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[Bug 1372616] Re: iwlwifi Intel Centrino Advanced-N 6230 Wifi disconnects

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Shang Wu <shang@xxxxxxxxxxxxx>
Date: Wed, 15 Oct 2014 09:40:05 -0000
Reply-to: Bug 1372616 <1372616@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Kernel OOPS message:

Oct 15 11:37:01 x230 kernel: [ 5719.889746] Call Trace:
Oct 15 11:37:01 x230 kernel: [ 5719.889755]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
Oct 15 11:37:01 x230 kernel: [ 5719.889769]  [<ffffffffc071e68f>] iwl_trans_pcie_send_hcmd+0x41f/0x580 [iwlwifi]
Oct 15 11:37:01 x230 kernel: [ 5719.889776]  [<ffffffff810b9590>] ? prepare_to_wait_event+0x100/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.889788]  [<ffffffffc081b81a>] iwl_dvm_send_cmd+0x5a/0x150 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889798]  [<ffffffffc0828ade>] iwl6000_hw_channel_switch+0x15e/0x1e0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889808]  [<ffffffffc08269b5>] ? iwl_set_rxon_ht+0x115/0x1a0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889816]  [<ffffffffc0814f77>] iwlagn_mac_channel_switch+0x167/0x210 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889839]  [<ffffffffc0783bfc>] ieee80211_sta_process_chanswitch+0x27c/0x370 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889859]  [<ffffffffc0786223>] ieee80211_rx_mgmt_beacon+0x393/0x1060 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889864]  [<ffffffff81175292>] ? write_cache_pages+0x112/0x480
Oct 15 11:37:01 x230 kernel: [ 5719.889868]  [<ffffffff810b249c>] ? update_group_capacity+0x19c/0x290
Oct 15 11:37:01 x230 kernel: [ 5719.889890]  [<ffffffffc07883f3>] ieee80211_sta_rx_queued_mgmt+0x2f3/0x570 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889893]  [<ffffffff810b2fb5>] ? load_balance+0x195/0x8b0
Oct 15 11:37:01 x230 kernel: [ 5719.889899]  [<ffffffff8109e178>] ? update_rq_clock.part.73+0x18/0x40
Oct 15 11:37:01 x230 kernel: [ 5719.889904]  [<ffffffff8101c88e>] ? native_sched_clock+0x2e/0xa0
Oct 15 11:37:01 x230 kernel: [ 5719.889908]  [<ffffffff8101c909>] ? sched_clock+0x9/0x10
Oct 15 11:37:01 x230 kernel: [ 5719.889913]  [<ffffffff810a85cd>] ? sched_clock_cpu+0x9d/0xb0
Oct 15 11:37:01 x230 kernel: [ 5719.889916]  [<ffffffff810b0601>] ? put_prev_entity+0x31/0x440
Oct 15 11:37:01 x230 kernel: [ 5719.889933]  [<ffffffffc075549c>] ieee80211_iface_work+0x25c/0x370 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889937]  [<ffffffff8108d8e2>] process_one_work+0x182/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.889941]  [<ffffffff8108dcab>] worker_thread+0x6b/0x6a0
Oct 15 11:37:01 x230 kernel: [ 5719.889944]  [<ffffffff8108dc40>] ? process_one_work+0x4e0/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.889948]  [<ffffffff81094aeb>] kthread+0xdb/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.889953]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.889958]  [<ffffffff81787c3c>] ret_from_fork+0x7c/0xb0
Oct 15 11:37:01 x230 kernel: [ 5719.889962]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.889966] wlan0: driver channel switch failed, disconnecting
Oct 15 11:37:01 x230 kernel: [ 5719.890359] iwlwifi 0000:03:00.0: iwl_trans_wait_tx_queue_empty bad state = 0
Oct 15 11:37:01 x230 kernel: [ 5719.890365] ieee80211 phy0: Hardware restart was requested
Oct 15 11:37:01 x230 kernel: [ 5719.890375] iwlwifi 0000:03:00.0: iwl_trans_wait_tx_queue_empty bad state = 0
