I see this on an Lenovo X1 Gen1. $ uname -a Linux lt0972 4.10.0-9-generic #11-Ubuntu SMP Mon Feb 20 13:47:35 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Mar 8 10:11:47 lt0972 kernel: [ 18.938412] iwlwifi 0000:03:00.0: Error sending REPLY_SCAN_ABORT_CMD: time out after 2000ms. Mar 8 10:11:47 lt0972 kernel: [ 18.938421] iwlwifi 0000:03:00.0: Current CMD queue read_ptr 30 write_ptr 31 Mar 8 10:11:47 lt0972 kernel: [ 18.938504] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1 Mar 8 10:11:47 lt0972 kernel: [ 18.938903] iwlwifi 0000:03:00.0: Start IWL Error Log Dump: Mar 8 10:11:47 lt0972 kernel: [ 18.938907] iwlwifi 0000:03:00.0: Status: 0x000003CC, count: 6 Mar 8 10:11:47 lt0972 kernel: [ 18.938911] iwlwifi 0000:03:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN Mar 8 10:11:47 lt0972 kernel: [ 18.938914] iwlwifi 0000:03:00.0: 0x00010050 | uPc Mar 8 10:11:47 lt0972 kernel: [ 18.938917] iwlwifi 0000:03:00.0: 0x0001001E | branchlink1 Mar 8 10:11:47 lt0972 kernel: [ 18.938919] iwlwifi 0000:03:00.0: 0x00010090 | branchlink2 Mar 8 10:11:47 lt0972 kernel: [ 18.938922] iwlwifi 0000:03:00.0: 0x0000D6BE | interruptlink1 Mar 8 10:11:47 lt0972 kernel: [ 18.938925] iwlwifi 0000:03:00.0: 0x00011DB8 | interruptlink2 Mar 8 10:11:47 lt0972 kernel: [ 18.938928] iwlwifi 0000:03:00.0: 0x00000081 | data1 Mar 8 10:11:47 lt0972 kernel: [ 18.938930] iwlwifi 0000:03:00.0: 0x07030000 | data2 Mar 8 10:11:47 lt0972 kernel: [ 18.938933] iwlwifi 0000:03:00.0: 0x000000F1 | line Mar 8 10:11:47 lt0972 kernel: [ 18.938936] iwlwifi 0000:03:00.0: 0x0D00D8CB | beacon time Mar 8 10:11:47 lt0972 kernel: [ 18.938939] iwlwifi 0000:03:00.0: 0x0051F735 | tsf low Mar 8 10:11:47 lt0972 kernel: [ 18.938942] iwlwifi 0000:03:00.0: 0x00000000 | tsf hi Mar 8 10:11:47 lt0972 kernel: [ 18.938944] iwlwifi 0000:03:00.0: 0x00000000 | time gp1 Mar 8 10:11:47 lt0972 kernel: [ 18.938947] iwlwifi 0000:03:00.0: 0x005C0F5E | time gp2 Mar 8 10:11:47 lt0972 kernel: [ 18.938950] iwlwifi 0000:03:00.0: 0x00000000 | time gp3 Mar 8 10:11:47 lt0972 kernel: [ 18.938953] iwlwifi 0000:03:00.0: 0x754312A8 | uCode version Mar 8 10:11:47 lt0972 kernel: [ 18.938955] iwlwifi 0000:03:00.0: 0x000000B0 | hw version Mar 8 10:11:47 lt0972 kernel: [ 18.938958] iwlwifi 0000:03:00.0: 0x00488700 | board version Mar 8 10:11:47 lt0972 kernel: [ 18.938961] iwlwifi 0000:03:00.0: 0x0000001C | hcmd Mar 8 10:11:47 lt0972 kernel: [ 18.938963] iwlwifi 0000:03:00.0: 0x27863040 | isr0 Mar 8 10:11:47 lt0972 kernel: [ 18.938966] iwlwifi 0000:03:00.0: 0x0101E000 | isr1 Mar 8 10:11:47 lt0972 kernel: [ 18.938969] iwlwifi 0000:03:00.0: 0x00000E02 | isr2 Mar 8 10:11:47 lt0972 kernel: [ 18.938971] iwlwifi 0000:03:00.0: 0x0143FCC3 | isr3 Mar 8 10:11:47 lt0972 kernel: [ 18.938974] iwlwifi 0000:03:00.0: 0x00000000 | isr4 Mar 8 10:11:47 lt0972 kernel: [ 18.938977] iwlwifi 0000:03:00.0: 0x00000110 | isr_pref Mar 8 10:11:47 lt0972 kernel: [ 18.938979] iwlwifi 0000:03:00.0: 0x000000F1 | wait_event Mar 8 10:11:47 lt0972 kernel: [ 18.938982] iwlwifi 0000:03:00.0: 0x000000D4 | l2p_control Mar 8 10:11:47 lt0972 kernel: [ 18.938985] iwlwifi 0000:03:00.0: 0x00000000 | l2p_duration Mar 8 10:11:47 lt0972 kernel: [ 18.938987] iwlwifi 0000:03:00.0: 0x00000007 | l2p_mhvalid Mar 8 10:11:47 