Take a look at LP: #1694547. Probably same issue?
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https://bugs.launchpad.net/bugs/1693618
Title:
Microcode SW error detected.
Status in linux-firmware package in Ubuntu:
Incomplete
Bug description:
In dmesg logs I see
[81251.363118] iwlwifi 0000:04:00.0: regular scan timed out
[81251.363235] iwlwifi 0000:04:00.0: Microcode SW error detected. Restarting
0x2000000.
[81251.363241] iwlwifi 0000:04:00.0: CSR values:
[81251.363244] iwlwifi 0000:04:00.0: (2nd byte of CSR_INT_COALESCING is
CSR_INT_PERIODIC_REG)
[81251.363250] iwlwifi 0000:04:00.0: CSR_HW_IF_CONFIG_REG: 0X00c89008
[81251.363256] iwlwifi 0000:04:00.0: CSR_INT_COALESCING: 0X00000040
[81251.363261] iwlwifi 0000:04:00.0: CSR_INT: 0X00000000
[81251.363266] iwlwifi 0000:04:00.0: CSR_INT_MASK: 0X00000000
[81251.363271] iwlwifi 0000:04:00.0: CSR_FH_INT_STATUS: 0X00000000
[81251.363276] iwlwifi 0000:04:00.0: CSR_GPIO_IN: 0X00000019
[81251.363281] iwlwifi 0000:04:00.0: CSR_RESET: 0X00000000
[81251.363286] iwlwifi 0000:04:00.0: CSR_GP_CNTRL: 0X08040005
[81251.363292] iwlwifi 0000:04:00.0: CSR_HW_REV: 0X00000201
[81251.363296] iwlwifi 0000:04:00.0: CSR_EEPROM_REG: 0Xd55555d5
[81251.363302] iwlwifi 0000:04:00.0: CSR_EEPROM_GP: 0Xd55555d5
[81251.363306] iwlwifi 0000:04:00.0: CSR_OTP_GP_REG: 0Xd55555d5
[81251.363311] iwlwifi 0000:04:00.0: CSR_GIO_REG: 0X001f0044
[81251.363316] iwlwifi 0000:04:00.0: CSR_GP_UCODE_REG: 0X00000000
[81251.363321] iwlwifi 0000:04:00.0: CSR_GP_DRIVER_REG: 0X00000000
[81251.363326] iwlwifi 0000:04:00.0: CSR_UCODE_DRV_GP1: 0X00000000
[81251.363331] iwlwifi 0000:04:00.0: CSR_UCODE_DRV_GP2: 0X00000000
[81251.363336] iwlwifi 0000:04:00.0: CSR_LED_REG: 0X00000060
[81251.363341] iwlwifi 0000:04:00.0: CSR_DRAM_INT_TBL_REG: 0X8884993d
[81251.363346] iwlwifi 0000:04:00.0: CSR_GIO_CHICKEN_BITS: 0X07800200
[81251.363351] iwlwifi 0000:04:00.0: CSR_ANA_PLL_CFG: 0Xd55555d5
[81251.363356] iwlwifi 0000:04:00.0: CSR_MONITOR_STATUS_REG: 0Xc03803c0
[81251.363361] iwlwifi 0000:04:00.0: CSR_HW_REV_WA_REG: 0X0001001a
[81251.363366] iwlwifi 0000:04:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0010
[81251.363369] iwlwifi 0000:04:00.0: FH register values:
[81251.363384] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG:
0X848c7800
[81251.363398] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG:
0X0848c080
[81251.363413] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_WPTR:
0X000000f0
[81251.363427] iwlwifi 0000:04:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG:
0X00801054
[81251.363442] iwlwifi 0000:04:00.0: FH_MEM_RSSR_SHARED_CTRL_REG:
0X000000fc
[81251.363456] iwlwifi 0000:04:00.0: FH_MEM_RSSR_RX_STATUS_REG:
0X03030000
[81251.363471] iwlwifi 0000:04:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV:
0X00000000
[81251.363486] iwlwifi 0000:04:00.0: FH_TSSR_TX_STATUS_REG:
0X07ff0000
[81251.363500] iwlwifi 0000:04:00.0: FH_TSSR_TX_ERROR_REG:
0X00000000
[81251.363612] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
[81251.363615] iwlwifi 0000:04:00.0: Status: 0x00000000, count: 6
[81251.363618] iwlwifi 0000:04:00.0: Loaded firmware version: 21.302800.0
[81251.363622] iwlwifi 0000:04:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN
[81251.363624] iwlwifi 0000:04:00.0: 0x000006F4 | trm_hw_status0
[81251.363627] iwlwifi 0000:04:00.0: 0x00000000 | trm_hw_status1
[81251.363630] iwlwifi 0000:04:00.0: 0x00000BD8 | branchlink2
