Under Ubuntu 12.10 amd64 on a Dell XPS15 L501X with Intel Wireless-N 1000, the firmware needs to be downgraded from v5 to v3, as described in here: https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=903668 Otherwise I got: [ 8.785447] iwlwifi: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree: [ 8.785451] iwlwifi: Copyright(c) 2003-2012 Intel Corporation [ 8.785598] iwlwifi 0000:04:00.0: pci_resource_len = 0x00002000 [ 8.785602] iwlwifi 0000:04:00.0: pci_resource_base = ffffc900117ec000 [ 8.785604] iwlwifi 0000:04:00.0: HW Revision ID = 0x0 [ 8.785726] iwlwifi 0000:04:00.0: irq 56 for MSI/MSI-X [ 8.787445] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138 [ 8.787573] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEBUG disabled [ 8.787576] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEBUGFS enabled [ 8.787578] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled [ 8.787580] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled [ 8.787582] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_P2P disabled [ 8.787584] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C [ 8.787716] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 8.795041] iwlwifi 0000:04:00.0: RF_KILL bit toggled to enable radio. ... [ 8.811075] iwlwifi 0000:04:00.0: device EEPROM VER=0x15d, CALIB=0x6 [ 8.811080] iwlwifi 0000:04:00.0: Device SKU: 0x50 [ 8.811083] iwlwifi 0000:04:00.0: Valid Tx ant: 0x1, Valid Rx ant: 0x3 [ 8.811094] iwlwifi 0000:04:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels ... [ 8.820222] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs' ... [ 12.494913] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S [ 12.510326] iwlwifi 0000:04:00.0: Microcode SW error detected. Restarting 0x82000000. [ 12.510333] iwlwifi 0000:04:00.0: CSR values: [ 12.510336] iwlwifi 0000:04:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG) [ 12.510344] iwlwifi 0000:04:00.0: CSR_HW_IF_CONFIG_REG: 0X00c80300 [ 12.510352] iwlwifi 0000:04:00.0: CSR_INT_COALESCING: 0X00000040 [ 12.510360] iwlwifi 0000:04:00.0: CSR_INT: 0X80000000 [ 12.510367] iwlwifi 0000:04:00.0: CSR_INT_MASK: 0X00000000 [ 12.510375] iwlwifi 0000:04:00.0: CSR_FH_INT_STATUS: 0X40010000 [ 12.510382] iwlwifi 0000:04:00.0: CSR_GPIO_IN: 0X00000000 [ 12.510390] iwlwifi 0000:04:00.0: CSR_RESET: 0X00000000 [ 12.510398] iwlwifi 0000:04:00.0: CSR_GP_CNTRL: 0X080403c5 [ 12.510406] iwlwifi 0000:04:00.0: CSR_HW_REV: 0X0000006c [ 12.510413] iwlwifi 0000:04:00.0: CSR_EEPROM_REG: 0Xc63f3885 [ 12.510421] iwlwifi 0000:04:00.0: CSR_EEPROM_GP: 0X90000001 [ 12.510428] iwlwifi 0000:04:00.0: CSR_OTP_GP_REG: 0X00210801 [ 12.510436] iwlwifi 0000:04:00.0: CSR_GIO_REG: 0X00080046 [ 12.510444] iwlwifi 0000:04:00.0: CSR_GP_UCODE_REG: 0X00000000 [ 12.510451] iwlwifi 0000:04:00.0: CSR_GP_DRIVER_REG: 0X00000000 [ 12.510458] iwlwifi 0000:04:00.0: CSR_UCODE_DRV_GP1: 0X00000000 [ 12.510466] iwlwifi 0000:04:00.0: CSR_UCODE_DRV_GP2: 0X00000000 [ 12.510473] iwlwifi 0000:04:00.0: CSR_LED_REG: 0X00000018 [ 12.510481] iwlwifi 0000:04:00.0: CSR_DRAM_INT_TBL_REG: 0X00000000 [ 12.510488] iwlwifi 0000:04:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200 [ 12.510497] iwlwifi 0000:04:00.0: CSR_ANA_PLL_CFG: 0X00880300 [ 12.510505] iwlwifi 0000:04:00.0: CSR_HW_REV_WA_REG: 0X0001001a [ 12.510513] iwlwifi 0000:04:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0000 [ 12.510516] iwlwifi 0000:04:00.0: FH register values: [ 12.510535] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X210fc300 [ 12.510553] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X0210ef60 [ 12.510571] iwlwifi 0000:04:00.0: FH_RSCSR_CHNL0_WPTR: 0X000000f8 [ 12.510590] iwlwifi 0000:04:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80811104 [ 12.510609] iwlwifi 0000:04:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc [ 12.510627] iwlwifi 0000:04:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X07030000 [ 12.510645] iwlwifi 0000:04:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000 [ 12.510664] iwlwifi 0000:04:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0001 [ 12.510682] iwlwifi 0000:04:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000 [ 12.510687] iwlwifi 0000:04:00.0: Loaded firmware version: 39.31.5.1 build 35138 [ 12.510831] iwlwifi 0000:04:00.0: Start IWL Error Log Dump: [ 12.510836] iwlwifi 0000:04:00.0: Status: 0x00000010, count: 5 [ 12.510840] iwlwifi 0000:04:00.0: 0x00000005 | SYSASSERT [ 12.510843] iwlwifi 0000:04:00.0: 0x00016E00 | uPc [ 12.510847] iwlwifi 0000:04:00.0: 0x00016E00 | branchlink1 [ 12.510850] iwlwifi 0000:04:00.0: 0x00016E00 | branchlink2 [ 12.510853] iwlwifi 0000:04:00.0: 0x00000000 | interruptlink1 [ 12.510857] iwlwifi 0000:04:00.0: 0x00000000 | interruptlink2 [ 12.510861] iwlwifi 0000:04:00.0: 0x00000000 | data1 [ 12.510864] iwlwifi 0000:04:00.0: 0x00000000 | data2 [ 12.510867] iwlwifi 0000:04:00.0: 0x00000616 | line [ 12.510870] iwlwifi 0000:04:00.0: 0x00018BCB | beacon time [ 12.510874] iwlwifi 0000:04:00.0: 0x00000435 | tsf low [ 12.510877] iwlwifi 0000:04:00.0: 0x00000000 | tsf hi [ 12.510880] iwlwifi 0000:04:00.0: 0x00000000 | time gp1 [ 12.510884] iwlwifi 0000:04:00.0: 0x00000439 | time gp2 [ 12.510887] iwlwifi 0000:04:00.0: 0x00000000 | time gp3 [ 12.510890] iwlwifi 0000:04:00.0: 0x0001271F | uCode version [ 12.510893] iwlwifi 0000:04:00.0: 0x0000006C | hw version [ 12.510896] iwlwifi 0000:04:00.0: 0x00C80300 | board version [ 12.510900] iwlwifi 0000:04:00.0: 0x00000000 | hcmd [ 12.510903] iwlwifi 0000:04:00.0: 0x00122000 | isr0 [ 12.510907] iwlwifi 0000:04:00.0: 0x00000000 | isr1 [ 12.510910] iwlwifi 0000:04:00.0: 0x00000002 | isr2 [ 12.510914] iwlwifi 0000:04:00.0: 0x004400C0 | isr3 [ 12.510917] iwlwifi 0000:04:00.0: 0x00000000 | isr4 [ 12.510920] iwlwifi 0000:04:00.0: 0x00000000 | isr_pref [ 12.510924] iwlwifi 0000:04:00.0: 0x00002BFE | wait_event [ 12.510927] iwlwifi 0000:04:00.0: 0x00000000 | l2p_control [ 12.510931] iwlwifi 0000:04:00.0: 0x00000000 | l2p_duration [ 12.510934] iwlwifi 0000:04:00.0: 0x00000000 | l2p_mhvalid [ 12.510938] iwlwifi 0000:04:00.0: 0x00100040 | l2p_addr_match [ 12.510941] iwlwifi 0000:04:00.0: 0x00000007 | lmpm_pmg_sel [ 12.510944] iwlwifi 0000:04:00.0: 0x00000000 | timestamp [ 12.510948] iwlwifi 0000:04:00.0: 0x0000F808 | flow_handler [ 12.511014] iwlwifi 0000:04:00.0: Start IWL Event Log Dump: display last 5 entries [ 12.511038] iwlwifi 0000:04:00.0: EVT_LOGT:0000000000:0x0000028c:0117 [ 12.511053] iwlwifi 0000:04:00.0: EVT_LOGT:0000000021:0x00000000:1208 [ 12.511068] iwlwifi 0000:04:00.0: EVT_LOGT:0000001002:0x00000001:0071 [ 12.511083] iwlwifi 0000:04:00.0: EVT_LOGT:0000001078:0x00000002:0071 [ 12.511098] iwlwifi 0000:04:00.0: EVT_LOGT:0000001084:0x00000000:0125 [ 12.511475] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -5 [ 12.511556] iwlwifi 0000:04:00.0: Unable to initialize device. [ 12.511650] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 12.511654] ieee80211 phy0: Hardware restart was requested