kernel-packages team mailing list archive

[Stuart Bishop <1432659@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

This new laptop's wireless connection (Broadcom BCM43142) is
disconnecting every few minutes. This corresponds to panics and
tracebacks in the kernel log.

The laptop was freshly installed with Ubuntu 14.10 (Utopic), and
disconnections were seen. I then upgraded it to Ubuntu 15.04 (Vivid
developement release), and am still experiencing the problem. The
Broadcom proprietary driver is being used, and seems to be the only one
available for this device.


Mar 16 20:38:38 aargh kernel: [  557.285585] ------------[ cut here ]------------
Mar 16 20:38:38 aargh kernel: [  557.285646] WARNING: CPU: 0 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
Mar 16 20:38:38 aargh kernel: [  557.285652] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
Mar 16 20:38:38 aargh kernel: [  557.285789] CPU: 0 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
Mar 16 20:38:38 aargh kernel: [  557.285793] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
Mar 16 20:38:38 aargh kernel: [  557.285798]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
Mar 16 20:38:38 aargh kernel: [  557.285804]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
Mar 16 20:38:38 aargh kernel: [  557.285809]  ffff880250909000 ffff88023bfc6a80 0000000000000099 ffff88023bfc6900
Mar 16 20:38:38 aargh kernel: [  557.285816] Call Trace:
Mar 16 20:38:38 aargh kernel: [  557.285831]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
Mar 16 20:38:38 aargh kernel: [  557.285841]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
Mar 16 20:38:38 aargh kernel: [  557.285846]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
Mar 16 20:38:38 aargh kernel: [  557.285873]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
Mar 16 20:38:38 aargh kernel: [  557.285969]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
Mar 16 20:38:38 aargh kernel: [  557.286044]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
Mar 16 20:38:38 aargh kernel: [  557.286122]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
Mar 16 20:38:38 aargh kernel: [  557.286144]  [<ffffffff81094679>] kthread+0xc9/0xe0
Mar 16 20:38:38 aargh kernel: [  557.286153]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:38 aargh kernel: [  557.286161]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
Mar 16 20:38:38 aargh kernel: [  557.286169]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:38 aargh kernel: [  557.286173] ---[ end trace 3fbf2d3851265ca6 ]---
Mar 16 20:38:44 aargh kernel: [  563.512221] cfg80211: Calling CRDA to update world regulatory domain
Mar 16 20:38:44 aargh kernel: [  563.514217] cfg80211: World regulatory domain updated:
Mar 16 20:38:44 aargh kernel: [  563.514220] cfg80211:  DFS Master region: unset
Mar 16 20:38:44 aargh kernel: [  563.514221] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Mar 16 20:38:44 aargh kernel: [  563.514224] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:44 aargh kernel: [  563.514225] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:44 aargh kernel: [  563.514226] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:44 aargh kernel: [  563.514227] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:44 aargh kernel: [  563.514229] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:44 aargh kernel: [  564.255711] ------------[ cut here ]------------
Mar 16 20:38:44 aargh kernel: [  564.255746] WARNING: CPU: 0 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
Mar 16 20:38:44 aargh kernel: [  564.255747] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
Mar 16 20:38:44 aargh kernel: [  564.255799] CPU: 0 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
Mar 16 20:38:44 aargh kernel: [  564.255801] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
Mar 16 20:38:44 aargh kernel: [  564.255802]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
Mar 16 20:38:44 aargh kernel: [  564.255804]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
Mar 16 20:38:44 aargh kernel: [  564.255805]  ffff880250909000 ffff8802510f6a80 0000000000000099 ffff8802510f6f00
Mar 16 20:38:44 aargh kernel: [  564.255807] Call Trace:
Mar 16 20:38:44 aargh kernel: [  564.255812]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
Mar 16 20:38:44 aargh kernel: [  564.255815]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
Mar 16 20:38:44 aargh kernel: [  564.255817]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
Mar 16 20:38:44 aargh kernel: [  564.255824]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
Mar 16 20:38:44 aargh kernel: [  564.255851]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
Mar 16 20:38:44 aargh kernel: [  564.255873]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
Mar 16 20:38:44 aargh kernel: [  564.255893]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
Mar 16 20:38:44 aargh kernel: [  564.255896]  [<ffffffff81094679>] kthread+0xc9/0xe0
Mar 16 20:38:44 aargh kernel: [  564.255898]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:44 aargh kernel: [  564.255901]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
Mar 16 20:38:44 aargh kernel: [  564.255903]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:44 aargh kernel: [  564.255904] ---[ end trace 3fbf2d3851265ca7 ]---
Mar 16 20:38:51 aargh kernel: [  570.533932] cfg80211: Calling CRDA to update world regulatory domain
Mar 16 20:38:51 aargh kernel: [  570.536708] cfg80211: World regulatory domain updated:
Mar 16 20:38:51 aargh kernel: [  570.536715] cfg80211:  DFS Master region: unset
Mar 16 20:38:51 aargh kernel: [  570.536718] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Mar 16 20:38:51 aargh kernel: [  570.536724] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:51 aargh kernel: [  570.536728] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:51 aargh kernel: [  570.536731] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:51 aargh kernel: [  570.536735] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:51 aargh kernel: [  570.536738] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
Mar 16 20:38:52 aargh kernel: [  571.328091] ------------[ cut here ]------------
Mar 16 20:38:52 aargh kernel: [  571.328188] WARNING: CPU: 1 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
Mar 16 20:38:52 aargh kernel: [  571.328190] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
Mar 16 20:38:52 aargh kernel: [  571.328252] CPU: 1 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
Mar 16 20:38:52 aargh kernel: [  571.328254] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
Mar 16 20:38:52 aargh kernel: [  571.328256]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
Mar 16 20:38:52 aargh kernel: [  571.328259]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
Mar 16 20:38:52 aargh kernel: [  571.328261]  ffff880250909000 ffff88022121bd80 0000000000000099 ffff88022121b780
Mar 16 20:38:52 aargh kernel: [  571.328264] Call Trace:
Mar 16 20:38:52 aargh kernel: [  571.328279]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
Mar 16 20:38:52 aargh kernel: [  571.328283]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
Mar 16 20:38:52 aargh kernel: [  571.328286]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
Mar 16 20:38:52 aargh kernel: [  571.328316]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
Mar 16 20:38:52 aargh kernel: [  571.328398]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
Mar 16 20:38:52 aargh kernel: [  571.328436]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
Mar 16 20:38:52 aargh kernel: [  571.328481]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
Mar 16 20:38:52 aargh kernel: [  571.328490]  [<ffffffff81094679>] kthread+0xc9/0xe0
Mar 16 20:38:52 aargh kernel: [  571.328493]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:52 aargh kernel: [  571.328502]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
Mar 16 20:38:52 aargh kernel: [  571.328504]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 16 20:38:52 aargh kernel: [  571.328507] ---[ end trace 3fbf2d3851265ca8 ]---