Oct 15 11:37:01 x230 kernel: [ 5719.890383] iwlwifi 0000:03:00.0: Fw not loaded - dropping CMD: 18
Oct 15 11:37:01 x230 kernel: [ 5719.890386] wlan0: HW problem - can not stop rx aggregation for c4:01:7c:15:b2:cc tid 0
Oct 15 11:37:01 x230 kernel: [ 5719.890390] iwlwifi 0000:03:00.0: Fw not loaded - dropping CMD: 18
Oct 15 11:37:01 x230 kernel: [ 5719.890392] wlan0: HW problem - can not stop rx aggregation for c4:01:7c:15:b2:cc tid 1
Oct 15 11:37:01 x230 kernel: [ 5719.890396] iwlwifi 0000:03:00.0: Fw not loaded - dropping CMD: 18
Oct 15 11:37:01 x230 kernel: [ 5719.890398] wlan0: HW problem - can not stop rx aggregation for c4:01:7c:15:b2:cc tid 5
Oct 15 11:37:01 x230 kernel: [ 5719.890402] iwlwifi 0000:03:00.0: Fw not loaded - dropping CMD: 18
Oct 15 11:37:01 x230 kernel: [ 5719.890404] wlan0: HW problem - can not stop rx aggregation for c4:01:7c:15:b2:cc tid 6
Oct 15 11:37:01 x230 kernel: [ 5719.908513] iwlwifi 0000:03:00.0: iwl_trans_wait_tx_queue_empty bad state = 0
Oct 15 11:37:01 x230 kernel: [ 5719.908696] iwlwifi 0000:03:00.0: L1 Enabled; Disabling L0S
Oct 15 11:37:01 x230 kernel: [ 5719.915395] iwlwifi 0000:03:00.0: Radio type=0x1-0x2-0x0
Oct 15 11:37:01 x230 kernel: [ 5719.991196] iwlwifi 0000:03:00.0: Microcode SW error detected.  Restarting 0x82000000.
Oct 15 11:37:01 x230 kernel: [ 5719.991205] iwlwifi 0000:03:00.0: CSR values:
Oct 15 11:37:01 x230 kernel: [ 5719.991209] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
Oct 15 11:37:01 x230 kernel: [ 5719.991239] iwlwifi 0000:03:00.0:        CSR_HW_IF_CONFIG_REG: 0X00488700
Oct 15 11:37:01 x230 kernel: [ 5719.991267] iwlwifi 0000:03:00.0:          CSR_INT_COALESCING: 0X0000ff40
Oct 15 11:37:01 x230 kernel: [ 5719.991294] iwlwifi 0000:03:00.0:                     CSR_INT: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991321] iwlwifi 0000:03:00.0:                CSR_INT_MASK: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991348] iwlwifi 0000:03:00.0:           CSR_FH_INT_STATUS: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991376] iwlwifi 0000:03:00.0:                 CSR_GPIO_IN: 0X00000030
Oct 15 11:37:01 x230 kernel: [ 5719.991403] iwlwifi 0000:03:00.0:                   CSR_RESET: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991430] iwlwifi 0000:03:00.0:                CSR_GP_CNTRL: 0X080403c5
Oct 15 11:37:01 x230 kernel: [ 5719.991457] iwlwifi 0000:03:00.0:                  CSR_HW_REV: 0X000000b0
Oct 15 11:37:01 x230 kernel: [ 5719.991483] iwlwifi 0000:03:00.0:              CSR_EEPROM_REG: 0X483c0ffd
Oct 15 11:37:01 x230 kernel: [ 5719.991510] iwlwifi 0000:03:00.0:               CSR_EEPROM_GP: 0X90000001
Oct 15 11:37:01 x230 kernel: [ 5719.991538] iwlwifi 0000:03:00.0:              CSR_OTP_GP_REG: 0X00030001
Oct 15 11:37:01 x230 kernel: [ 5719.991565] iwlwifi 0000:03:00.0:                 CSR_GIO_REG: 0X00080042
Oct 15 11:37:01 x230 kernel: [ 5719.991592] iwlwifi 0000:03:00.0:            CSR_GP_UCODE_REG: 0X00000004
Oct 15 11:37:01 x230 kernel: [ 5719.991619] iwlwifi 0000:03:00.0:           CSR_GP_DRIVER_REG: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991645] iwlwifi 0000:03:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991673] iwlwifi 0000:03:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991699] iwlwifi 0000:03:00.0:                 CSR_LED_REG: 0X00000018
Oct 15 11:37:01 x230 kernel: [ 5719.991725] iwlwifi 0000:03:00.0:        CSR_DRAM_INT_TBL_REG: 0X88406c3a
Oct 15 11:37:01 x230 kernel: [ 5719.991751] iwlwifi 0000:03:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
