeter start authentication for itadmin
[+2.42s] DEBUG: Session pid=893: Started with service 'lightdm', username 'itadmin'
[+2.43s] DEBUG: Session pid=893: Got 1 message(s) from PAM
[+2.43s] DEBUG: Prompt greeter with 1 message(s)
/var/log/x-0.log
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-148-generic x86_64 Ubuntu
Current Operating System: Linux crdisplay 5.0.0-31-generic #33~18.04.1-Ubuntu SMP Tue Oct 1 10:20:39 UTC 2019 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.0.0-31-generic root=UUID=7ba381e6-d61f-489f-ae9c-a7e462ea269c ro quiet splash vt.handoff=1
Build Date: 02 May 2019 08:06:54AM
xorg-server-hwe-18.04 2:1.20.4-1ubuntu3~18.04.1 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.34.0
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: Mon Oct 7 15:23:36 2019
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
vesa: Ignoring device with a bound kernel driver
vesa: Ignoring device with a bound kernel driver
(EE)
Fatal server error:
(EE) no screens found(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.
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.4.0-148-generic x86_64 Ubuntu
Current Operating System: Linux crdisplay 5.0.0-31-generic #33~18.04.1-Ubuntu SMP Tue Oct 1 10:20:39 UTC 2019 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.0.0-31-generic root=UUID=7ba381e6-d61f-489f-ae9c-a7e462ea269c ro quiet splash vt.handoff=1
Build Date: 02 May 2019 08:06:54AM
xorg-server-hwe-18.04 2:1.20.4-1ubuntu3~18.04.1 (For technical support please see http://www.ubuntu.com/support)
Current version of pixman: 0.34.0
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: Mon Oct 7 15:23:37 2019
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(II) modeset(0): Initializing kms color map for depth 24, 8 bpc.
有人知道这里发生了什么事吗？
干杯。
菲尔。