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-9-generic 3.19.0-9.9
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  stub       1844 F.... pulseaudio
 /dev/snd/controlC0:  stub       1844 F.... pulseaudio
CRDA:
 country SG: DFS-UNSET
 	(2402 - 2482 @ 40), (N/A, 20), (N/A)
 	(5170 - 5250 @ 40), (N/A, 20), (N/A)
 	(5250 - 5330 @ 40), (N/A, 20), (0 ms), DFS
 	(5735 - 5835 @ 40), (N/A, 20), (N/A)
Date: Mon Mar 16 20:52:03 2015
HibernationDevice: RESUME=UUID=85d38fc2-ada5-4f5e-83ec-ca176c194dab
InstallationDate: Installed on 2015-03-13 (2 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 0a5c:216c Broadcom Corp. 
 Bus 001 Device 002: ID 064e:c33c Suyin Corp. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Hewlett-Packard HP Pavilion 13 Notebook PC
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-9-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-9-generic N/A
 linux-backports-modules-3.19.0-9-generic  N/A
 linux-firmware                            1.143
SourcePackage: linux
UpgradeStatus: Upgraded to vivid on 2015-03-16 (0 days ago)
dmi.bios.date: 11/13/2014
dmi.bios.vendor: Insyde
dmi.bios.version: F.23
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 2340
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 07.08
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.23:bd11/13/2014:svnHewlett-Packard:pnHPPavilion13NotebookPC:pvr097D120000005F00000400080:rvnHewlett-Packard:rn2340:rvr07.08:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion 13 Notebook PC
dmi.product.version: 097D120000005F00000400080
dmi.sys.vendor: Hewlett-Packard

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

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https://bugs.launchpad.net/bugs/1432659

Title:
  Broadcom BCM43142 Wifi unstable, panics

Status in linux package in Ubuntu:
  New

Bug description:
  This new laptop's wireless connection (Broadcom BCM43142) is
  disconnecting every few minutes. This corresponds to panics and
  tracebacks in the kernel log.

