Ubuntu

Ubuntu 14.04 - 4.2 kernel - BCM43142 driver not working?

Asked by GBiradar

Hi Guys,

Well recently i have installed latest release of ubuntu 14.04 with kernel version 4.2, after 15 minutes my wifi frequently started disconnecting. i asked the same question in askubuntu but so far nobody responded that's why i'm sharing my problem here please see the link for that.

http://askubuntu.com/q/791225/561129

or else you have a look at my wireless info which was generated by wireless script.

https://drive.google.com/file/d/0B1yBjoUMK1kMWDlmVXkteHdUT2M/view?pref=2&pli=1

if anyone can help i will be thankfull from past two weeks i have not worked on my laptop.

Laptop specification in case need that information too:

Dell vostro 2520 64-bit

thanks & regards,
Gbiradar

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Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#1

What is the output of:

sudo lshw -C network; lsb_release -a; uname -a

Thanks

Revision history for this message
GBiradar (gbiradar) said : 		#2

Hi @actionparsnip, please find below output from the commands you asked any more info please do ask:
 *-network
       description: Wireless interface
       product: BCM43142 802.11b/g/n
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: wlan0
       version: 01
       serial: 9c:2a:70:d0:ca:39
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=wl0 driverversion=6.30.223.248 (r487574) latency=0 multicast=yes wireless=IEEE 802.11abg
       resources: irq:19 memory:f7c00000-f7c07fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: eth0
       version: 07
       serial: e0:db:55:a1:54:bd
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:25 ioport:e000(size=256) memory:f0004000-f0004fff memory:f0000000-f0003fff
  *-network
       description: Ethernet interface
       physical id: 2
       logical name: usb0
       serial: 02:53:55:57:39:35
       capabilities: ethernet physical
       configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.219 link=yes multicast=yes

No LSB modules are available
Distributor ID: Ubuntu
Description: Ubuntu 14.04.4 LTS
Release: 14.04
Codename: trusty

Linux Ganesh 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22 15:32:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Revision history for this message
Launchpad Janitor (janitor) said : 		#3

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

Revision history for this message
GBiradar (gbiradar) said : 		#4

Hi @Launchpad Janitor i have not yet got anyhelp. i'm using usb tethering for internet. still i need help.

Revision history for this message
Mayur (mail3dexter) said : 		#5

bump..

I am also facing the same issue..

Here is my output:

vpb@vpb-Vostro-2520:~$ lsb_release -a; uname -a; lshw -c Network; lsusb; dmesg | egrep -i 'blue|firm'
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.10
Release: 15.10
Codename: wily
Linux vpb-Vostro-2520 4.2.0-42-generic #49-Ubuntu SMP Tue Jun 28 21:26:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
WARNING: you should run this program as super-user.
  *-network UNCLAIMED
       description: Network controller
       product: BCM43142 802.11b/g/n
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:07:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: cap_list
       configuration: latency=0
       resources: memory:f7c00000-f7c07fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: enp9s0
       version: 07
       serial: 74:e6:e2:12:a1:57
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.1.7 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:24 ioport:e000(size=256) memory:f0004000-f0004fff memory:f0000000-f0003fff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0c45:6473 Microdia
Bus 001 Device 006: ID 0a5c:21d7 Broadcom Corp. BCM43142 Bluetooth 4.0
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[ 0.109935] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[ 11.630244] Bluetooth: Core ver 2.20
[ 11.630264] Bluetooth: HCI device and connection manager initialized
[ 11.630268] Bluetooth: HCI socket layer initialized
[ 11.630271] Bluetooth: L2CAP socket layer initialized
[ 11.630277] Bluetooth: SCO socket layer initialized
[ 13.952337] Bluetooth: hci0 command 0x1001 tx timeout
[ 21.953587] Bluetooth: hci0: BCM: Reading local version info failed (-110)
[ 21.961500] Bluetooth: hci0: BCM: chip id 70
[ 21.961513] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 22.383770] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 22.383779] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[ 28.161496] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 28.161500] Bluetooth: BNEP filters: protocol multicast
[ 28.161504] Bluetooth: BNEP socket layer initialized
[ 100.909465] Bluetooth: hci0: BCM: Reading local version info failed (-19)
[ 121.974981] Bluetooth: hci0 command 0x1001 tx timeout
[ 129.976167] Bluetooth: hci0: BCM: Reading local version info failed (-110)
[ 131.985470] Bluetooth: hci0 command 0x1001 tx timeout
[ 139.986669] Bluetooth: hci0: BCM: Reading local version info failed (-110)