lt0972 kernel: [ 18.938990] iwlwifi 0000:03:00.0: 0x00000000 | l2p_addr_match Mar 8 10:11:47 lt0972 kernel: [ 18.938993] iwlwifi 0000:03:00.0: 0x00000005 | lmpm_pmg_sel Mar 8 10:11:47 lt0972 kernel: [ 18.938996] iwlwifi 0000:03:00.0: 0x06061222 | timestamp Mar 8 10:11:47 lt0972 kernel: [ 18.938998] iwlwifi 0000:03:00.0: 0x00004050 | flow_handler Mar 8 10:11:47 lt0972 kernel: [ 18.939173] iwlwifi 0000:03:00.0: Start IWL Event Log Dump: display last 1 entries Mar 8 10:11:47 lt0972 kernel: [ 18.939239] iwlwifi 0000:03:00.0: EVT_LOGT:0006033242:0x0000010c:0123 Mar 8 10:11:47 lt0972 kernel: [ 18.939281] iwlwifi 0000:03:00.0: Command REPLY_RXON failed: FW Error Mar 8 10:11:47 lt0972 kernel: [ 18.939286] iwlwifi 0000:03:00.0: Error clearing ASSOC_MSK on BSS (-5) Mar 8 10:11:47 lt0972 kernel: [ 18.939331] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000. Mar 8 10:11:47 lt0972 kernel: [ 18.939350] iwlwifi 0000:03:00.0: CSR values: Mar 8 10:11:47 lt0972 kernel: [ 18.939353] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG) Mar 8 10:11:47 lt0972 kernel: [ 18.939393] iwlwifi 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00488700 Mar 8 10:11:47 lt0972 kernel: [ 18.939411] iwlwifi 0000:03:00.0: CSR_INT_COALESCING: 0X00000040 Mar 8 10:11:47 lt0972 kernel: [ 18.939459] iwlwifi 0000:03:00.0: CSR_INT: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939548] iwlwifi 0000:03:00.0: CSR_INT_MASK: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939567] iwlwifi 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939614] iwlwifi 0000:03:00.0: CSR_GPIO_IN: 0X00000030 Mar 8 10:11:47 lt0972 kernel: [ 18.939655] iwlwifi 0000:03:00.0: CSR_RESET: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939674] iwlwifi 0000:03:00.0: CSR_GP_CNTRL: 0X080403cd Mar 8 10:11:47 lt0972 kernel: [ 18.939692] iwlwifi 0000:03:00.0: CSR_HW_REV: 0X000000b0 Mar 8 10:11:47 lt0972 kernel: [ 18.939711] iwlwifi 0000:03:00.0: CSR_EEPROM_REG: 0X17550ffd Mar 8 10:11:47 lt0972 kernel: [ 18.939727] iwlwifi 0000:03:00.0: CSR_EEPROM_GP: 0X90000001 Mar 8 10:11:47 lt0972 kernel: [ 18.939745] iwlwifi 0000:03:00.0: CSR_OTP_GP_REG: 0X00030001 Mar 8 10:11:47 lt0972 kernel: [ 18.939764] iwlwifi 0000:03:00.0: CSR_GIO_REG: 0X00080042 Mar 8 10:11:47 lt0972 kernel: [ 18.939783] iwlwifi 0000:03:00.0: CSR_GP_UCODE_REG: 0X000005af Mar 8 10:11:47 lt0972 kernel: [ 18.939805] iwlwifi 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939828] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939861] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939894] iwlwifi 0000:03:00.0: CSR_LED_REG: 0X00000018 Mar 8 10:11:47 lt0972 kernel: [ 18.939927] iwlwifi 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.939955] iwlwifi 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200 Mar 8 10:11:47 lt0972 kernel: [ 18.939982] iwlwifi 0000:03:00.0: CSR_ANA_PLL_CFG: 0X00000000 Mar 8 10:11:47 lt0972 kernel: [ 18.940010] iwlwifi 0000:03:00.0: CSR_MONITOR_STATUS_REG: 0X2bf7f71f Mar 8 10:11:47 lt0972 kernel: [ 18.940038] iwlwifi 0000:03:00.0: CSR_HW_REV_WA_REG: 0X0001001a Mar 8 10:11:47 lt0972 kernel: [ 18.940065] iwlwifi 0000:03:00.0: CSR_DBG_HPET_MEM_REG: 0X82000500 Mar 8 10:11:47 lt0972 kernel: [ 18.940069] iwlwifi 0000:03:00.0: FH register values: