stat &= ~0x00000010;
        }
 
+       if (stat & 0x00000020) {
+               NV_INFO(dev, "PGRAPH: ILLEGAL_CLASS ch %d [0x%010llx] subc %d "
+                            "class 0x%04x mthd 0x%04x data 0x%08x\n",
+                       chid, inst, subc, class, mthd, data);
+               nv_wr32(dev, 0x400100, 0x00000020);
+               stat &= ~0x00000020;
+       }
+
        if (stat & 0x00100000) {
                NV_INFO(dev, "PGRAPH: DATA_ERROR [");
                nouveau_enum_print(nvc0_graph_data_error, code);
                stat &= ~0x00100000;
        }
 
+       if (stat & 0x00200000) {
+               u32 trap = nv_rd32(dev, 0x400108);
+               NV_INFO(dev, "PGRAPH: TRAP ch %d status 0x%08x\n", chid, trap);
+               nv_wr32(dev, 0x400108, trap);
+               nv_wr32(dev, 0x400100, 0x00200000);
+               stat &= ~0x00200000;
+       }
+
        if (stat & 0x00080000) {
                u32 ustat = nv_rd32(dev, 0x409c18);