我刚刚安装了 ubuntu 18.04 并将内核更新为 4.19.11，它不时会冻结，我也尝试过其他内核版本，也安装了几次 ubuntu，但它仍然冻结，以至于我不得不使用电源按钮强制关机。我尝试使用系统监视器或日志文件来跟踪它，但收效甚微。有人能帮我吗？
这是 /var/log/boot.log
[[0;32m OK [0m] Started Daily apt download activities.
[[0;32m OK [0m] Started Daily apt upgrade and clean activities.
[[0;32m OK [0m] Listening on UUID daemon activation socket.
[[0;32m OK [0m] Started Daily Cleanup of Temporary Directories.
[[0;32m OK [0m] Reached target Timers.
Starting Raise network interfaces...
[[0;32m OK [0m] Listening on Socket activation for snappy daemon.
[[0;32m OK [0m] Reached target Sockets.
[[0;32m OK [0m] Reached target Basic System.
Starting Detect the available GPUs and deal with any system changes...
Starting System Logging Service...
Starting Avahi mDNS/DNS-SD Stack...
Starting LSB: automatic crash report generation...
Starting Restore /etc/resolv.conf if the system crashed before the ppp link was shut down...
Starting LSB: Record successful boot for GRUB...
[[0;32m OK [0m] Started D-Bus System Message Bus.
[[0;32m OK [0m] Started Avahi mDNS/DNS-SD Stack.
Starting WPA supplicant...
Starting Dispatcher daemon for systemd-networkd...
[[0;32m OK [0m] Started ACPI event daemon.
Starting Network Manager...
[[0;32m OK [0m] Started CUPS Scheduler.
[[0;32m OK [0m] Started Make remote CUPS printers available locally.
Starting Disk Manager...
[[0;32m OK [0m] Started irqbalance daemon.
[[0;32m OK [0m] Reached target Login Prompts.
Starting Login Service...
Starting LSB: Speech Dispatcher...
[[0;32m OK [0m] Started Regular background program processing daemon.
[[0;32m OK [0m] Started Run anacron jobs.
Starting Modem Manager...
Starting Accounts Service...
Starting Save/Restore Sound Card State...
Starting Bluetooth service...
[[0;32m OK [0m] Started Set the CPU Frequency Scaling governor.
Starting Thermal Daemon Service...
Starting Snappy daemon...
[[0;32m OK [0m] Started System Logging Service.
[[0;32m OK [0m] Started Detect the available GPUs and deal with any system changes.
[[0;32m OK [0m] Started Restore /etc/resolv.conf if the system crashed before the ppp link was shut down.
[[0;32m OK [0m] Started Save/Restore Sound Card State.
[[0;32m OK [0m] Started LSB: Speech Dispatcher.
[[0;32m OK [0m] Started Bluetooth service.
[[0;32m OK [0m] Reached target Bluetooth.
Starting Authorization Manager...
[[0;32m OK [0m] Started LSB: automatic crash report generation.
[[0;32m OK [0m] Started LSB: Record successful boot for GRUB.
[[0;32m OK [0m] Started Login Service.
Starting Hostname Service...
[[0;32m OK [0m] Started Hostname Service.
[[0;32m OK [0m] Started WPA supplicant.`