Finally tracked down and came up with a work around for that weird bug. Sometimes i3's input gets into a weird state, I think because some windows either don't close properly or move the focus somewhere it shouldn't be. Either way it breaks keyboard input completely even though i3 itself is fine. Added a watchdog to check for this condition and reset i3 if it happens. Sure, your desktop may pop up but it beats the hell out of a frozen GUI.
This commit is contained in:
Storm Dragon
144
scripts/i3_watchdog.sh
Executable file
144
scripts/i3_watchdog.sh
Executable file
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#!/usr/bin/env bash
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# I38 i3 Watchdog - Monitors i3 responsiveness and auto-restarts on lockup
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# This script runs in the background and checks if i3 is responding to commands
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# Configuration
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checkInterval=3 # Check every 3 seconds
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timeoutSeconds=2 # Consider i3 locked if it doesn't respond within 2 seconds
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pidFile="${HOME}/.config/i3/i3_watchdog.pid"
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log_message() {
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echo "[i3-watchdog] $*"
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}
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# Kill any existing watchdog instances
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if [[ -f "$pidFile" ]]; then
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oldPid=$(cat "$pidFile")
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if kill -0 "$oldPid" 2>/dev/null; then
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log_message "Killing old watchdog instance (PID: $oldPid)"
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kill "$oldPid" 2>/dev/null
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fi
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fi
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# Write our PID
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echo "$$" > "$pidFile"
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log_message "I38 Watchdog started (PID: $$)"
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lastSuccessTime=$(date +%s)
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consecutiveFailures=0
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while true; do
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sleep "$checkInterval"
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# Check if i3 is still running
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if ! pgrep -x i3 > /dev/null; then
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log_message "i3 process not found - exiting watchdog"
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rm -f "$pidFile"
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exit 0
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fi
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# Try to communicate with i3 IPC AND check X focus
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ipcWorks=0
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focusWorks=0
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if timeout "$timeoutSeconds" i3-msg -t get_version > /dev/null 2>&1; then
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ipcWorks=1
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fi
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# Also check if X focus is working
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if DISPLAY=:0 timeout 1 xdotool getwindowfocus > /dev/null 2>&1; then
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focusWorks=1
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fi
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# Both must work for system to be healthy
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if [[ $ipcWorks -eq 1 ]] && [[ $focusWorks -eq 1 ]]; then
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# Success - reset counters
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lastSuccessTime=$(date +%s)
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consecutiveFailures=0
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else
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# Failed - increment failure counter
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((consecutiveFailures++))
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currentTime=$(date +%s)
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timeSinceSuccess=$((currentTime - lastSuccessTime))
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log_message "Health check failed - IPC:$ipcWorks Focus:$focusWorks (failure #$consecutiveFailures, ${timeSinceSuccess}s since last success)"
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# If we've had 2+ consecutive failures, i3 is likely frozen
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if [[ $consecutiveFailures -ge 2 ]]; then
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log_message "CRITICAL: i3 IPC frozen for ${timeSinceSuccess}s - running diagnostics"
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# Check what processes exist
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i3Pid=$(pgrep -x i3)
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soundPid=$(pgrep -f "scripts/sound.py")
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log_message "Process check: i3=$i3Pid sound.py=$soundPid"
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# Check i3 process state
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if [[ -n "$i3Pid" ]]; then
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i3State=$(ps -o stat= -p "$i3Pid" 2>/dev/null)
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log_message "i3 process state: $i3State"
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fi
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# Check sound.py process state
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if [[ -n "$soundPid" ]]; then
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soundState=$(ps -o stat= -p "$soundPid" 2>/dev/null)
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log_message "sound.py process state: $soundState"
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# Check what sound.py is doing
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soundStack=$(cat "/proc/$soundPid/stack" 2>/dev/null | head -5)
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log_message "sound.py kernel stack: $soundStack"
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fi
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# Try to get i3 socket info
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i3Socket=$(i3 --get-socketpath 2>/dev/null)
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log_message "i3 socket path: $i3Socket"
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if [[ -n "$i3Socket" ]] && [[ -S "$i3Socket" ]]; then
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socketInfo=$(ls -l "$i3Socket" 2>/dev/null)
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log_message "Socket exists: $socketInfo"
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else
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log_message "Socket does not exist or is not a socket!"
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fi
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# Check if this is a focus issue (Wine keyboard grab bug)
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focusCheck=$(DISPLAY=:0 xdotool getwindowfocus 2>&1)
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log_message "Focus check result: $focusCheck"
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# Try to reset focus to i3
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log_message "Attempting to reset X focus..."
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DISPLAY=:0 xdotool key --clearmodifiers Super_L 2>/dev/null
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sleep 0.5
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# Try to focus on i3's root window
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i3RootWindow=$(DISPLAY=:0 xdotool search --class "i3" | head -1)
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if [[ -n "$i3RootWindow" ]]; then
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log_message "Focusing i3 root window: $i3RootWindow"
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DISPLAY=:0 xdotool windowfocus "$i3RootWindow" 2>/dev/null
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fi
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# Try i3-msg to focus something
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log_message "Using i3-msg to focus workspace..."
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DISPLAY=:0 i3-msg workspace number 1 >/dev/null 2>&1
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sleep 0.5
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DISPLAY=:0 i3-msg focus output primary >/dev/null 2>&1
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sleep 1
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# Check if focus is actually fixed now
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if DISPLAY=:0 timeout 1 xdotool getwindowfocus >/dev/null 2>&1; then
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log_message "Focus recovery successful!"
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else
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log_message "Focus still broken - restarting i3..."
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DISPLAY=:0 i3-msg -t run_command restart
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log_message "Restart command sent"
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fi
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# Wait for restart to complete
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sleep 5
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# Reset counters
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lastSuccessTime=$(date +%s)
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consecutiveFailures=0
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fi
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fi
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done
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@@ -50,13 +50,20 @@ def on_new_window(self,i3):
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def on_close_window(self,i3):
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try:
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windowName = getattr(i3.container, 'name', None)
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windowClass = getattr(i3.container, 'window_class', None)
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# Get container early - if this fails, bail immediately
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container = getattr(i3, 'container', None)
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if container is None:
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return
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# Fast checks with immediate bailout on any issue
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windowName = getattr(container, 'name', None)
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windowClass = getattr(container, 'window_class', None)
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# Skip sound only for notification daemon (it has its own sound)
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if windowName != 'xfce4-notifyd' and windowClass != 'xfce4-notifyd':
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play_sound_async('play -nqV0 synth .25 sin 880:440 sin 920:480 remix - norm -3 pitch -500')
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except Exception:
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# Silently ignore errors to prevent blocking i3
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# Silently ignore any errors - better no sound than blocking i3
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pass
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def on_mode(self,event):
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