  The laptop was freshly installed with Ubuntu 14.10 (Utopic), and
  disconnections were seen. I then upgraded it to Ubuntu 15.04 (Vivid
  developement release), and am still experiencing the problem. The
  Broadcom proprietary driver is being used, and seems to be the only
  one available for this device.

  
  Mar 16 20:38:38 aargh kernel: [  557.285585] ------------[ cut here ]------------
  Mar 16 20:38:38 aargh kernel: [  557.285646] WARNING: CPU: 0 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
  Mar 16 20:38:38 aargh kernel: [  557.285652] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
  Mar 16 20:38:38 aargh kernel: [  557.285789] CPU: 0 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
  Mar 16 20:38:38 aargh kernel: [  557.285793] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
  Mar 16 20:38:38 aargh kernel: [  557.285798]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
  Mar 16 20:38:38 aargh kernel: [  557.285804]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
  Mar 16 20:38:38 aargh kernel: [  557.285809]  ffff880250909000 ffff88023bfc6a80 0000000000000099 ffff88023bfc6900
  Mar 16 20:38:38 aargh kernel: [  557.285816] Call Trace:
  Mar 16 20:38:38 aargh kernel: [  557.285831]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  Mar 16 20:38:38 aargh kernel: [  557.285841]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  Mar 16 20:38:38 aargh kernel: [  557.285846]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
  Mar 16 20:38:38 aargh kernel: [  557.285873]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
  Mar 16 20:38:38 aargh kernel: [  557.285969]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
  Mar 16 20:38:38 aargh kernel: [  557.286044]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
  Mar 16 20:38:38 aargh kernel: [  557.286122]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
  Mar 16 20:38:38 aargh kernel: [  557.286144]  [<ffffffff81094679>] kthread+0xc9/0xe0
  Mar 16 20:38:38 aargh kernel: [  557.286153]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:38 aargh kernel: [  557.286161]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
  Mar 16 20:38:38 aargh kernel: [  557.286169]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:38 aargh kernel: [  557.286173] ---[ end trace 3fbf2d3851265ca6 ]---
  Mar 16 20:38:44 aargh kernel: [  563.512221] cfg80211: Calling CRDA to update world regulatory domain
  Mar 16 20:38:44 aargh kernel: [  563.514217] cfg80211: World regulatory domain updated:
  Mar 16 20:38:44 aargh kernel: [  563.514220] cfg80211:  DFS Master region: unset
  Mar 16 20:38:44 aargh kernel: [  563.514221] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
  Mar 16 20:38:44 aargh kernel: [  563.514224] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:44 aargh kernel: [  563.514225] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:44 aargh kernel: [  563.514226] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:44 aargh kernel: [  563.514227] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:44 aargh kernel: [  563.514229] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:44 aargh kernel: [  564.255711] ------------[ cut here ]------------
  Mar 16 20:38:44 aargh kernel: [  564.255746] WARNING: CPU: 0 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
  Mar 16 20:38:44 aargh kernel: [  564.255747] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
  Mar 16 20:38:44 aargh kernel: [  564.255799] CPU: 0 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
  Mar 16 20:38:44 aargh kernel: [  564.255801] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
  Mar 16 20:38:44 aargh kernel: [  564.255802]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
  Mar 16 20:38:44 aargh kernel: [  564.255804]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
  Mar 16 20:38:44 aargh kernel: [  564.255805]  ffff880250909000 ffff8802510f6a80 0000000000000099 ffff8802510f6f00
  Mar 16 20:38:44 aargh kernel: [  564.255807] Call Trace:
  Mar 16 20:38:44 aargh kernel: [  564.255812]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  Mar 16 20:38:44 aargh kernel: [  564.255815]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  Mar 16 20:38:44 aargh kernel: [  564.255817]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
  Mar 16 20:38:44 aargh kernel: [  564.255824]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
  Mar 16 20:38:44 aargh kernel: [  564.255851]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