Oct 15 11:37:01 x230 kernel: [ 5719.991777] iwlwifi 0000:03:00.0:             CSR_ANA_PLL_CFG: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.991805] iwlwifi 0000:03:00.0:      CSR_MONITOR_STATUS_REG: 0X6bf7f757
Oct 15 11:37:01 x230 kernel: [ 5719.991832] iwlwifi 0000:03:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
Oct 15 11:37:01 x230 kernel: [ 5719.991858] iwlwifi 0000:03:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
Oct 15 11:37:01 x230 kernel: [ 5719.991861] iwlwifi 0000:03:00.0: FH register values:
Oct 15 11:37:01 x230 kernel: [ 5719.991899] iwlwifi 0000:03:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X4070b800
Oct 15 11:37:01 x230 kernel: [ 5719.991936] iwlwifi 0000:03:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X04059ae0
Oct 15 11:37:01 x230 kernel: [ 5719.991972] iwlwifi 0000:03:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X00000008
Oct 15 11:37:01 x230 kernel: [ 5719.992016] iwlwifi 0000:03:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80801114
Oct 15 11:37:01 x230 kernel: [ 5719.992052] iwlwifi 0000:03:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
Oct 15 11:37:01 x230 kernel: [ 5719.992089] iwlwifi 0000:03:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
Oct 15 11:37:01 x230 kernel: [ 5719.992125] iwlwifi 0000:03:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.992161] iwlwifi 0000:03:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
Oct 15 11:37:01 x230 kernel: [ 5719.992198] iwlwifi 0000:03:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
Oct 15 11:37:01 x230 kernel: [ 5719.992202] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1
Oct 15 11:37:01 x230 kernel: [ 5719.992367] iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
Oct 15 11:37:01 x230 kernel: [ 5719.992371] iwlwifi 0000:03:00.0: Status: 0x0000000C, count: 6
Oct 15 11:37:01 x230 kernel: [ 5719.992375] iwlwifi 0000:03:00.0: 0x000014E2 | ADVANCED_SYSASSERT          
Oct 15 11:37:01 x230 kernel: [ 5719.992379] iwlwifi 0000:03:00.0: 0x0001740C | uPc
Oct 15 11:37:01 x230 kernel: [ 5719.992382] iwlwifi 0000:03:00.0: 0x000173EE | branchlink1
Oct 15 11:37:01 x230 kernel: [ 5719.992385] iwlwifi 0000:03:00.0: 0x000173EE | branchlink2
Oct 15 11:37:01 x230 kernel: [ 5719.992388] iwlwifi 0000:03:00.0: 0x0000D6BE | interruptlink1
Oct 15 11:37:01 x230 kernel: [ 5719.992391] iwlwifi 0000:03:00.0: 0x00000000 | interruptlink2
Oct 15 11:37:01 x230 kernel: [ 5719.992394] iwlwifi 0000:03:00.0: 0x00000000 | data1
Oct 15 11:37:01 x230 kernel: [ 5719.992397] iwlwifi 0000:03:00.0: 0x00000078 | data2
Oct 15 11:37:01 x230 kernel: [ 5719.992409] iwlwifi 0000:03:00.0: 0x00000226 | line
Oct 15 11:37:01 x230 kernel: [ 5719.992418] iwlwifi 0000:03:00.0: 0x000087C4 | beacon time
Oct 15 11:37:01 x230 kernel: [ 5719.992426] iwlwifi 0000:03:00.0: 0x0001083C | tsf low
Oct 15 11:37:01 x230 kernel: [ 5719.992435] iwlwifi 0000:03:00.0: 0x00000000 | tsf hi
Oct 15 11:37:01 x230 kernel: [ 5719.992444] iwlwifi 0000:03:00.0: 0x00000000 | time gp1
Oct 15 11:37:01 x230 kernel: [ 5719.992452] iwlwifi 0000:03:00.0: 0x00010840 | time gp2
Oct 15 11:37:01 x230 kernel: [ 5719.992461] iwlwifi 0000:03:00.0: 0x00000000 | time gp3
Oct 15 11:37:01 x230 kernel: [ 5719.992469] iwlwifi 0000:03:00.0: 0x754312A8 | uCode version
Oct 15 11:37:01 x230 kernel: [ 5719.992478] iwlwifi 0000:03:00.0: 0x000000B0 | hw version
Oct 15 11:37:01 x230 kernel: [ 5719.992487] iwlwifi 0000:03:00.0: 0x00488700 | board version
