diff --git a/jupiter/configuration.nix b/jupiter/configuration.nix
index fea0d17..cc54544 100644
--- a/jupiter/configuration.nix
+++ b/jupiter/configuration.nix
@@ -23,6 +23,11 @@
   # laptop-built (unsigned) closure without a signature error.
   nix.settings.trusted-users = [ "root" "@wheel" ];
 
+  # Warm reboot hangs at firmware reset on this board (cold power-cycle works).
+  # Force the PCI-chipset reset method. If a warm `reboot` still hangs, try the
+  # next value: acpi -> bios -> cold -> efi.
+  boot.kernelParams = [ "reboot=pci" ];
+
   # ---- NAS data array ----
   # Existing ext4 on the mdadm RAID0 over sda+sdb (md0, 29.1T).
   # Mounted, NOT formatted; kept out of disko so it is never wiped.