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#6

Wily is EOL and no longer supported by the Ubuntu community in any way. I suggest you wipe the install off and do a clean install of Xenial. Xenial is LTS and supported til April 2021

Revision history for this message
GBiradar (gbiradar) said : 		#7

Hi,

i'm using ubuntu 16.10 LTS, still i'm facing the problem,

[ 69.780612] usb 1-1.4: new full-speed USB device number 4 using ehci-pci
[ 69.875757] usb 1-1.4: New USB device found, idVendor=0a5c, idProduct=21d7
[ 69.875763] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 69.875767] usb 1-1.4: Product: BCM43142A0
[ 69.875770] usb 1-1.4: Manufacturer: Broadcom Corp
[ 69.875772] usb 1-1.4: SerialNumber: 9C2A70D0CA3A
[ 70.196820] Bluetooth: Core ver 2.21
[ 70.196840] NET: Registered protocol family 31
[ 70.196841] Bluetooth: HCI device and connection manager initialized
[ 70.196845] Bluetooth: HCI socket layer initialized
[ 70.196847] Bluetooth: L2CAP socket layer initialized
[ 70.196852] Bluetooth: SCO socket layer initialized
[ 70.596642] usbcore: registered new interface driver btusb
[ 70.603752] Bluetooth: hci0: BCM: chip id 70
[ 70.619654] Bluetooth: hci0: BCM43142A
[ 70.619664] Bluetooth: hci0: BCM (001.001.011) build 0000
[ 70.652707] bluetooth hci0: Direct firmware load for brcm/BCM.hcd failed with error -2
[ 70.652714] Bluetooth: hci0: BCM: Patch brcm/BCM.hcd not found
[ 72.656604] Bluetooth: hci0 command 0x1003 tx timeout
[ 73.450154] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 73.450158] Bluetooth: BNEP filters: protocol multicast
[ 73.450164] Bluetooth: BNEP socket layer initialized
[ 73.651455] Bluetooth: RFCOMM TTY layer initialized
[ 73.651465] Bluetooth: RFCOMM socket layer initialized
[ 73.651471] Bluetooth: RFCOMM ver 1.11
[ 288.406323] ------------[ cut here ]------------
[ 288.406349] WARNING: CPU: 2 PID: 439 at /build/linux-R0TiM8/linux-4.4.0/net/wireless/sme.c:850 cfg80211_roamed+0x86/0xa0 [cfg80211]()
[ 288.406350] Modules linked in: rfcomm bnep btusb btrtl btbcm btintel bluetooth binfmt_misc nls_iso8859_1 wl(POE) snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_intel snd_hda_codec uvcvideo snd_hda_core intel_rapl videobuf2_vmalloc videobuf2_memops x86_pkg_temp_thermal intel_powerclamp videobuf2_v4l2 videobuf2_core coretemp v4l2_common snd_hwdep kvm_intel snd_pcm videodev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq media snd_seq_device snd_timer dell_wmi mei_me sparse_keymap kvm cfg80211 snd mei dell_laptop irqbypass crct10dif_pclmul dcdbas dell_smm_hwmon input_leds crc32_pclmul shpchp serio_raw soundcore cryptd mac_hid lpc_ich parport_pc ppdev lp parport autofs4 ums_realtek uas usb_storage i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect ahci sysimgblt fb_sys_fops
[ 288.406388] libahci drm psmouse r8169 mii wmi video fjes
[ 288.406395] CPU: 2 PID: 439 Comm: wl_event_handle Tainted: P OE 4.4.0-38-generic #57-Ubuntu
[ 288.406396] Hardware name: Dell Inc. Vostro 2520/0V1NDP, BIOS A11 02/24/2014
[ 288.406398] 0000000000000286 00000000ff0b74b0 ffff8800d5f4fdc8 ffffffff813f1b73
[ 288.406401] 0000000000000000 ffffffffc0375bd0 ffff8800d5f4fe00 ffffffff810811c2
[ 288.406403] ffff8800ce8d7000 ffff880119385b40 0000000000000099 ffff880119385cc0
[ 288.406405] Call Trace:
[ 288.406412] [<ffffffff813f1b73>] dump_stack+0x63/0x90
[ 288.406416] [<ffffffff810811c2>] warn_slowpath_common+0x82/0xc0
