什么是 USB 错误 -62？

Question

当我将 USB 鼠标插入计算机时，日志中出现以下错误：

Mar 24 21:43:03 homer kernel: [ 2674.768039] usb 2-9: new full-speed USB device number 3 using ohci_hcd
Mar 24 21:43:03 homer kernel: [ 2674.952050] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:03 homer kernel: [ 2675.236034] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:03 homer kernel: [ 2675.516035] usb 2-9: new full-speed USB device number 4 using ohci_hcd
Mar 24 21:43:04 homer kernel: [ 2675.696042] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:04 homer kernel: [ 2675.980047] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:04 homer kernel: [ 2676.260043] usb 2-9: new full-speed USB device number 5 using ohci_hcd
Mar 24 21:43:05 homer kernel: [ 2676.668034] usb 2-9: device not accepting address 5, error -62
Mar 24 21:43:05 homer kernel: [ 2676.764039] hub 2-0:1.0: unable to enumerate USB device on port 9
Mar 24 21:43:14 homer kernel: [ 2685.852045] usb 2-9: new full-speed USB device number 7 using ohci_hcd
Mar 24 21:43:14 homer kernel: [ 2686.036033] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:14 homer kernel: [ 2686.324032] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:14 homer kernel: [ 2686.608043] usb 2-9: new full-speed USB device number 8 using ohci_hcd
Mar 24 21:43:15 homer kernel: [ 2686.788043] usb 2-9: device descriptor read/64, error -62
Mar 24 21:43:15 homer kernel: [ 2687.076043] usb 2-9: device descriptor read/64, error -62

我在 askubuntu 上看到过类似的问题，有类似的错误消息，但从来没有出现过 -62 错误。这个错误代码是什么意思？是否有包含所有错误代码及其含义的表格？我谷歌搜索但找不到它。

Answer 1

确实有一个内核错误代码列表，根据您的系统设置方式，您应该在/usr/include/asm-generic/errno.h. 要查找错误 62，只需运行：

$ grep '62' /usr/include/asm-generic/errno.h
#define ETIME       62  /* Timer expired */

要浏览 100 多个错误代码的整个列表，请尝试：

cat /usr/include/asm-generic/errno.h | less

这应该为您找到 USB 设备故障的原因提供了一个起点。我怀疑硬件（USB 设备）在连接方面有问题，内核只是在尝试运行设备时超时=错误 62。