Fedora30,见日志:
20:25:06 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:24:38 gnome-session-b: GLib-CRITICAL: g_child_watch_add_full: assertion 'pid > 0' failed
20:24:37 reporter-system: System encountered a non-fatal error in phy_state_machine()
20:24:31 spice-vdagent: Cannot access vdagent virtio channel /dev/virtio-ports/com.redhat.spice.0
20:24:29 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:24:22 gdm-session-wor: gkr-pam: unable to locate daemon control file
20:24:20 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:24:17 systemd: Timed out waiting for device /dev/sd5.
20:24:17 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:23:22 spice-vdagent: Cannot access vdagent virtio channel /dev/virtio-ports/com.redhat.spice.0
20:23:21 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:23:06 firewalld: ERROR: Failed to load zone file '/usr/lib/firewalld/zones/libvirt.xml': PARSE_ERROR: rule: Unexpected attribute priority
20:23:05 reporter-system: System encountered a non-fatal error in phy_state_machine()
20:23:04 xinetd: Must specify a server in node
20:23:03 reporter-system: System encountered a non-fatal error in rtl8169_net_suspend()
20:22:50 logger: Failed to re-set power saving mode for wireless card
20:22:46 systemd: Timed out waiting for device /dev/sd5.
20:21:42 logger: Failed to re-set power saving mode for wireless card

(苦逼)

补充一点，我尝试过很多发行版,如Debian,deepin,ubuntu及其衍生版，都有这种问题。
在线等，急！！！！！

贴上来的错误主要是网卡驱动有问题，也有一句是gnome-session 挂了。看起来后者更有可能是原因。网卡驱动的小问题应该不会造成卡死。