[ 288.406418] [<ffffffff8108130a>] warn_slowpath_null+0x1a/0x20
[ 288.406432] [<ffffffffc0352b96>] cfg80211_roamed+0x86/0xa0 [cfg80211]
[ 288.406471] [<ffffffffc075b955>] wl_notify_roaming_status+0xc5/0x140 [wl]
[ 288.406505] [<ffffffffc075afb0>] wl_event_handler+0x60/0x1d0 [wl]
[ 288.406538] [<ffffffffc075af50>] ? wl_notify_scan_status+0x320/0x320 [wl]
[ 288.406540] [<ffffffff810a08d8>] kthread+0xd8/0xf0
[ 288.406543] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 288.406546] [<ffffffff81830a8f>] ret_from_fork+0x3f/0x70
[ 288.406548] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 288.406549] ---[ end trace 91e2975807f31653 ]---
[ 294.360385] cfg80211: World regulatory domain updated:
[ 294.360389] cfg80211: DFS Master region: unset
[ 294.360390] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 294.360392] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 294.360394] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 294.360395] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 294.360397] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 294.360399] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 294.360401] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 294.360402] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 294.360403] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[ 296.393069] ------------[ cut here ]------------
[ 296.393109] WARNING: CPU: 1 PID: 439 at /build/linux-R0TiM8/linux-4.4.0/net/wireless/sme.c:850 cfg80211_roamed+0x86/0xa0 [cfg80211]()
[ 296.393112] Modules linked in: rfcomm bnep btusb btrtl btbcm btintel bluetooth binfmt_misc nls_iso8859_1 wl(POE) snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_intel snd_hda_codec uvcvideo snd_hda_core intel_rapl videobuf2_vmalloc videobuf2_memops x86_pkg_temp_thermal intel_powerclamp videobuf2_v4l2 videobuf2_core coretemp v4l2_common snd_hwdep kvm_intel snd_pcm videodev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq media snd_seq_device snd_timer dell_wmi mei_me sparse_keymap kvm cfg80211 snd mei dell_laptop irqbypass crct10dif_pclmul dcdbas dell_smm_hwmon input_leds crc32_pclmul shpchp serio_raw soundcore cryptd mac_hid lpc_ich parport_pc ppdev lp parport autofs4 ums_realtek uas usb_storage i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect ahci sysimgblt fb_sys_fops
[ 296.393168] libahci drm psmouse r8169 mii wmi video fjes
[ 296.393178] CPU: 1 PID: 439 Comm: wl_event_handle Tainted: P W OE 4.4.0-38-generic #57-Ubuntu
[ 296.393181] Hardware name: Dell Inc. Vostro 2520/0V1NDP, BIOS A11 02/24/2014
[ 296.393184] 0000000000000286 00000000ff0b74b0 ffff8800d5f4fdc8 ffffffff813f1b73
[ 296.393188] 0000000000000000 ffffffffc0375bd0 ffff8800d5f4fe00 ffffffff810811c2
[ 296.393192] ffff8800ce8d7000 ffff8800d6077b40 0000000000000099 ffff8800d6077d80
[ 296.393195] Call Trace:
[ 296.393205] [<ffffffff813f1b73>] dump_stack+0x63/0x90
[ 296.393211] [<ffffffff810811c2>] warn_slowpath_common+0x82/0xc0
[ 296.393215] [<ffffffff8108130a>] warn_slowpath_null+0x1a/0x20
[ 296.393240] [<ffffffffc0352b96>] cfg80211_roamed+0x86/0xa0 [cfg80211]
[ 296.393316] [<ffffffffc075b955>] wl_notify_roaming_status+0xc5/0x140 [wl]
[ 296.393379] [<ffffffffc075afb0>] wl_event_handler+0x60/0x1d0 [wl]
[ 296.393439] [<ffffffffc075af50>] ? wl_notify_scan_status+0x320/0x320 [wl]
[ 296.393445] [<ffffffff810a08d8>] kthread+0xd8/0xf0