Oct 15 11:37:01 x230 kernel: [ 5719.992495] iwlwifi 0000:03:00.0: 0x090A0010 | hcmd
Oct 15 11:37:01 x230 kernel: [ 5719.992503] iwlwifi 0000:03:00.0: 0x00122080 | isr0
Oct 15 11:37:01 x230 kernel: [ 5719.992508] iwlwifi 0000:03:00.0: 0x00000000 | isr1
Oct 15 11:37:01 x230 kernel: [ 5719.992511] iwlwifi 0000:03:00.0: 0x00000602 | isr2
Oct 15 11:37:01 x230 kernel: [ 5719.992514] iwlwifi 0000:03:00.0: 0x014400C0 | isr3
Oct 15 11:37:01 x230 kernel: [ 5719.992517] iwlwifi 0000:03:00.0: 0x00000000 | isr4
Oct 15 11:37:01 x230 kernel: [ 5719.992520] iwlwifi 0000:03:00.0: 0x01000112 | isr_pref
Oct 15 11:37:01 x230 kernel: [ 5719.992524] iwlwifi 0000:03:00.0: 0x00024B96 | wait_event
Oct 15 11:37:01 x230 kernel: [ 5719.992527] iwlwifi 0000:03:00.0: 0x00000000 | l2p_control
Oct 15 11:37:01 x230 kernel: [ 5719.992530] iwlwifi 0000:03:00.0: 0x00000000 | l2p_duration
Oct 15 11:37:01 x230 kernel: [ 5719.992533] iwlwifi 0000:03:00.0: 0x00000000 | l2p_mhvalid
Oct 15 11:37:01 x230 kernel: [ 5719.992536] iwlwifi 0000:03:00.0: 0x00000000 | l2p_addr_match
Oct 15 11:37:01 x230 kernel: [ 5719.992539] iwlwifi 0000:03:00.0: 0x00000047 | lmpm_pmg_sel
Oct 15 11:37:01 x230 kernel: [ 5719.992542] iwlwifi 0000:03:00.0: 0x06061222 | timestamp
Oct 15 11:37:01 x230 kernel: [ 5719.992545] iwlwifi 0000:03:00.0: 0x00400810 | flow_handler
Oct 15 11:37:01 x230 kernel: [ 5719.992626] iwlwifi 0000:03:00.0: Start IWL Event Log Dump: nothing in log
Oct 15 11:37:01 x230 kernel: [ 5719.992747] iwlwifi 0000:03:00.0: FW error in SYNC CMD REPLY_RXON
Oct 15 11:37:01 x230 kernel: [ 5719.992757] CPU: 1 PID: 30 Comm: kworker/1:0 Not tainted 3.16.0-22-generic #29-Ubuntu
Oct 15 11:37:01 x230 kernel: [ 5719.992761] Hardware name: LENOVO 2320KBV/2320KBV, BIOS G2ET99WW (2.59 ) 12/04/2013
Oct 15 11:37:01 x230 kernel: [ 5719.992797] Workqueue: events ieee80211_restart_work [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.992829]  ffff880407c27c00 ffff880407c27b70 ffffffff8177fcbc ffff8804024ac000
Oct 15 11:37:01 x230 kernel: [ 5719.992849]  ffff880407c27bd8 ffffffffc071e68f ffff880403a17000 ffff880000000000
Oct 15 11:37:01 x230 kernel: [ 5719.992854]  ffff880407c30000 ffffffff810b9590 ffff880407c27ba0 ffff880407c27ba0
Oct 15 11:37:01 x230 kernel: [ 5719.992860] Call Trace:
Oct 15 11:37:01 x230 kernel: [ 5719.992871]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
Oct 15 11:37:01 x230 kernel: [ 5719.992889]  [<ffffffffc071e68f>] iwl_trans_pcie_send_hcmd+0x41f/0x580 [iwlwifi]
Oct 15 11:37:01 x230 kernel: [ 5719.992906]  [<ffffffff810b9590>] ? prepare_to_wait_event+0x100/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.992921]  [<ffffffffc081b81a>] iwl_dvm_send_cmd+0x5a/0x150 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.992937]  [<ffffffffc081bc51>] iwl_dvm_send_cmd_pdu+0x41/0x50 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.992950]  [<ffffffffc0827329>] iwlagn_commit_rxon+0x6a9/0xdb0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.992961]  [<ffffffffc0810f19>] iwl_alive_start+0x259/0x4a0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.992973]  [<ffffffffc0815abc>] iwlagn_mac_start+0x13c/0x200 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.993002]  [<ffffffffc076f542>] ieee80211_reconfig+0x262/0x1500 [mac80211]
x8a4/0x8b0 [mac80211]()
Oct 15 11:37:01 x230 kernel: [ 5719.993716] wlan0:  Failed check-sdata-in-driver check, flags: 0x0
