It seems a recent Ubuntu update has overwritten my /etc/modprobe.d/iwlwifi.conf re-enabling 11n.
Setting disable_11n=1 made this problem go away again. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-firmware in Ubuntu. https://bugs.launchpad.net/bugs/1405842 Title: Microcode SW error detected. Status in linux-firmware package in Ubuntu: Confirmed Bug description: I just saw this error in the kernel log: [171056.176336] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x2000000. [171056.176341] iwlwifi 0000:02:00.0: CSR values: [171056.176343] iwlwifi 0000:02:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG) [171056.176359] iwlwifi 0000:02:00.0: CSR_HW_IF_CONFIG_REG: 0X40489204 [171056.176373] iwlwifi 0000:02:00.0: CSR_INT_COALESCING: 0X80000040 [171056.176387] iwlwifi 0000:02:00.0: CSR_INT: 0X00000000 [171056.176401] iwlwifi 0000:02:00.0: CSR_INT_MASK: 0X00000000 [171056.176414] iwlwifi 0000:02:00.0: CSR_FH_INT_STATUS: 0X00000000 [171056.176428] iwlwifi 0000:02:00.0: CSR_GPIO_IN: 0X00000000 [171056.176442] iwlwifi 0000:02:00.0: CSR_RESET: 0X00000000 [171056.176456] iwlwifi 0000:02:00.0: CSR_GP_CNTRL: 0X080403c5 [171056.176470] iwlwifi 0000:02:00.0: CSR_HW_REV: 0X00000144 [171056.176484] iwlwifi 0000:02:00.0: CSR_EEPROM_REG: 0X00000000 [171056.176498] iwlwifi 0000:02:00.0: CSR_EEPROM_GP: 0X80000000 [171056.176512] iwlwifi 0000:02:00.0: CSR_OTP_GP_REG: 0X803a0000 [171056.176526] iwlwifi 0000:02:00.0: CSR_GIO_REG: 0X00080042 [171056.176540] iwlwifi 0000:02:00.0: CSR_GP_UCODE_REG: 0X00000000 [171056.176554] iwlwifi 0000:02:00.0: CSR_GP_DRIVER_REG: 0X00000000 [171056.176568] iwlwifi 0000:02:00.0: CSR_UCODE_DRV_GP1: 0X00000000 [171056.176582] iwlwifi 0000:02:00.0: CSR_UCODE_DRV_GP2: 0X00000000 [171056.176596] iwlwifi 0000:02:00.0: CSR_LED_REG: 0X00000060 [171056.176610] iwlwifi 0000:02:00.0: CSR_DRAM_INT_TBL_REG: 0X8821dad1 [171056.176624] iwlwifi 0000:02:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200 [171056.176638] iwlwifi 0000:02:00.0: CSR_ANA_PLL_CFG: 0Xd55555d5 [171056.176652] iwlwifi 0000:02:00.0: CSR_MONITOR_STATUS_REG: 0X3c08019d [171056.176666] iwlwifi 0000:02:00.0: CSR_HW_REV_WA_REG: 0X0001001a [171056.176680] iwlwifi 0000:02:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0010 [171056.176682] iwlwifi 0000:02:00.0: FH register values: [171056.176707] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X0c483900 [171056.176723] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X00c48380 [171056.176739] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_WPTR: 0X00000050 [171056.176755] iwlwifi 0000:02:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X00801114 [171056.176771] iwlwifi 0000:02:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc [171056.176786] iwlwifi 0000:02:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X02030000 [171056.176802] iwlwifi 0000:02:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000 [171056.176817] iwlwifi 0000:02:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0001 [171056.176833] iwlwifi 0000:02:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000 [171056.176975] iwlwifi 0000:02:00.0: Start IWL Error Log Dump: [171056.176977] iwlwifi 0000:02:00.0: Status: 0x00000000, count: 6 [171056.176978] iwlwifi 0000:02:00.0: Loaded firmware version: 25.228.9.0 [171056.176980] iwlwifi 0000:02:00.0: 0x00000034 | NMI_INTERRUPT_WDG [171056.176982] iwlwifi 0000:02:00.0: 0x000000E3 | uPc [171056.176984] iwlwifi 0000:02:00.0: 0x00000000 | branchlink1 [171056.176985] iwlwifi 0000:02:00.0: 0x00000BA4 | branchlink2 [171056.176987] iwlwifi 0000:02:00.0: 0x0001626C | interruptlink1 [171056.176988] iwlwifi 0000:02:00.0: 0x00029676 | interruptlink2 [171056.176990] iwlwifi 0000:02:00.0: 0x00000000 | data1 [171056.176991] iwlwifi 0000:02:00.0: 0x00000002 | data2 [171056.176992] iwlwifi 0000:02:00.0: 0x02039842 | data3 [171056.176994] iwlwifi 0000:02:00.0: 0xDE803F2A | beacon time [171056.176996] iwlwifi 0000:02:00.0: 0x8DBC10F8 | tsf low [171056.176997] iwlwifi 0000:02:00.0: 0x00000001 | tsf hi [171056.176998] iwlwifi 0000:02:00.0: 0x00000000 | time gp1 [171056.177000] iwlwifi 0000:02:00.0: 0x0BE49F4E | time gp2 [171056.177001] iwlwifi 0000:02:00.0: 0x00000000 | time gp3 [171056.177003] iwlwifi 0000:02:00.0: 0x000419E4 | uCode version [171056.177004] iwlwifi 0000:02:00.0: 0x00000144 | hw version [171056.177006] iwlwifi 0000:02:00.0: 0x40489204 | board version [171056.177007] iwlwifi 0000:02:00.0: 0x1041001C | hcmd [171056.177009] iwlwifi 0000:02:00.0: 0x26F63002 | isr0 [171056.177010] iwlwifi 0000:02:00.0: 0x11806000 | isr1 [171056.177012] iwlwifi 0000:02:00.0: 0x0000001A | isr2 [171056.177013] iwlwifi 0000:02:00.0: 0x40417CC2 | isr3 [171056.177015] iwlwifi 0000:02:00.0: 0x00000000 | isr4 [171056.177016] iwlwifi 0000:02:00.0: 0x10804112 | isr_pref [171056.177018] iwlwifi 0000:02:00.0: 0x00000000 | wait_event [171056.177020] iwlwifi 0000:02:00.0: 0x00004288 | l2p_control [171056.177021] iwlwifi 0000:02:00.0: 0x00009C22 | l2p_duration [171056.177023] iwlwifi 0000:02:00.0: 0x000003BF | l2p_mhvalid [171056.177024] iwlwifi 0000:02:00.0: 0x000000EF | l2p_addr_match [171056.177026] iwlwifi 0000:02:00.0: 0x00000017 | lmpm_pmg_sel [171056.177027] iwlwifi 0000:02:00.0: 0x20111734 | timestamp [171056.177029] iwlwifi 0000:02:00.0: 0x19605058 | flow_handler [171056.177032] ieee80211 phy0: Hardware restart was requested [171056.297652] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled [171056.298033] iwlwifi 0000:02:00.0: L1 Enabled - LTR Disabled This is with this kernel version: ii linux-image-3.18.0-031800-generic 3.18.0-031800.201412071935 amd64 Linux kernel image for version 3.18.0 on 64 bit x86 SMP ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-firmware 1.138.1 Uname: Linux 3.18.0-031800-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 CurrentDesktop: KDE Date: Fri Dec 26 20:39:07 2014 Dependencies: EcryptfsInUse: Yes PackageArchitecture: all SourcePackage: linux-firmware UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1405842/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