[ 296.393449] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 296.393454] [<ffffffff81830a8f>] ret_from_fork+0x3f/0x70
[ 296.393457] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 296.393460] ---[ end trace 91e2975807f31654 ]---
[ 307.760955] ------------[ cut here ]------------
[ 307.760981] WARNING: CPU: 2 PID: 439 at /build/linux-R0TiM8/linux-4.4.0/net/wireless/sme.c:850 cfg80211_roamed+0x86/0xa0 [cfg80211]()
[ 307.760982] Modules linked in: rfcomm bnep btusb btrtl btbcm btintel bluetooth binfmt_misc nls_iso8859_1 wl(POE) snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_intel snd_hda_codec uvcvideo snd_hda_core intel_rapl videobuf2_vmalloc videobuf2_memops x86_pkg_temp_thermal intel_powerclamp videobuf2_v4l2 videobuf2_core coretemp v4l2_common snd_hwdep kvm_intel snd_pcm videodev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq media snd_seq_device snd_timer dell_wmi mei_me sparse_keymap kvm cfg80211 snd mei dell_laptop irqbypass crct10dif_pclmul dcdbas dell_smm_hwmon input_leds crc32_pclmul shpchp serio_raw soundcore cryptd mac_hid lpc_ich parport_pc ppdev lp parport autofs4 ums_realtek uas usb_storage i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect ahci sysimgblt fb_sys_fops
[ 307.761017] libahci drm psmouse r8169 mii wmi video fjes
[ 307.761023] CPU: 2 PID: 439 Comm: wl_event_handle Tainted: P W OE 4.4.0-38-generic #57-Ubuntu
[ 307.761024] Hardware name: Dell Inc. Vostro 2520/0V1NDP, BIOS A11 02/24/2014
[ 307.761026] 0000000000000286 00000000ff0b74b0 ffff8800d5f4fdc8 ffffffff813f1b73
[ 307.761028] 0000000000000000 ffffffffc0375bd0 ffff8800d5f4fe00 ffffffff810811c2
[ 307.761030] ffff8800ce8d7000 ffff880119385900 0000000000000099 ffff880119385600
[ 307.761032] Call Trace:
[ 307.761038] [<ffffffff813f1b73>] dump_stack+0x63/0x90
[ 307.761041] [<ffffffff810811c2>] warn_slowpath_common+0x82/0xc0
[ 307.761043] [<ffffffff8108130a>] warn_slowpath_null+0x1a/0x20
[ 307.761056] [<ffffffffc0352b96>] cfg80211_roamed+0x86/0xa0 [cfg80211]
[ 307.761091] [<ffffffffc075b955>] wl_notify_roaming_status+0xc5/0x140 [wl]
[ 307.761121] [<ffffffffc075afb0>] wl_event_handler+0x60/0x1d0 [wl]
[ 307.761150] [<ffffffffc075af50>] ? wl_notify_scan_status+0x320/0x320 [wl]
[ 307.761152] [<ffffffff810a08d8>] kthread+0xd8/0xf0
[ 307.761154] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 307.761157] [<ffffffff81830a8f>] ret_from_fork+0x3f/0x70
[ 307.761159] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 307.761160] ---[ end trace 91e2975807f31655 ]---
[ 913.376047] cfg80211: World regulatory domain updated:
[ 913.376051] cfg80211: DFS Master region: unset
[ 913.376052] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 913.376055] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 913.376056] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 913.376058] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[ 913.376059] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[ 913.376061] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[ 913.376063] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[ 913.376064] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[ 913.376065] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[ 915.196072] ------------[ cut here ]------------
[ 915.196104] WARNING: CPU: 0 PID: 439 at /build/linux-R0TiM8/linux-4.4.0/net/wireless/sme.c:850 cfg80211_roamed+0x86/0xa0 [cfg80211]()