Oct 15 11:37:01 x230 kernel: [ 5719.993718] Modules linked in: ipt_REJECT xt_addrtype xt_conntrack aufs dm_crypt veth xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables snd_hda_codec_hdmi snd_hda_codec_realtek btusb snd_hda_codec_generic intel_rapl snd_hda_intel x86_pkg_temp_thermal intel_powerclamp coretemp uvcvideo snd_hda_controller videobuf2_vmalloc kvm_intel videobuf2_memops videobuf2_core snd_hda_codec kvm snd_hwdep v4l2_common videodev snd_pcm media crct10dif_pclmul crc32_pclmul ghash_clmulni_intel arc4 aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwldvm mac80211 snd_seq_midi snd_seq_midi_event joydev serio_raw iwlwifi rfcomm snd_rawmidi bnep bluetooth cfg80211 thinkpad_acpi 6lowpan_iphc nvram lpc_ich snd_seq snd_seq_device snd_timer snd shpchp soundcore mei_me mei mac_hid parport_pc binfmt_misc ppdev lp parport hid_generic usbhid hid i915 psmouse ahci i2c_algo_bit libahci drm_kms_helper e1000e sdhci_pci drm sdhci ptp pps_core wmi video
Oct 15 11:37:01 x230 kernel: [ 5719.993776] CPU: 1 PID: 30 Comm: kworker/1:0 Tainted: G        W     3.16.0-22-generic #29-Ubuntu
Oct 15 11:37:01 x230 kernel: [ 5719.993778] Hardware name: LENOVO 2320KBV/2320KBV, BIOS G2ET99WW (2.59 ) 12/04/2013
Oct 15 11:37:01 x230 kernel: [ 5719.993788] Workqueue: events ieee80211_restart_work [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993790]  0000000000000009 ffff880407c27ba8 ffffffff8177fcbc ffff880407c27bf0
Oct 15 11:37:01 x230 kernel: [ 5719.993793]  ffff880407c27be0 ffffffff8106fd8d ffff880404820680 ffff8800ca18a8c0
Oct 15 11:37:01 x230 kernel: [ 5719.993796]  ffff8804048212b0 ffff8804048212c8 ffff8800ca18b360 ffff880407c27c40
Oct 15 11:37:01 x230 kernel: [ 5719.993799] Call Trace:
Oct 15 11:37:01 x230 kernel: [ 5719.993804]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
Oct 15 11:37:01 x230 kernel: [ 5719.993808]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
Oct 15 11:37:01 x230 kernel: [ 5719.993812]  [<ffffffff8106fdfc>] warn_slowpath_fmt+0x4c/0x50
Oct 15 11:37:01 x230 kernel: [ 5719.993827]  [<ffffffffc0756634>] ieee80211_do_stop+0x8a4/0x8b0 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993833]  [<ffffffff816a2ea3>] ? dev_deactivate_many+0x223/0x270
Oct 15 11:37:01 x230 kernel: [ 5719.993847]  [<ffffffffc075665a>] ieee80211_stop+0x1a/0x20 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993853]  [<ffffffff816797f5>] __dev_close_many+0x95/0xf0
Oct 15 11:37:01 x230 kernel: [ 5719.993857]  [<ffffffff816798d1>] dev_close_many+0x81/0x120
Oct 15 11:37:01 x230 kernel: [ 5719.993861]  [<ffffffff8167bae6>] dev_close.part.71+0x36/0x50
Oct 15 11:37:01 x230 kernel: [ 5719.993864]  [<ffffffff8167bb21>] dev_close+0x21/0x30
Oct 15 11:37:01 x230 kernel: [ 5719.993880]  [<ffffffffc05ea8e5>] cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993896]  [<ffffffffc076f605>] ieee80211_reconfig+0x325/0x1500 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993908]  [<ffffffffc07411b2>] ieee80211_restart_work+0x42/0x80 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.993911]  [<ffffffff8108d8e2>] process_one_work+0x182/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.993914]  [<ffffffff8108dcab>] worker_thread+0x6b/0x6a0
Oct 15 11:37:01 x230 kernel: [ 5719.993918]  [<ffffffff8108dc40>] ? process_one_work+0x4e0/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.993922]  [<ffffffff81094aeb>] kthread+0xdb/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.993926]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.993930]  [<ffffffff81787c3c>] ret_from_fork+0x7c/0xb0
Oct 15 11:37:01 x230 kernel: [ 5719.993934]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.993936] ---[ end trace 85e174202ecf6d9d ]---