[81251.363632] iwlwifi 0000:04:00.0: 0x00026AC4 | interruptlink1
[81251.363635] iwlwifi 0000:04:00.0: 0x00026AC4 | interruptlink2
[81251.363637] iwlwifi 0000:04:00.0: 0x00000000 | data1
[81251.363640] iwlwifi 0000:04:00.0: 0x00000080 | data2
[81251.363642] iwlwifi 0000:04:00.0: 0x07830000 | data3
[81251.363645] iwlwifi 0000:04:00.0: 0x7800010C | beacon time
[81251.363647] iwlwifi 0000:04:00.0: 0xF129DEEA | tsf low
[81251.363650] iwlwifi 0000:04:00.0: 0x00000077 | tsf hi
[81251.363653] iwlwifi 0000:04:00.0: 0x00000000 | time gp1
[81251.363655] iwlwifi 0000:04:00.0: 0xEA60BCC9 | time gp2
[81251.363658] iwlwifi 0000:04:00.0: 0x00000000 | uCode revision type
[81251.363660] iwlwifi 0000:04:00.0: 0x00000015 | uCode version major
[81251.363663] iwlwifi 0000:04:00.0: 0x00049ED0 | uCode version minor
[81251.363665] iwlwifi 0000:04:00.0: 0x00000201 | hw version
[81251.363668] iwlwifi 0000:04:00.0: 0x00C89008 | board version
[81251.363671] iwlwifi 0000:04:00.0: 0x09270400 | hcmd
[81251.363673] iwlwifi 0000:04:00.0: 0x80022000 | isr0
[81251.363676] iwlwifi 0000:04:00.0: 0x00800000 | isr1
[81251.363678] iwlwifi 0000:04:00.0: 0x08001802 | isr2
[81251.363681] iwlwifi 0000:04:00.0: 0x00417CC4 | isr3
[81251.363683] iwlwifi 0000:04:00.0: 0x00000000 | isr4
[81251.363686] iwlwifi 0000:04:00.0: 0x00000110 | last cmd Id
[81251.363688] iwlwifi 0000:04:00.0: 0x00000000 | wait_event
[81251.363691] iwlwifi 0000:04:00.0: 0x0000B397 | l2p_control
[81251.363693] iwlwifi 0000:04:00.0: 0x00000020 | l2p_duration
[81251.363696] iwlwifi 0000:04:00.0: 0x00000000 | l2p_mhvalid
[81251.363698] iwlwifi 0000:04:00.0: 0x00000030 | l2p_addr_match
[81251.363701] iwlwifi 0000:04:00.0: 0x0000000D | lmpm_pmg_sel
[81251.363703] iwlwifi 0000:04:00.0: 0x09031905 | timestamp
[81251.363706] iwlwifi 0000:04:00.0: 0x0034F000 | flow_handler
[81251.363758] iwlwifi 0000:04:00.0: 0x00000000 | ADVANCED_SYSASSERT
[81251.363761] iwlwifi 0000:04:00.0: 0x00000000 | umac branchlink1
[81251.363763] iwlwifi 0000:04:00.0: 0x00000000 | umac branchlink2
[81251.363766] iwlwifi 0000:04:00.0: 0x00000000 | umac interruptlink1
[81251.363768] iwlwifi 0000:04:00.0: 0x00000000 | umac interruptlink2
[81251.363771] iwlwifi 0000:04:00.0: 0x00000000 | umac data1
[81251.363773] iwlwifi 0000:04:00.0: 0x00000000 | umac data2
[81251.363775] iwlwifi 0000:04:00.0: 0x00000000 | umac data3
[81251.363778] iwlwifi 0000:04:00.0: 0x00000000 | umac major
[81251.363780] iwlwifi 0000:04:00.0: 0x00000000 | umac minor
[81251.363783] iwlwifi 0000:04:00.0: 0xC0886298 | frame pointer
[81251.363785] iwlwifi 0000:04:00.0: 0xC0886298 | stack pointer
[81251.363788] iwlwifi 0000:04:00.0: 0x09270400 | last host cmd
[81251.363791] iwlwifi 0000:04:00.0: 0x00000000 | isr status reg
[81251.363801] ieee80211 phy0: Hardware restart was requested
[81251.841241] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled
[81251.841489] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled
[81251.979711] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled
[81251.979969] iwlwifi 0000:04:00.0: L1 Disabled - LTR Enabled
Ubuntu 16.04.2 LTS
the linux-firmware version is: 1.157.10
network card (lspci -v)
04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
Subsystem: Intel Corporation Wireless 8260
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 322
Region 0: Memory at df200000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
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