[ 915.196106] Modules linked in: rfcomm bnep btusb btrtl btbcm btintel bluetooth binfmt_misc nls_iso8859_1 wl(POE) snd_hda_codec_hdmi snd_hda_codec_cirrus snd_hda_codec_generic snd_hda_intel snd_hda_codec uvcvideo snd_hda_core intel_rapl videobuf2_vmalloc videobuf2_memops x86_pkg_temp_thermal intel_powerclamp videobuf2_v4l2 videobuf2_core coretemp v4l2_common snd_hwdep kvm_intel snd_pcm videodev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq media snd_seq_device snd_timer dell_wmi mei_me sparse_keymap kvm cfg80211 snd mei dell_laptop irqbypass crct10dif_pclmul dcdbas dell_smm_hwmon input_leds crc32_pclmul shpchp serio_raw soundcore cryptd mac_hid lpc_ich parport_pc ppdev lp parport autofs4 ums_realtek uas usb_storage i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect ahci sysimgblt fb_sys_fops
[ 915.196155] libahci drm psmouse r8169 mii wmi video fjes
[ 915.196163] CPU: 0 PID: 439 Comm: wl_event_handle Tainted: P W OE 4.4.0-38-generic #57-Ubuntu
[ 915.196165] Hardware name: Dell Inc. Vostro 2520/0V1NDP, BIOS A11 02/24/2014
[ 915.196167] 0000000000000286 00000000ff0b74b0 ffff8800d5f4fdc8 ffffffff813f1b73
[ 915.196171] 0000000000000000 ffffffffc0375bd0 ffff8800d5f4fe00 ffffffff810811c2
[ 915.196173] ffff8800ce8d7000 ffff8800d7784840 0000000000000099 ffff8800d7784c00
[ 915.196177] Call Trace:
[ 915.196184] [<ffffffff813f1b73>] dump_stack+0x63/0x90
[ 915.196189] [<ffffffff810811c2>] warn_slowpath_common+0x82/0xc0
[ 915.196192] [<ffffffff8108130a>] warn_slowpath_null+0x1a/0x20
[ 915.196210] [<ffffffffc0352b96>] cfg80211_roamed+0x86/0xa0 [cfg80211]
[ 915.196260] [<ffffffffc075b955>] wl_notify_roaming_status+0xc5/0x140 [wl]
[ 915.196303] [<ffffffffc075afb0>] wl_event_handler+0x60/0x1d0 [wl]
[ 915.196346] [<ffffffffc075af50>] ? wl_notify_scan_status+0x320/0x320 [wl]
[ 915.196349] [<ffffffff810a08d8>] kthread+0xd8/0xf0
[ 915.196352] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 915.196356] [<ffffffff81830a8f>] ret_from_fork+0x3f/0x70
[ 915.196358] [<ffffffff810a0800>] ? kthread_create_on_node+0x1e0/0x1e0
[ 915.196360] ---[ end trace 91e2975807f31656 ]---

Revision history for this message
GBiradar (gbiradar) said : 		#8

For more info about my system,

i have face the same issue in ubuntu 14.04 also

but below info is w.r.t to ubuntu 16.04

https://drive.google.com/file/d/0B1yBjoUMK1kMSlozeXVJdXlPb1U/view?usp=sharing

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Vaibhav Bhosale (vaibhavbhosale15) said : 		#9

One reason for this to happen is probably that secure boot mode is on, and hence the third-party drivers(are they?) won't work. Turning it off worked for me, but haven't been able to know the reason for the same yet. Can anybody help with that?

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GBiradar (gbiradar) said : 		#10

Hi Vaibhav Bhosale,

as per my knowledge secure boot mode is on will affect when dual booting is their but as per my system only ubuntu is running. correct me if i'm wrong. if what you are saying is correct i will check that too.

regards,
gbiradar

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Vaibhav Bhosale (vaibhavbhosale15) said : 		#11

Yes, it would affect dual boot. But, since I am using only Ubuntu, I did not face that trouble.

Can you help with this problem?

Provide an answer of your own, or ask GBiradar for more information if necessary.

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