笔记本方向键失效求助：Windows正常Ubuntu Budgie 17.10异常

Hey there, let’s tackle this frustrating directional keys issue on your Acer laptop. Since you’ve already ruled out physical damage and tried basic keyboard configuration tweaks, let’s dive into more targeted troubleshooting steps:

1. Verify if the system detects the key presses #

First, we need to confirm whether your Ubuntu system is even registering the directional key inputs at the low level:

• Install the evtest tool to monitor input events:

  sudo apt-get update && sudo apt-get install evtest
  

• Run evtest and select your keyboard device (look for entries like "AT Translated Set 2 keyboard" in the list).
• Press the problematic directional keys. If you see event logs popping up, the issue is with upper-layer configuration (Xorg or Budgie settings). If nothing shows up, we’re looking at a kernel driver or hardware compatibility problem.

2. Reset Xorg keyboard configuration #

Corrupted Xorg keyboard settings can often cause this kind of issue. Let’s regenerate the config:

• Back up your current configuration first:

  sudo cp /etc/X11/xorg.conf.d/00-keyboard.conf /etc/X11/xorg.conf.d/00-keyboard.conf.bak
  

• Re-run the keyboard configuration utility:

  sudo dpkg-reconfigure keyboard-configuration
  

• When prompted, select the correct keyboard model (try "Acer" or "Generic 105-key PC"), your preferred layout, and follow the prompts to finish.
• Restart the display manager to apply changes:

  sudo systemctl restart display-manager
  

  (Alternatively, just reboot your system for good measure.)

3. Address Intel Bay Trail compatibility quirks #

Your laptop uses an Intel Bay Trail CPU, which has had occasional keyboard driver quirks on older Ubuntu releases like 17.10. Let’s tweak kernel parameters to fix this:

• Edit the GRUB configuration file:

  sudo nano /etc/default/grub
  

• Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT and add one of these parameters (try them one by one if the first doesn’t work):
  • i8042.nopnp=1 (disables plug-and-play for the PS/2 controller)
  • atkbd.reset (resets the AT keyboard driver on boot)
    Example modified line:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nopnp=1"
  

• Save the file (Ctrl+O, then Enter) and exit nano (Ctrl+X).
• Update GRUB to apply the changes:

  sudo update-grub
  

• Reboot your laptop and test the directional keys.

4. Rule out Budgie DE-specific issues #

Sometimes desktop environment settings or corrupted user profiles can interfere:

• Check for shortcut conflicts: Open Budgie Settings → Keyboard → Shortcuts. Look for any entries that use the directional keys (e.g., window tiling shortcuts) and disable them temporarily to test.
• Test with a new user account: Create a fresh user via Settings → Users, log into the new account, and see if the directional keys work. If they do, your original user’s configuration files are corrupted—you can either migrate to the new account or reset the Budgie settings for your original user.

5. Consider system upgrade (optional but recommended) #

Ubuntu 17.10 is an end-of-life release, which means it no longer receives security updates or bug fixes. Upgrading to a supported LTS release like 18.04 or 20.04 might resolve the compatibility issue entirely. Just make sure to back up your important data before upgrading.

If none of these steps work, share the output of dmesg | grep -i keyboard—this will show any kernel-level errors related to your keyboard, which can help narrow down the problem further.

内容的提问来源于stack exchange，提问作者yato