Oct 15 11:37:01 x230 kernel: [ 5719.997399] cfg80211: Calling CRDA to update world regulatory domain
Oct 15 11:37:01 x230 kernel: [ 5720.029583] cfg80211: World regulatory domain updated:
Oct 15 11:37:01 x230 kernel: [ 5720.029588] cfg80211:  DFS Master region: unset
Oct 15 11:37:01 x230 kernel: [ 5720.029590] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Oct 15 11:37:01 x230 kernel: [ 5720.029594] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Oct 15 11:37:01 x230 kernel: [ 5720.029596] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Oct 15 11:37:01 x230 kernel: [ 5720.029599] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
Oct 15 11:37:01 x230 kernel: [ 5720.029601] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Oct 15 11:37:01 x230 kernel: [ 5720.029603] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)

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https://bugs.launchpad.net/bugs/1372616

Title:
   iwlwifi Intel Centrino Advanced-N 6230 Wifi disconnects

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Wifi disconnects every 30 minutes or so. I use Ubuntu 14.10 (the devel version). The used kernel is: 
  Linux daniel-laptop 3.16.0-16-generic #22-Ubuntu SMP Wed Sep 17 18:47:43 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

  dmesg gives the following:
  daniel@daniel-laptop:~$ sudo dmesg | tail -n10
  [ 2122.301141] wlan0: deauthenticated from 00:1f:3f:d0:95:b3 (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
  [ 2122.340914] cfg80211: Calling CRDA to update world regulatory domain
  [ 2122.510148] cfg80211: World regulatory domain updated:
  [ 2122.510156] cfg80211:  DFS Master region: unset
  [ 2122.510158] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
  [ 2122.510162] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [ 2122.510165] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [ 2122.510167] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
  [ 2122.510170] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  [ 2122.510173] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)

  
  Here is the information concerning the wifi 

  daniel@daniel-laptop:~$ sudo lshw -class  network
    *-network               
         Beschreibung: Kabellose Verbindung
         Produkt: Centrino Advanced-N 6230 [Rainbow Peak]
         Hersteller: Intel Corporation
         Physische ID: 0
         Bus-Informationen: pci@0000:02:00.0
         Logischer Name: wlan0
         Version: 34
         Seriennummer: 88:53:2e:6e:20:bc
         Breite: 64 bits
         Takt: 33MHz
         Fähigkeiten: pm msi pciexpress bus_master cap_list ethernet physical wireless
         Konfiguration: broadcast=yes driver=iwlwifi driverversion=3.16.0-16-generic firmware=18.168.6.1 ip=192.168.178.44 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
         Ressourcen: irq:50 memory:c7400000-c7401fff
  --- 
  ApportVersion: 2.14.7-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.10
  InstallationDate: Installed on 2013-11-26 (305 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  Package: linux (not installed)
  Tags:  utopic
  Uname: Linux 3.17.0-031700rc6-generic x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm autopilot cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True

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References

[Bug 1372616] [NEW] iwlwifi Intel Centrino Advanced-N 6230 Wifi disconnects
From: Daniel Beck, 2014-09-22