It means it still successfully loads -27.ucode. You need to file an upstream bug report.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1694547 Title: Microcode SW errors since Bios upgraded to 1.4.17 - Dell XPS 13 Status in linux package in Ubuntu: Confirmed Bug description: May 30 09:59:33 XPS13 kernel: [ 4080.198856] iwlwifi 0000:3a:00.0: Microcode SW error detected. Restarting 0x2000000. May 30 09:59:33 XPS13 kernel: [ 4080.198870] iwlwifi 0000:3a:00.0: CSR values: May 30 09:59:33 XPS13 kernel: [ 4080.198876] iwlwifi 0000:3a:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG) May 30 09:59:33 XPS13 kernel: [ 4080.198898] iwlwifi 0000:3a:00.0: CSR_HW_IF_CONFIG_REG: 0X00489008 May 30 09:59:33 XPS13 kernel: [ 4080.198917] iwlwifi 0000:3a:00.0: CSR_INT_COALESCING: 0X00000040 May 30 09:59:33 XPS13 kernel: [ 4080.198935] iwlwifi 0000:3a:00.0: CSR_INT: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.198953] iwlwifi 0000:3a:00.0: CSR_INT_MASK: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.198970] iwlwifi 0000:3a:00.0: CSR_FH_INT_STATUS: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.198987] iwlwifi 0000:3a:00.0: CSR_GPIO_IN: 0X00000019 May 30 09:59:33 XPS13 kernel: [ 4080.199005] iwlwifi 0000:3a:00.0: CSR_RESET: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199022] iwlwifi 0000:3a:00.0: CSR_GP_CNTRL: 0X08040005 May 30 09:59:33 XPS13 kernel: [ 4080.199040] iwlwifi 0000:3a:00.0: CSR_HW_REV: 0X00000201 May 30 09:59:33 XPS13 kernel: [ 4080.199058] iwlwifi 0000:3a:00.0: CSR_EEPROM_REG: 0Xd55555d5 May 30 09:59:33 XPS13 kernel: [ 4080.199075] iwlwifi 0000:3a:00.0: CSR_EEPROM_GP: 0Xd55555d5 May 30 09:59:33 XPS13 kernel: [ 4080.199092] iwlwifi 0000:3a:00.0: CSR_OTP_GP_REG: 0Xd55555d5 May 30 09:59:33 XPS13 kernel: [ 4080.199108] iwlwifi 0000:3a:00.0: CSR_GIO_REG: 0X001f0042 May 30 09:59:33 XPS13 kernel: [ 4080.199125] iwlwifi 0000:3a:00.0: CSR_GP_UCODE_REG: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199143] iwlwifi 0000:3a:00.0: CSR_GP_DRIVER_REG: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199159] iwlwifi 0000:3a:00.0: CSR_UCODE_DRV_GP1: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199176] iwlwifi 0000:3a:00.0: CSR_UCODE_DRV_GP2: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199193] iwlwifi 0000:3a:00.0: CSR_LED_REG: 0X00000060 May 30 09:59:33 XPS13 kernel: [ 4080.199210] iwlwifi 0000:3a:00.0: CSR_DRAM_INT_TBL_REG: 0X88274289 May 30 09:59:33 XPS13 kernel: [ 4080.199226] iwlwifi 0000:3a:00.0: CSR_GIO_CHICKEN_BITS: 0X07800200 May 30 09:59:33 XPS13 kernel: [ 4080.199243] iwlwifi 0000:3a:00.0: CSR_ANA_PLL_CFG: 0Xd55555d5 May 30 09:59:33 XPS13 kernel: [ 4080.199260] iwlwifi 0000:3a:00.0: CSR_MONITOR_STATUS_REG: 0Xc03803c0 May 30 09:59:33 XPS13 kernel: [ 4080.199277] iwlwifi 0000:3a:00.0: CSR_HW_REV_WA_REG: 0X0001001a May 30 09:59:33 XPS13 kernel: [ 4080.199294] iwlwifi 0000:3a:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0010 May 30 09:59:33 XPS13 kernel: [ 4080.199299] iwlwifi 0000:3a:00.0: FH register values: May 30 09:59:33 XPS13 kernel: [ 4080.199331] iwlwifi 0000:3a:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X26fc7000 May 30 09:59:33 XPS13 kernel: [ 4080.199359] iwlwifi 0000:3a:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X026fc710 May 30 09:59:33 XPS13 kernel: [ 4080.199386] iwlwifi 0000:3a:00.0: FH_RSCSR_CHNL0_WPTR: 0X000000a8 May 30 09:59:33 XPS13 kernel: [ 4080.199414] iwlwifi 0000:3a:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801054 May 30 09:59:33 XPS13 kernel: [ 4080.199442] iwlwifi 0000:3a:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc May 30 09:59:33 XPS13 kernel: [ 4080.199469] iwlwifi 0000:3a:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X03030000 May 30 09:59:33 XPS13 kernel: [ 4080.199497] iwlwifi 0000:3a:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199525] iwlwifi 0000:3a:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0000 May 30 09:59:33 XPS13 kernel: [ 4080.199552] iwlwifi 0000:3a:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000 May 30 09:59:33 XPS13 kernel: [ 4080.199692] iwlwifi 0000:3a:00.0: Start IWL Error Log Dump: May 30 09:59:33 XPS13 kernel: [ 4080.199699] iwlwifi 0000:3a:00.0: Status: 0x00000000, count: 6 May 30 09:59:33 XPS13 kernel: [ 4080.199705] iwlwifi 0000:3a:00.0: Loaded firmware version: 21.302800.0 May 30 09:59:33 XPS13 kernel: [ 4080.199712] iwlwifi 0000:3a:00.0: 0x00000084 | NMI_INTERRUPT_UNKNOWN May 30 09:59:33 XPS13 kernel: [ 4080.199717] iwlwifi 0000:3a:00.0: 0x000002F0 | trm_hw_status0 May 30 09:59:33 XPS13 kernel: [ 4080.199723] iwlwifi 0000:3a:00.0: 0x00000000 | trm_hw_status1 May 30 09:59:33 XPS13 kernel: [ 4080.199728] iwlwifi 0000:3a:00.0: 0x00000BD8 | branchlink2 May 30 09:59:33 XPS13 kernel: [ 4080.199733] iwlwifi 0000:3a:00.0: 0x0061D37E | interruptlink1 May 30 09:59:33 XPS13 kernel: [ 4080.199738] iwlwifi 0000:3a:00.0: 0x00026AC4 | interruptlink2 May 30 09:59:33 XPS13 kernel: [ 4080.199743] iwlwifi 0000:3a:00.0: 0x00000000 | data1 May 30 09:59:33 XPS13 kernel: [ 4080.199748] iwlwifi 0000:3a:00.0: 0x00000080 | data2 May 30 09:59:33 XPS13 kernel: [ 4080.199753] iwlwifi 0000:3a:00.0: 0x07830000 | data3 May 30 09:59:33 XPS13 kernel: [ 4080.199759] iwlwifi 0000:3a:00.0: 0x61406A24 | beacon time May 30 09:59:33 XPS13 kernel: [ 4080.199764] iwlwifi 0000:3a:00.0: 0x2CFE3F18 | tsf low May 30 09:59:33 XPS13 kernel: [ 4080.199769] iwlwifi 0000:3a:00.0: 0x0000004D | tsf hi May 30 09:59:33 XPS13 kernel: [ 4080.199774] iwlwifi 0000:3a:00.0: 0x00000000 | time gp1 May 30 09:59:33 XPS13 kernel: [ 4080.199779] iwlwifi 0000:3a:00.0: 0xF281F137 | time gp2 May 30 09:59:33 XPS13 kernel: [ 4080.199784] iwlwifi 0000:3a:00.0: 0x00000000 | uCode revision type May 30 09:59:33 XPS13 kernel: [ 4080.199789] iwlwifi 0000:3a:00.0: 0x00000015 | uCode version major May 30 09:59:33 XPS13 kernel: [ 4080.199794] iwlwifi 0000:3a:00.0: 0x00049ED0 | uCode version minor May 30 09:59:33 XPS13 kernel: [ 4080.199799] iwlwifi 0000:3a:00.0: 0x00000201 | hw version May 30 09:59:33 XPS13 kernel: [ 4080.199805] iwlwifi 0000:3a:00.0: 0x00489008 | board version May 30 09:59:33 XPS13 kernel: [ 4080.199809] iwlwifi 0000:3a:00.0: 0x0000001C | hcmd May 30 09:59:33 XPS13 kernel: [ 4080.199814] iwlwifi 0000:3a:00.0: 0x00022000 | isr0 May 30 09:59:33 XPS13 kernel: [ 4080.199819] iwlwifi 0000:3a:00.0: 0x00800000 | isr1 May 30 09:59:33 XPS13 kernel: [ 4080.199825] iwlwifi 0000:3a:00.0: 0x08001802 | isr2 May 30 09:59:33 XPS13 kernel: [ 4080.199829] iwlwifi 0000:3a:00.0: 0x404000C2 | isr3 May 30 09:59:33 XPS13 kernel: [ 4080.199834] iwlwifi 0000:3a:00.0: 0x00000000 | isr4 May 30 09:59:33 XPS13 kernel: [ 4080.199839] iwlwifi 0000:3a:00.0: 0x00800110 | last cmd Id May 30 09:59:33 XPS13 kernel: [ 4080.199845] iwlwifi 0000:3a:00.0: 0x00000000 | wait_event May 30 09:59:33 XPS13 kernel: [ 4080.199850] iwlwifi 0000:3a:00.0: 0x00004F1D | l2p_control May 30 09:59:33 XPS13 kernel: [ 4080.199855] iwlwifi 0000:3a:00.0: 0x00000020 | l2p_duration May 30 09:59:33 XPS13 kernel: [ 4080.199860] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_mhvalid May 30 09:59:33 XPS13 kernel: [ 4080.199865] iwlwifi 0000:3a:00.0: 0x000000F0 | l2p_addr_match May 30 09:59:33 XPS13 kernel: [ 4080.199870] iwlwifi 0000:3a:00.0: 0x0000000D | lmpm_pmg_sel May 30 09:59:33 XPS13 kernel: [ 4080.199875] iwlwifi 0000:3a:00.0: 0x09031905 | timestamp May 30 09:59:33 XPS13 kernel: [ 4080.199880] iwlwifi 0000:3a:00.0: 0x0034A8C0 | flow_handler May 30 09:59:33 XPS13 kernel: [ 4080.199953] iwlwifi 0000:3a:00.0: Start IWL Error Log Dump: May 30 09:59:33 XPS13 kernel: [ 4080.199958] iwlwifi 0000:3a:00.0: Status: 0x00000000, count: 7 May 30 09:59:33 XPS13 kernel: [ 4080.199963] iwlwifi 0000:3a:00.0: 0x00000070 | ADVANCED_SYSASSERT May 30 09:59:33 XPS13 kernel: [ 4080.199968] iwlwifi 0000:3a:00.0: 0x00000000 | umac branchlink1 May 30 09:59:33 XPS13 kernel: [ 4080.199974] iwlwifi 0000:3a:00.0: 0xC008113A | umac branchlink2 May 30 09:59:33 XPS13 kernel: [ 4080.199979] iwlwifi 0000:3a:00.0: 0xC008A75A | umac interruptlink1 May 30 09:59:33 XPS13 kernel: [ 4080.199984] iwlwifi 0000:3a:00.0: 0xC0081000 | umac interruptlink2 May 30 09:59:33 XPS13 kernel: [ 4080.199989] iwlwifi 0000:3a:00.0: 0x00000800 | umac data1 May 30 09:59:33 XPS13 kernel: [ 4080.199994] iwlwifi 0000:3a:00.0: 0xC0081000 | umac data2 May 30 09:59:33 XPS13 kernel: [ 4080.199999] iwlwifi 0000:3a:00.0: 0xDEADBEEF | umac data3 May 30 09:59:33 XPS13 kernel: [ 4080.200004] iwlwifi 0000:3a:00.0: 0x00000015 | umac major May 30 09:59:33 XPS13 kernel: [ 4080.200009] iwlwifi 0000:3a:00.0: 0x00049ED0 | umac minor May 30 09:59:33 XPS13 kernel: [ 4080.200014] iwlwifi 0000:3a:00.0: 0xC0886298 | frame pointer May 30 09:59:33 XPS13 kernel: [ 4080.200019] iwlwifi 0000:3a:00.0: 0xC0886298 | stack pointer May 30 09:59:33 XPS13 kernel: [ 4080.200024] iwlwifi 0000:3a:00.0: 0x09EE014E | last host cmd May 30 09:59:33 XPS13 kernel: [ 4080.200029] iwlwifi 0000:3a:00.0: 0x00000000 | isr status reg May 30 09:59:33 XPS13 kernel: [ 4080.200054] ieee80211 phy0: Hardware restart was requested May 30 09:59:34 XPS13 kernel: [ 4080.717296] iwlwifi 0000:3a:00.0: L1 Enabled - LTR Disabled May 30 09:59:34 XPS13 kernel: [ 4080.717572] iwlwifi 0000:3a:00.0: L1 Enabled - LTR Disabled May 30 09:59:34 XPS13 kernel: [ 4080.846225] iwlwifi 0000:3a:00.0: L1 Enabled - LTR Disabled May 30 09:59:34 XPS13 kernel: [ 4080.846520] iwlwifi 0000:3a:00.0: L1 Enabled - LTR Disabled ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-21-generic 4.10.0-21.23 ProcVersionSignature: Ubuntu 4.10.0-21.23-generic 4.10.11 Uname: Linux 4.10.0-21-generic x86_64 ApportVersion: 2.20.4-0ubuntu4.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: silles 1774 F.... pulseaudio CurrentDesktop: GNOME Date: Tue May 30 22:46:58 2017 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=77dbafe8-5835-4b61-b1d7-84f34b867ba5 InstallationDate: Installed on 2016-09-08 (264 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0c45:670c Microdia Bus 001 Device 002: ID 8087:0a2b Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 9350 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-21-generic.efi.signed root=UUID=fe8099eb-a258-42d6-8f67-69496f1e0fcf ro zswap.enabled=1 quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-21-generic N/A linux-backports-modules-4.10.0-21-generic N/A linux-firmware 1.164.1 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-04-21 (39 days ago) dmi.bios.date: 05/10/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.4.17 dmi.board.name: 07TYC2 dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.4.17:bd05/10/2017:svnDellInc.:pnXPS139350:pvr:rvnDellInc.:rn07TYC2:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.name: XPS 13 9350 dmi.sys.vendor: Dell Inc. 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