系统更新后重启，键盘长按重复输入功能失效求助

Hey there, let's work through this keyboard repeat issue you're dealing with. From what you've already tested—ruling out hardware, user accounts, and desktop environments, plus knowing it works on a live image—it's clear this is a system-level setting or package issue specific to your installed OS. Here are actionable steps to fix it:

1. Verify and Enable Auto-Repeat in Xorg #

First, check if auto-repeat is disabled system-wide. Open any terminal (even the tty session via Strg+Alt+F1) and run:

xset q | grep "auto repeat"

If the output shows auto repeat: off, that's the root cause. Turn it back on immediately with:

xset r on

Then tweak the repeat delay (time before keys start repeating) and rate (speed of repeats) to your preference. For example:

xset r rate 200 50

(200ms delay, 50 repeats per second—adjust the numbers if you want faster/slower behavior)

2. Make Settings Persistent Across Reboots #

The xset command resets after a restart, so we need to save these settings permanently. Create an Xorg configuration file:

sudo nano /etc/X11/xorg.conf.d/90-keyboard-repeat.conf

Paste this content into the file:

Section "InputClass"
    Identifier "keyboard-repeat"
    MatchIsKeyboard "yes"
    Option "AutoRepeat" "200 50"
EndSection

Save and exit (press Ctrl+O, hit Enter, then Ctrl+X), then reboot to confirm the setting sticks.

3. Fix Repeat Behavior for TTY Sessions #

If the issue also affects your tty (Strg+Alt+F1) sessions, we need to adjust console-specific settings. First check current rates:

kbdrate -s

Set your preferred delay and rate with:

sudo kbdrate -d 200 -r 50

To make this persistent, create a systemd service:

1. Create the service file:

sudo nano /etc/systemd/system/kbdrate.service

2. Add this content:

[Unit]
Description=Set persistent keyboard repeat rate for consoles

[Service]
Type=oneshot
ExecStart=/usr/bin/kbdrate -d 200 -r 50
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

3. Enable and start the service:

sudo systemctl enable --now kbdrate.service

4. Reinstall Input-Related Packages (Post-Update Fix) #

Since this started after a system update, it's possible an input handling package got corrupted. Reinstall the relevant packages for your distro:

• For Debian/Ubuntu-based systems:

sudo apt reinstall xserver-xorg-input-libinput xserver-xorg-input-evdev keyboard-configuration

• For Fedora/RHEL-based systems:

sudo dnf reinstall xorg-x11-drv-libinput xorg-x11-drv-evdev system-config-keyboard

• For Arch-based systems:

sudo pacman -S --noconfirm xorg-xinput libinput keyboard-config

5. Check System Logs for Clues #

If none of the above works, dig into system logs to find errors related to input devices. Run:

journalctl -b | grep -i "keyboard\|input"

Look for entries about failed input drivers or misconfigured settings—this might point to a deeper issue we missed.

内容的提问来源于stack exchange，提问作者Tobias Gaertner