diff --git a/deploy/nixos/hardware/batm3.nix b/deploy/nixos/hardware/batm3.nix
index 40983c9..1d6af0b 100644
--- a/deploy/nixos/hardware/batm3.nix
+++ b/deploy/nixos/hardware/batm3.nix
@@ -173,6 +173,13 @@
     SUBSYSTEM=="tty", ATTRS{serial}=="A9YW78OC", SYMLINK+="ttyMEI", MODE="0666"
     SUBSYSTEM=="tty", ATTRS{serial}=="A9ZF8ELY", SYMLINK+="ttyNFC", MODE="0666"
     ACTION=="add", SUBSYSTEM=="usb", ATTRS{idVendor}=="0eef", ATTRS{idProduct}=="0001", RUN+="${pkgs.bash}/bin/bash -c '${pkgs.kmod}/bin/modprobe usbtouchscreen 2>/dev/null; echo ''$kernel:1.0 > /sys/bus/usb/drivers/usbhid/unbind 2>/dev/null; echo 0eef 0001 > /sys/bus/usb/drivers/usbtouchscreen/new_id 2>/dev/null'"
+    # Belt-and-suspenders for touch calibration: on a slow USB boot the
+    # usbtouchscreen panel can bind AFTER egalax-calibrate's poll window, which
+    # leaves the panel uncalibrated and unresponsive ("dead"). (Re)start the
+    # calibration the instant the eGalax input node actually appears — this is
+    # device-driven, so it cannot lose a boot-timing race no matter how late the
+    # driver hands over. Pairs with egalax-calibrate's own (widened) poll loop.
+    ACTION=="add", SUBSYSTEM=="input", KERNEL=="event*", ATTRS{name}=="eGalax Inc. USB TouchController", TAG+="systemd", ENV{SYSTEMD_WANTS}+="egalax-calibrate.service"
   '';
 
   # Force the X evdev driver on the eGalax (not libinput). The usbtouchscreen
@@ -211,17 +218,21 @@
       Environment = [ "DISPLAY=:0" "XAUTHORITY=/home/bitspire/.Xauthority" ];
       # Wait for the eGalax X device to appear (usbtouchscreen binds a little
       # after display-manager on a USB boot) and retry, instead of a fixed
-      # sleep — more robust to boot timing. Matrix: swap X/Y + invert + scale
-      # to the active panel area (matches the known-good internal install).
+      # sleep — more robust to boot timing. 120s window: on a slow USB boot the
+      # panel has bound as late as ~30-60s after display-manager, so a 30s cap
+      # gave up before the device appeared and left touch dead (this service is
+      # ALSO re-triggered by a udev rule when the input node shows up, so this
+      # loop is the fallback, not the only path). Matrix: swap X/Y + invert +
+      # scale to the active panel area (matches the known-good internal install).
       ExecStart = pkgs.writeShellScript "egalax-calibrate" ''
-        for i in $(${pkgs.coreutils}/bin/seq 1 30); do
+        for i in $(${pkgs.coreutils}/bin/seq 1 120); do
           if ${pkgs.xorg.xinput}/bin/xinput list --name-only 2>/dev/null | ${pkgs.gnugrep}/bin/grep -qx 'eGalax Inc. USB TouchController'; then
             exec ${pkgs.xorg.xinput}/bin/xinput set-prop 'eGalax Inc. USB TouchController' \
               'Coordinate Transformation Matrix' 0 -1.268 1.147 -1.224 0 1.118 0 0 1
           fi
           ${pkgs.coreutils}/bin/sleep 1
         done
-        echo "egalax-calibrate: eGalax device not found after 30s" >&2
+        echo "egalax-calibrate: eGalax device not found after 120s" >&2
         exit 1
       '';
     };