/var/log/syslog输出：
8 09:05:53 mindtrap kernel: [ 1247.021657] usb 2-4: Set SEL for device-initiated U2 failed.
Oct 8 09:05:53 mindtrap kernel: [ 1247.021848] hub 2-4:1.0: USB hub found
Oct 8 09:05:53 mindtrap kernel: [ 1247.021861] hub 2-4:1.0: config failed, can't read hub descriptor (err -22)
Oct 8 09:05:53 mindtrap kernel: [ 1247.022021] usb 2-4: Failed to suspend device, error -19
Oct 8 09:05:53 mindtrap kernel: [ 1247.201509] usb 2-4: USB disconnect, device number 98
Oct 8 09:05:53 mindtrap kernel: [ 1247.473682] usb 2-4: new SuperSpeed USB device number 99 using xhci_hcd
Oct 8 09:05:53 mindtrap kernel: [ 1247.494446] usb 2-4: New USB device found, idVendor=0451, idProduct=8046, bcdDevice= 1.00
Oct 8 09:05:53 mindtrap kernel: [ 1247.494458] usb 2-4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Oct 8 09:05:59 mindtrap kernel: [ 1252.654212] xhci_hcd 0000:00:14.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state.
lsusb输出：
Bus 002 Device 062: ID 0451:8046 Texas Instruments, Inc.
Bus 002 Device 003: ID 174c:3074 ASMedia Technology Inc. ASM1074 SuperSpeed hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 010: ID 1462:7d43 Micro Star International MYSTIC LIGHT
Bus 001 Device 008: ID 046d:c062 Logitech, Inc. M-UAS144 [LS1 Laser Mouse]
Bus 001 Device 006: ID 17ef:6099 Lenovo Lenovo Traditional USB Keyboard
Bus 001 Device 009: ID 413c:a503 Dell Computer Corp. AC511 Sound Bar
Bus 001 Device 007: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 001 Device 005: ID 0451:8044 Texas Instruments, Inc.
Bus 001 Device 003: ID 07d1:f101 D-Link System DBT-122 Bluetooth
Bus 001 Device 012: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 011: ID 174c:2074 ASMedia Technology Inc. ASM1074 High-Speed hub
Bus 001 Device 004: ID 03f0:eb2a HP, Inc HP Color Laser MFP 178nw
Bus 001 Device 002: ID 2001:f103 D-Link Corp. DUB-H7 7-port USB 2.0 hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
这种情况经常发生并降低我的计算机速度（尤其是在启动/关闭期间）。这是关于以下内容：
Bus 002 Device 062: ID 0451:8046 Texas Instruments, Inc.
它是一个集成在我的显示器（戴尔 U2414H）中的 USB 集线器，它有一个条形音箱和一个连接到它的（罗技）网络摄像头。当我从主板上拔下屏幕的 USB 集线器电缆时，问题就消失了，但随后我...没有声音/网络摄像头。
答案1
我只需将屏幕的 USB 集线器与主板的 USB2.0 端口（我们通常连接鼠标/键盘的端口）连接起来。
这解决了我的问题。