kernel 3.19 (86_64) backported iwlwifi drivers driver fail to boot AX200. I tried build same backported driver on kernel 4.4 and it worked. However , when built on top 3.19 kernel it never boot. From the log, seems drivers can't wake up AX200. Any idea from the log what might be the cause? thanks arith [ 260.012724] iwlwifi-stack-public:master:8042:654c426c [ 267.028819] cfg80211: Loading compiled-in X.509 certificates for regulatory database [ 267.056810] platform regulatory.0: Direct firmware load for regulatory.db.p7s failed with error -2 [ 267.056812] cfg80211: loaded regulatory.db is malformed or signature is missing/invalid [ 279.662675] Intel(R) Wireless WiFi driver for Linux [ 279.662676] Copyright(c) 2003- 2015 Intel Corporation [ 279.706392] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 [ 279.737154] iwlwifi 0000:00:05.0: Direct firmware load for iwl-dbg-cfg.ini failed with error -2 [ 279.737370] iwlwifi 0000:00:05.0: Direct firmware load for iwlwifi-cc-a0-52.ucode failed with error -2 [ 279.737381] iwlwifi 0000:00:05.0: Direct firmware load for iwlwifi-cc-a0-51.ucode failed with error -2 [ 279.737387] iwlwifi 0000:00:05.0: Direct firmware load for iwlwifi-cc-a0-50.ucode failed with error -2 [ 279.737393] iwlwifi 0000:00:05.0: Direct firmware load for iwlwifi-cc-a0-49.ucode failed with error -2 [ 279.765442] iwlwifi 0000:00:05.0: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17 [ 279.765446] iwlwifi 0000:00:05.0: Found debug destination: EXTERNAL_DRAM [ 279.765448] iwlwifi 0000:00:05.0: Found debug configuration: 0 [ 279.765631] iwlwifi 0000:00:05.0: loaded firmware version 48.4fa0041f.0 op_mode iwlmvm [ 287.008123] iwlwifi 0000:00:05.0: Detected Intel(R) Wi-Fi 6 AX200 160MHz, REV=0x340 [ 287.019306] iwlwifi 0000:00:05.0: Applying debug destination EXTERNAL_DRAM [ 287.019479] iwlwifi 0000:00:05.0: Allocated 0x00400000 bytes for firmware monitor. [ 288.019111] iwlwifi 0000:00:05.0: Collecting data: trigger 16 fired. [ 288.269652] iwlwifi 0000:00:05.0: Start IWL Error Log Dump: [ 288.269654] iwlwifi 0000:00:05.0: Status: 0x00000000, count: 6 [ 288.269655] iwlwifi 0000:00:05.0: Loaded firmware version: 48.4fa0041f.0 [ 288.269657] iwlwifi 0000:00:05.0: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL [ 288.269658] iwlwifi 0000:00:05.0: 0x002022F0 | trm_hw_status0 [ 288.269659] iwlwifi 0000:00:05.0: 0x00000000 | trm_hw_status1 [ 288.269660] iwlwifi 0000:00:05.0: 0x004F8E3C | branchlink2 [ 288.269661] iwlwifi 0000:00:05.0: 0x004E4FF4 | interruptlink1 [ 288.269661] iwlwifi 0000:00:05.0: 0x004E4FF4 | interruptlink2 [ 288.269662] iwlwifi 0000:00:05.0: 0x004F3DB0 | data1 [ 288.269663] iwlwifi 0000:00:05.0: 0x00001000 | data2 [ 288.269664] iwlwifi 0000:00:05.0: 0xF0000000 | data3 [ 288.269665] iwlwifi 0000:00:05.0: 0x00000000 | beacon time [ 288.269666] iwlwifi 0000:00:05.0: 0x00008C99 | tsf low [ 288.269667] iwlwifi 0000:00:05.0: 0x00000000 | tsf hi [ 288.269668] iwlwifi 0000:00:05.0: 0x00000000 | time gp1 [ 288.269669] iwlwifi 0000:00:05.0: 0x0000F036 | time gp2 [ 288.269669] iwlwifi 0000:00:05.0: 0x00000001 | uCode revision type [ 288.269670] iwlwifi 0000:00:05.0: 0x00000030 | uCode version major [ 288.269671] iwlwifi 0000:00:05.0: 0x4FA0041F | uCode version minor [ 288.269672] iwlwifi 0000:00:05.0: 0x00000340 | hw version [ 288.269673] iwlwifi 0000:00:05.0: 0x00C89000 | board version [ 288.269674] iwlwifi 0000:00:05.0: 0x8002FF03 | hcmd [ 288.269675] iwlwifi 0000:00:05.0: 0x00020000 | isr0 [ 288.269676] iwlwifi 0000:00:05.0: 0x00000000 | isr1 [ 288.269677] iwlwifi 0000:00:05.0: 0x08F00002 | isr2 [ 288.269678] iwlwifi 0000:00:05.0: 0x00C0000C | isr3 [ 288.269679] iwlwifi 0000:00:05.0: 0x00000000 | isr4 [ 288.269680] iwlwifi 0000:00:05.0: 0x00000000 | last cmd Id [ 288.269681] iwlwifi 0000:00:05.0: 0x004F3DB0 | wait_event [ 288.269682] iwlwifi 0000:00:05.0: 0x00000000 | l2p_control [ 288.269682] iwlwifi 0000:00:05.0: 0x00000020 | l2p_duration [ 288.269683] iwlwifi 0000:00:05.0: 0x00000000 | l2p_mhvalid [ 288.269684] iwlwifi 0000:00:05.0: 0x00000000 | l2p_addr_match [ 288.269685] iwlwifi 0000:00:05.0: 0x00000009 | lmpm_pmg_sel [ 288.269686] iwlwifi 0000:00:05.0: 0x00000000 | timestamp [ 288.269687] iwlwifi 0000:00:05.0: 0x00000000 | flow_handler [ 288.269716] iwlwifi 0000:00:05.0: Start IWL Error Log Dump: [ 288.269717] iwlwifi 0000:00:05.0: Status: 0x00000000, count: 7 [ 288.269718] iwlwifi 0000:00:05.0: 0x201000A3 | ADVANCED_SYSASSERT [ 288.269719] iwlwifi 0000:00:05.0: 0x00000000 | umac branchlink1 [ 288.269720] iwlwifi 0000:00:05.0: 0xC008CC3C | umac branchlink2 [ 288.269721] iwlwifi 0000:00:05.0: 0xC0087660 | umac interruptlink1 [ 288.269722] iwlwifi 0000:00:05.0: 0x00000000 | umac interruptlink2 [ 288.269723] iwlwifi 0000:00:05.0: 0xDEADBEEF | umac data1 [ 288.269724] iwlwifi 0000:00:05.0: 0xDEADBEEF | umac data2 [ 288.269725] iwlwifi 0000:00:05.0: 0xDEADBEEF | umac data3 [ 288.269726] iwlwifi 0000:00:05.0: 0x00000030 | umac major [ 288.269727] iwlwifi 0000:00:05.0: 0x4FA0041F | umac minor [ 288.269727] iwlwifi 0000:00:05.0: 0x0000F02A | frame pointer [ 288.269728] iwlwifi 0000:00:05.0: 0xC0886C1C | stack pointer [ 288.269729] iwlwifi 0000:00:05.0: 0x0000FFFF | last host cmd [ 288.269730] iwlwifi 0000:00:05.0: 0x00000000 | isr status reg [ 288.269736] iwlwifi 0000:00:05.0: Fseq Registers: [ 288.269739] iwlwifi 0000:00:05.0: 0x20000000 | FSEQ_ERROR_CODE [ 288.269742] iwlwifi 0000:00:05.0: 0x80290001 | FSEQ_TOP_INIT_VERSION [ 288.269745] iwlwifi 0000:00:05.0: 0x80050008 | FSEQ_CNVIO_INIT_VERSION [ 288.269748] iwlwifi 0000:00:05.0: 0x0000A503 | FSEQ_OTP_VERSION [ 288.269751] iwlwifi 0000:00:05.0: 0x80000003 | FSEQ_TOP_CONTENT_VERSION [ 288.269754] iwlwifi 0000:00:05.0: 0x4552414E | FSEQ_ALIVE_TOKEN [ 288.269757] iwlwifi 0000:00:05.0: 0x00100530 | FSEQ_CNVI_ID [ 288.269760] iwlwifi 0000:00:05.0: 0x00000532 | FSEQ_CNVR_ID [ 288.269763] iwlwifi 0000:00:05.0: 0x00100530 | CNVI_AUX_MISC_CHIP [ 288.269768] iwlwifi 0000:00:05.0: 0x00000532 | CNVR_AUX_MISC_CHIP [ 288.269773] iwlwifi 0000:00:05.0: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM [ 288.269778] iwlwifi 0000:00:05.0: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR [ 288.269798] iwlwifi 0000:00:05.0: SecBoot CPU1 Status: 0x619c, CPU2 Status: 0x3 [ 288.269799] iwlwifi 0000:00:05.0: Failed to start RT ucode: -110 [ 288.715639] iwlwifi 0000:00:05.0: Failed to run INIT ucode: -110
*** This bug has been marked as a duplicate of bug 205123 ***