如何找出 Ubuntu 20.04 冻结的原因？
Cri*_*ova 5 nvidia amd-ryzen 20.04
两周前，我在我的 Amd Ryzen 5 1600 / Nvidia Gtx 1070 上安装了 Ubuntu 20.04，但 Ubuntu 不时完全死机。
键盘和屏幕完全停止工作，鼠标有时还能继续移动。我试过使用神奇的 SysRq 键，但没有用。也尝试过alt+F1但也没有得到系统的任何响应。基本上我只能按电源按钮才能重新启动。
我怀疑是英伟达，但我不知道如何验证。
nvidia-smi 显示驱动程序版本 440.100。
发现这些日志/var/log/Xorg.1.log.old显示我的计算机崩溃的时间。
[ 1223.234] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-22ms), your system is too slow
[ 1223.234] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-35ms), your system is too slow
[ 1488.529] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-0ms), your system is too slow
[ 1488.529] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-13ms), your system is too slow
[ 5125.223] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-14ms), your system is too slow
[ 5125.223] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-27ms), your system is too slow
[ 6038.321] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-9ms), your system is too slow
[ 6206.894] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-3ms), your system is too slow
[ 6206.894] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-16ms), your system is too slow
[ 6409.650] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-9ms), your system is too slow
[ 6409.650] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-22ms), your system is too slow
[ 10930.426] (EE) client bug: timer event2 debounce: scheduled expiry is in the past (-7ms), your system is too slow
[ 10930.426] (EE) client bug: timer event2 debounce short: scheduled expiry is in the past (-20ms), your system is too slow
free -h 结果：
total used free shared buff/cache available
Mem: 15Gi 2.5Gi 11Gi 393Mi 1.9Gi 12Gi
Swap: 2.0Gi 0B 2.0Gi
sysctl vm.swappiness 结果：
vm.swappiness = 60
sudo lshw -C memory 结果：
*-firmware
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 1.L0
date: 12/28/2018
size: 64KiB
capacity: 16MiB
capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb biosbootspecification uefi
*-memory
description: System Memory
physical id: f
slot: System board or motherboard
size: 16GiB
*-bank:0
description: 2933 MHz (0.3 ns) [empty]
product: Unknown
vendor: Unknown
physical id: 0
serial: Unknown
slot: DIMM 0
clock: 2933MHz (0.3ns)
*-bank:1
description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2933 MHz (0.3 ns)
product: CMK16GX4M2B3200C16
vendor: Unknown
physical id: 1
serial: 00000000
slot: DIMM 1
size: 8GiB
width: 64 bits
clock: 2933MHz (0.3ns)
*-bank:2
description: 2933 MHz (0.3 ns) [empty]
product: Unknown
vendor: Unknown
physical id: 2
serial: Unknown
slot: DIMM 0
clock: 2933MHz (0.3ns)
*-bank:3
description: DIMM DDR4 Synchronous Unbuffered (Unregistered) 2933 MHz (0.3 ns)
product: CMK16GX4M2B3200C16
vendor: Unknown
physical id: 3
serial: 00000000
slot: DIMM 1
size: 8GiB
width: 64 bits
clock: 2933MHz (0.3ns)
*-cache:0
description: L1 cache
physical id: 11
slot: L1 - Cache
size: 576KiB
capacity: 576KiB
clock: 1GHz (1.0ns)
capabilities: pipeline-burst internal write-back unified
configuration: level=1
*-cache:1
description: L2 cache
physical id: 12
slot: L2 - Cache
size: 3MiB
capacity: 3MiB
clock: 1GHz (1.0ns)
capabilities: pipeline-burst internal write-back unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: 13
slot: L3 - Cache
size: 16MiB
capacity: 16MiB
clock: 1GHz (1.0ns)
capabilities: pipeline-burst internal write-back unified
configuration: level=3
grep -i swap /etc/fstab 结果：
/swapfile none swap sw 0 0
sudo dmidecode -s bios-version 结果：
1.L0
添加软件和更新屏幕截图
8 月 6 日更新：
BIOS
\n微星 B350 战斧
\n您拥有 BIOS 版本 1.L0，日期为 2018 年 12 月 28 日。
\n这里有更新的 BIOS。编号/命名约定与现在的不同，这很不寻常。请联系 MSI 支持并询问此问题。
\n
笔记：确认我有适合您的主板型号的正确网页。
\n笔记：不要下载/使用/安装最新的BETA版本。
\n笔记：更新 BIOS 之前请做好备份。
\n\n
交换
\n让我们将 /swapfile 从 2G 增加到 4G。
\n注意：错误使用dd可能会导致数据丢失。建议复制/粘贴。
sudo swapoff -a # turn off swap\nsudo rm -i /swapfile # remove old /swapfile\n\nsudo dd if=/dev/zero of=/swapfile bs=1M count=4096\n\nsudo chmod 600 /swapfile # set proper file protections\nsudo mkswap /swapfile # init /swapfile\nsudo swapon /swapfile # turn on swap\nfree -h # confirm 16G RAM and 4G swap\nreboot # reboot and verify operation\n将此行添加到 /etc/fstab...
/swapfile \xc2\xa0 \xc2\xa0none \xc2\xa0 \xc2\xa0swap \xc2\xa0 \xc2\xa0sw \xc2\xa0 \xc2\xa0 \xc2\xa00 0\n\n
英伟达
\n您拥有 Nvidia 版本 440.100。
\nSoftware & Updates表明这是当前版本。不过，可以在此处下载较新的版本 450.57 。
\n
注意：更新 Nvidia 驱动程序之前请做好备份。
\n更新#1：
\n由于您必须强制关闭计算机电源，因此让我们检查一下您的文件系统...
\n- \n
- 以 \xe2\x80\x9c 引导至 Ubuntu Live DVD/USB 尝试 Ubuntu\xe2\x80\x9d 模式 \n
terminal按Ctrl+ Alt+打开一个窗口T \n- 类型
sudo fdisk -l\n - 识别“Linux 文件系统”的 /dev/sdXX 设备名称 \n
- 输入
sudo fsck -f /dev/sdXX，替换sdXX为您之前找到的数字 \n fsck如果有错误则重复命令 \n- 类型
reboot\n
更新#2：
\n安装 BIOS 更新...但请先联系 MSI 支持，以确认您需要哪个 BIOS 更新文件版本...因为他们的命名约定似乎已更改。
\n您已经安装了许多 GNOME Shell 扩展，其中任何一个都可能导致冻结，并且它们安装在“错误”的位置，因为它们安装在系统范围内，而不是特定于用户。您可以在 /usr/share/gnome-shell/extensions 目录列表中看到它们，它们都以 gcampax.github.com 结尾。
\n删除它们的最安全方法是访问https://extensions.gnome.org/local/并删除除这三个扩展之外的所有扩展...
\ndrwxr-xr-x 2 root root 4.0K Jun 11 08:20 \'desktop-icons@csoriano\'/\ndrwxr-xr-x 3 root root 4.0K May 12 15:17 \'ubuntu-appindicators@ubuntu.com\'/\ndrwxr-xr-x 3 root root 4.0K Jun 18 09:12 \'ubuntu-dock@ubuntu.com\'/\n如果系统运行正常并且在一段时间内没有冻结，则手动重新安装任何单个收藏夹，一次一个扩展，而不是安装扩展包/zip 文件。
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