服务器异常，看了message日志是有一个时间段的日志断开了，看了前后的日志有报错，没有查出什么问题，下面是日志
Dec 29 10:50:33 zc-local-20776 kernel: [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training
Dec 29 10:50:33 zc-local-20776 kernel: [drm:intel_dp_start_link_train [i915]] *ERROR* failed to start channel equalization
Dec 29 10:50:33 zc-local-20776 systemd: Reached target Sleep.
Dec 29 10:50:33 zc-local-20776 systemd: Starting Sleep.
Dec 29 10:50:33 zc-local-20776 systemd: Starting Suspend...
Dec 29 10:50:33 zc-local-20776 systemd-sleep: Suspending system...
Dec 29 10:50:33 zc-local-20776 kernel: [drm:intel_dp_start_link_train [i915]] *ERROR* failed to enable link training
Dec 29 10:50:33 zc-local-20776 kernel: [drm:intel_dp_start_link_train [i915]] *ERROR* failed to start channel equalization
Dec 29 10:50:33 zc-local-20776 systemd: Reached target Sleep.
Dec 29 10:50:33 zc-local-20776 systemd: Starting Sleep.
Dec 29 10:50:33 zc-local-20776 systemd: Starting Suspend...
Dec 29 10:50:33 zc-local-20776 systemd-sleep: Suspending system...
Dec 29 11:10:59 zc-local-20776 journal: Runtime journal is using 88.0M (max allowed 387.2M, trying to leave 580.8M free of 3.6G available → current limit 387.2M).
Dec 29 11:10:59 zc-local-20776 journal: Runtime journal is using 88.0M (max allowed 387.2M, trying to leave 580.8M free of 3.6G available → current limit 387.2M).
Dec 29 11:10:59 zc-local-20776 kernel: PM: Syncing filesystems ... done.
Dec 29 11:10:59 zc-local-20776 kernel: Freezing user space processes ... (elapsed 0.006 seconds) done.
Dec 29 11:10:59 zc-local-20776 kernel: Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Dec 29 11:10:59 zc-local-20776 kernel: Suspending console(s) (use no_console_suspend to debug)
Dec 29 11:10:59 zc-local-20776 kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Dec 29 11:10:59 zc-local-20776 kernel: sd 0:0:0:0: [sda] Stopping disk
Dec 29 11:10:59 zc-local-20776 kernel: i8042 aux 00:02: System wakeup disabled by ACPI
Dec 29 11:10:59 zc-local-20776 kernel: i8042 kbd 00:01: System wakeup enabled by ACPI
Dec 29 11:10:59 zc-local-20776 kernel: PM: suspend of devices complete after 116.043 msecs
Dec 29 11:10:59 zc-local-20776 kernel: PM: late suspend of devices complete after 11.147 msecs
/var/log/messages：记录Linux内核消息及各种应用程序的公共日志信息，包括启动、IO错误、网络错误、程序错误等。messages本身不会一直有日志输出的呀。