Ubuntu Mate 16.4.2 LTS外接USB键鼠突然失灵求解决方案

Hey there, let's work through this frustrating USB input device issue you're facing. Since you already know the sleep-wake trick works temporarily, let's dive into permanent fixes tailored to your setup:

System Context Recap #

• OS: Ubuntu Mate 16.4.2 LTS
• Laptop: Dell Latitude E6420
• Kernel: 4.13.0-32-generic (same issue on 4.13.0-26-generic)
• Symptom: USB keyboard/mouse completely unresponsive, USB drives work fine; sleep-wake resolves temporarily

Potential Permanent Solutions #

1. Reload USB HID Module (Quick Fix + Automate) #

Sometimes the USB human interface device (HID) module gets stuck. You can reset it manually with these commands:

sudo modprobe -r usbhid && sudo modprobe usbhid

To make this easier, you can create a simple shell script or assign a keyboard shortcut to run these commands if the issue pops up before a permanent fix is found.

2. Disable USB Auto-Suspend (Power Management Tweak) #

Ubuntu's default power management might be putting USB ports to sleep prematurely, which can break input devices. Here's how to fix it:

• Per-device rule: First, run lsusb to find your keyboard/mouse's vendor and product IDs (look for lines like Bus 001 Device 003: ID 046d:c31c Logitech, Inc. Keyboard K120 — 046d is vendor ID, c31c is product ID). Then create a udev rule:

  sudo nano /etc/udev/rules.d/50-usb-input-power.rules
  

  Add this line (replace XXXX and YYYY with your device IDs):

  SUBSYSTEM=="usb", ATTR{idVendor}=="XXXX", ATTR{idProduct}=="YYYY", TEST=="power/control", ATTR{power/control}="on"
  

  Save and exit, then reboot.
• Global disable: If you don't want to target specific devices, edit /etc/rc.local and add this line before exit 0:

  echo on > /sys/bus/usb/devices/*/power/control
  

  Reboot to apply.

3. Update or Adjust Your Kernel #

While you've seen the issue on two 4.13.x kernels, trying a different kernel branch might resolve compatibility issues:

• Upgrade to HWE kernel: Ubuntu 16.04 supports the Hardware Enablement (HWE) kernel (4.15 series, which is more stable for newer hardware). Install it with:

  sudo apt-get update && sudo apt-get install linux-generic-hwe-16.04
  

• Downgrade to default 4.4 kernel: If the newer kernel is the culprit, revert to Ubuntu 16.04's original LTS kernel:

  sudo apt-get install linux-generic
  

  After installing either option, reboot and test if the issue persists.

4. Update Dell BIOS/Firmware #

Outdated firmware can cause USB compatibility bugs. Check for updates using:

sudo apt install fwupd
sudo fwupdmgr refresh
sudo fwupdmgr update

Alternatively, reboot your laptop and press F2 to enter BIOS, then check for built-in update options (ensure your battery is fully charged before updating firmware).

5. Hardware Checks #

Even though USB drives work, double-check:

• Try plugging your keyboard/mouse into a different USB port (switch between USB 2.0 and 3.0 if available)
• Test with a different USB keyboard/mouse to rule out device-specific issues

If none of these fixes work, gather more debug info when the issue occurs:

• Run dmesg | grep usb to check for USB-related error messages
• Run lsusb -v and share the output for your keyboard/mouse (if possible) — this can help pinpoint driver or protocol issues.

内容的提问来源于stack exchange，提问作者user794477