Index: head/sys/dev/acpica/acpi_hpet.c
===================================================================
--- head/sys/dev/acpica/acpi_hpet.c
+++ head/sys/dev/acpica/acpi_hpet.c
@@ -62,6 +62,7 @@
 
 #define HPET_VENDID_AMD		0x4353
 #define HPET_VENDID_AMD2	0x1022
+#define HPET_VENDID_HYGON	0x1d94
 #define HPET_VENDID_INTEL	0x8086
 #define HPET_VENDID_NVIDIA	0x10de
 #define HPET_VENDID_SW		0x1166
@@ -606,7 +607,8 @@
 	 * properly, that makes it very unreliable - it freezes after any
 	 * interrupt loss. Avoid legacy IRQs for AMD.
 	 */
-	if (vendor == HPET_VENDID_AMD || vendor == HPET_VENDID_AMD2)
+	if (vendor == HPET_VENDID_AMD || vendor == HPET_VENDID_AMD2 ||
+	    vendor == HPET_VENDID_HYGON)
 		sc->allowed_irqs = 0x00000000;
 	/*
 	 * NVidia MCP5x chipsets have number of unexplained interrupt