I still experience this bug in firmware 18.168.6.1 which ships in latest sid.
My card is: Intel Wireless 6005/6205 firmware, version 18.168.6.1 (iwlwifi-6000g2a-6.ucode) [155772.452945] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000. [155772.452961] iwlwifi 0000:03:00.0: CSR values: [155772.452963] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG) [155772.452993] iwlwifi 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00488700 [155772.453019] iwlwifi 0000:03:00.0: CSR_INT_COALESCING: 0X0000ff40 [155772.453045] iwlwifi 0000:03:00.0: CSR_INT: 0X00000000 [155772.453071] iwlwifi 0000:03:00.0: CSR_INT_MASK: 0X00000000 [155772.453097] iwlwifi 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000 [155772.453123] iwlwifi 0000:03:00.0: CSR_GPIO_IN: 0X00000030 [155772.453149] iwlwifi 0000:03:00.0: CSR_RESET: 0X00000000 [155772.453174] iwlwifi 0000:03:00.0: CSR_GP_CNTRL: 0X080403c5 [155772.453200] iwlwifi 0000:03:00.0: CSR_HW_REV: 0X000000b0 [155772.453226] iwlwifi 0000:03:00.0: CSR_EEPROM_REG: 0Xb4440ffd [155772.453252] iwlwifi 0000:03:00.0: CSR_EEPROM_GP: 0X90000001 [155772.453278] iwlwifi 0000:03:00.0: CSR_OTP_GP_REG: 0X00030001 [155772.453304] iwlwifi 0000:03:00.0: CSR_GIO_REG: 0X00080042 [155772.453330] iwlwifi 0000:03:00.0: CSR_GP_UCODE_REG: 0X0000026f [155772.453356] iwlwifi 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000 [155772.453382] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000 [155772.453409] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000 [155772.453435] iwlwifi 0000:03:00.0: CSR_LED_REG: 0X00000040 [155772.453462] iwlwifi 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X8828c7fd [155772.453489] iwlwifi 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200 [155772.453515] iwlwifi 0000:03:00.0: CSR_ANA_PLL_CFG: 0X00000000 [155772.453541] iwlwifi 0000:03:00.0: CSR_MONITOR_STATUS_REG: 0X6bf7f757 [155772.453568] iwlwifi 0000:03:00.0: CSR_HW_REV_WA_REG: 0X0001001a [155772.453594] iwlwifi 0000:03:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0000 [155772.453596] iwlwifi 0000:03:00.0: FH register values: [155772.453634] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X28bbb700 [155772.453656] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X02907d60 [155772.453678] iwlwifi 0000:03:00.0: FH_RSCSR_CHNL0_WPTR: 0X00000040 [155772.453701] iwlwifi 0000:03:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80801114 [155772.453728] iwlwifi 0000:03:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc [155772.453772] iwlwifi 0000:03:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X07030000 [155772.453795] iwlwifi 0000:03:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000 [155772.453822] iwlwifi 0000:03:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0001 [155772.453845] iwlwifi 0000:03:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000 [155772.453848] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1 [155772.454009] iwlwifi 0000:03:00.0: Start IWL Error Log Dump: [155772.454012] iwlwifi 0000:03:00.0: Status: 0x000002CC, count: 6 [155772.454014] iwlwifi 0000:03:00.0: 0x000014E1 | ADVANCED_SYSASSERT [155772.454016] iwlwifi 0000:03:00.0: 0x00017144 | uPc [155772.454018] iwlwifi 0000:03:00.0: 0x000171AC | branchlink1 [155772.454020] iwlwifi 0000:03:00.0: 0x000171AC | branchlink2 [155772.454022] iwlwifi 0000:03:00.0: 0x0000D6BE | interruptlink1 [155772.454023] iwlwifi 0000:03:00.0: 0x00000000 | interruptlink2 [155772.454025] iwlwifi 0000:03:00.0: 0x00000000 | data1 [155772.454027] iwlwifi 0000:03:00.0: 0x00000000 | data2 [155772.454028] iwlwifi 0000:03:00.0: 0x000000A2 | line [155772.454030] iwlwifi 0000:03:00.0: 0x0500C839 | beacon time [155772.454032] iwlwifi 0000:03:00.0: 0x002007C7 | tsf low [155772.454033] iwlwifi 0000:03:00.0: 0x00000000 | tsf hi [155772.454035] iwlwifi 0000:03:00.0: 0x00000000 | time gp1 [155772.454037] iwlwifi 0000:03:00.0: 0x00213537 | time gp2 [155772.454038] iwlwifi 0000:03:00.0: 0x00000000 | time gp3 [155772.454040] iwlwifi 0000:03:00.0: 0x754312A8 | uCode version [155772.454042] iwlwifi 0000:03:00.0: 0x000000B0 | hw version [155772.454044] iwlwifi 0000:03:00.0: 0x00488700 | board version [155772.454045] iwlwifi 0000:03:00.0: 0x0000001C | hcmd [155772.454047] iwlwifi 0000:03:00.0: 0x27863040 | isr0 [155772.454048] iwlwifi 0000:03:00.0: 0x11004000 | isr1 [155772.454050] iwlwifi 0000:03:00.0: 0x00000E02 | isr2 [155772.454052] iwlwifi 0000:03:00.0: 0x01451CC2 | isr3 [155772.454054] iwlwifi 0000:03:00.0: 0x00000000 | isr4 [155772.454055] iwlwifi 0000:03:00.0: 0x00080110 | isr_pref [155772.454057] iwlwifi 0000:03:00.0: 0x00000272 | wait_event [155772.454059] iwlwifi 0000:03:00.0: 0x00000288 | l2p_control [155772.454061] iwlwifi 0000:03:00.0: 0x0000002C | l2p_duration [155772.454062] iwlwifi 0000:03:00.0: 0x000000BF | l2p_mhvalid [155772.454064] iwlwifi 0000:03:00.0: 0x00000000 | l2p_addr_match [155772.454065] iwlwifi 0000:03:00.0: 0x00000005 | lmpm_pmg_sel [155772.454067] iwlwifi 0000:03:00.0: 0x06061222 | timestamp [155772.454069] iwlwifi 0000:03:00.0: 0x00003850 | flow_handler [155772.454155] iwlwifi 0000:03:00.0: Start IWL Event Log Dump: nothing in log -- Eric