Ubuntu 19.04 在写入磁盘 SSD 时冻结

Question

我刚刚从 18.10（之前从 Debian Stretch）更新到 19.04。升级后，任何写入操作都会使整个系统（包括鼠标）冻结 3 秒或更长时间。这很奇怪，因为升级之前没有发生过，而且系统是一样的。hdparm 报告 517 MB/s 读取和 smart 没有显示任何错误：

sudo smartctl -a /dev/sdb
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-5.0.0-13-generic] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     LITEON L8H-128V2G-11 M.2 2280 128GB
Serial Number:    BR0RJW291CB0075GB0VE
Firmware Version: F87110C
User Capacity:    128.035.676.160 bytes [128 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      M.2
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2 (minor revision not indicated)
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Sat Apr 20 11:47:56 2019 -03
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x02) Offline data collection activity
                    was completed without error.
                    Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0) The previous self-test routine completed
                    without error or no self-test has ever 
                    been run.
Total time to complete Offline 
data collection:        (    0) seconds.
Offline data collection
capabilities:            (0x11) SMART execute Offline immediate.
                    No Auto Offline data collection support.
                    Suspend Offline collection upon new
                    command.
                    No Offline surface scan supported.
                    Self-test supported.
                    No Conveyance Self-test supported.
                    No Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                    General Purpose Logging supported.
Short self-test routine 
recommended polling time:    (   1) minutes.
Extended self-test routine
recommended polling time:    (  10) minutes.
SCT capabilities:          (0x003d) SCT Status supported.
                    SCT Error Recovery Control supported.
                    SCT Feature Control supported.
                    SCT Data Table supported.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0003   100   100   000    Pre-fail  Always       -       0
  9 Power_On_Hours          0x0002   100   100   000    Old_age   Always       -       681
 12 Power_Cycle_Count       0x0003   100   100   000    Pre-fail  Always       -       535
175 Program_Fail_Count_Chip 0x0003   100   100   000    Pre-fail  Always       -       0
176 Erase_Fail_Count_Chip   0x0003   100   100   000    Pre-fail  Always       -       0
177 Wear_Leveling_Count     0x0003   100   100   000    Pre-fail  Always       -       76
178 Used_Rsvd_Blk_Cnt_Chip  0x0003   100   100   000    Pre-fail  Always       -       0
179 Used_Rsvd_Blk_Cnt_Tot   0x0003   100   100   000    Pre-fail  Always       -       0
180 Unused_Rsvd_Blk_Cnt_Tot 0x0003   100   100   000    Pre-fail  Always       -       147
181 Program_Fail_Cnt_Total  0x0003   100   100   000    Pre-fail  Always       -       0
182 Erase_Fail_Count_Total  0x0003   100   100   000    Pre-fail  Always       -       0
187 Reported_Uncorrect      0x0003   100   100   000    Pre-fail  Always       -       0
195 Hardware_ECC_Recovered  0x0003   100   100   000    Pre-fail  Always       -       0
241 Total_LBAs_Written      0x0003   100   100   000    Pre-fail  Always       -       215371
242 Total_LBAs_Read         0x0003   100   100   000    Pre-fail  Always       -       68520

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%        58         -
# 2  Short offline       Completed without error       00%        58         -
# 3  Short offline       Completed without error       00%        58         -
# 4  Short offline       Completed without error       00%         0         -

Selective Self-tests/Logging not supported

fstab 具有用于带有 LVM 的系统的通用选项：

cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/euclides--vg-root / ext4    noatime,nodiratime,errors=remount-ro 0       1
# /boot was on /dev/sdb1 during installation
UUID=456b218a-f23c-4a35-8b39-ad416b03204f /boot           ext2    defaults        0       2
/dev/mapper/euclides--vg-home /home           ext4    defaults        0       2
/swapfile                                 none            swap    sw              0       0

关于发生了什么以及如何解决这个问题的任何想法？

编辑：为了测试，我从 Gnome 切换到 KDE，令人惊讶的是，延迟消失了。所以这可能不是我的 SSD 的问题，而是与 Gnome 相关的问题。

Answer 1

如果您在 Ubuntu 19.04 上安装了 nVIDIA 和 Gnome 3.32，请按照以下步骤操作： https: //devtalk.nvidia.com/default/topic/957814/linux/prime-and-prime-synchronization/post/5323965/#5323965 将变量添加为如下：

sudo gedit /etc/environment
__GL_MaxFramesAllowed=1

在我的 Dell 7577 笔记本电脑（配备带有 max-Q 设计的 nVIDIA GTX 1060）上，自从从 Ubuntu 18.10 升级到 19.04 后，当启动 Thunderbird 或 Firefox 等应用程序时，我会冻结 2 秒。VLC 也很卡顿。有了上面的变量，我的 gnome 就可以顺利运行了。

Answer 2

您可能遇到了此处描述的 APST 错误：
1. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1678184
2. https://bugs.launchpad.net/ubuntu/+source/ linux/+错误/1689357

他们建议编辑 /etc/default/grub 并 在 不同设备的 内核命令行中添加内核参数nvme_core.default_ps_max_latency_us=xxx ， xxx不同，如果它适用于0，您可以开始增加到（最大 5500）以允许更深层次的省电状态。不要忘记在编辑后和重新启动前运行 update-grub。无论如何，请阅读主题。