  Mar 16 20:38:44 aargh kernel: [  564.255873]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
  Mar 16 20:38:44 aargh kernel: [  564.255893]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
  Mar 16 20:38:44 aargh kernel: [  564.255896]  [<ffffffff81094679>] kthread+0xc9/0xe0
  Mar 16 20:38:44 aargh kernel: [  564.255898]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:44 aargh kernel: [  564.255901]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
  Mar 16 20:38:44 aargh kernel: [  564.255903]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:44 aargh kernel: [  564.255904] ---[ end trace 3fbf2d3851265ca7 ]---
  Mar 16 20:38:51 aargh kernel: [  570.533932] cfg80211: Calling CRDA to update world regulatory domain
  Mar 16 20:38:51 aargh kernel: [  570.536708] cfg80211: World regulatory domain updated:
  Mar 16 20:38:51 aargh kernel: [  570.536715] cfg80211:  DFS Master region: unset
  Mar 16 20:38:51 aargh kernel: [  570.536718] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
  Mar 16 20:38:51 aargh kernel: [  570.536724] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:51 aargh kernel: [  570.536728] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:51 aargh kernel: [  570.536731] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:51 aargh kernel: [  570.536735] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:51 aargh kernel: [  570.536738] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
  Mar 16 20:38:52 aargh kernel: [  571.328091] ------------[ cut here ]------------
  Mar 16 20:38:52 aargh kernel: [  571.328188] WARNING: CPU: 1 PID: 523 at /build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0 [cfg80211]()
  Mar 16 20:38:52 aargh kernel: [  571.328190] Modules linked in: rfcomm bnep xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 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 nls_iso8859_1 hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi wl(POE) snd_hda_intel intel_rapl iosf_mbi x86_pkg_temp_thermal snd_hda_controller intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hwdep snd_pcm kvm snd_seq_midi snd_seq_midi_event joydev snd_rawmidi rtsx_pci_ms serio_raw snd_seq cfg80211 uvcvideo lpc_ich snd_seq_device videobuf2_vmalloc snd_timer videobuf2_memops videobuf2_core btusb v4l2_common bluetooth videodev media memstick mei_me mei shpchp snd soundcore 8250_fintek hp_accel hp_wireless lis3lv02d input_polldev acpi_pad mac_hid parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_crypt rtsx_pci_sdmmc crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 psmouse ahci libahci r8169 i2c_algo_bit mii rtsx_pci drm_kms_helper drm wmi video
  Mar 16 20:38:52 aargh kernel: [  571.328252] CPU: 1 PID: 523 Comm: wl_event_handle Tainted: P        W  OE  3.19.0-9-generic #9-Ubuntu
  Mar 16 20:38:52 aargh kernel: [  571.328254] Hardware name: Hewlett-Packard HP Pavilion 13 Notebook PC /2340, BIOS F.23 11/13/2014
  Mar 16 20:38:52 aargh kernel: [  571.328256]  ffffffffc0709a78 ffff880250fe3da8 ffffffff817c09b5 0000000000000007
  Mar 16 20:38:52 aargh kernel: [  571.328259]  0000000000000000 ffff880250fe3de8 ffffffff8107595a ffff88008ee99478
  Mar 16 20:38:52 aargh kernel: [  571.328261]  ffff880250909000 ffff88022121bd80 0000000000000099 ffff88022121b780
  Mar 16 20:38:52 aargh kernel: [  571.328264] Call Trace:
  Mar 16 20:38:52 aargh kernel: [  571.328279]  [<ffffffff817c09b5>] dump_stack+0x45/0x57
  Mar 16 20:38:52 aargh kernel: [  571.328283]  [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
  Mar 16 20:38:52 aargh kernel: [  571.328286]  [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
  Mar 16 20:38:52 aargh kernel: [  571.328316]  [<ffffffffc06e5a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
  Mar 16 20:38:52 aargh kernel: [  571.328398]  [<ffffffffc0ad59fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
  Mar 16 20:38:52 aargh kernel: [  571.328436]  [<ffffffffc0ad275a>] wl_event_handler+0x6a/0x230 [wl]
  Mar 16 20:38:52 aargh kernel: [  571.328481]  [<ffffffffc0ad26f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
  Mar 16 20:38:52 aargh kernel: [  571.328490]  [<ffffffff81094679>] kthread+0xc9/0xe0
  Mar 16 20:38:52 aargh kernel: [  571.328493]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:52 aargh kernel: [  571.328502]  [<ffffffff817c7a3c>] ret_from_fork+0x7c/0xb0
  Mar 16 20:38:52 aargh kernel: [  571.328504]  [<ffffffff810945b0>] ? kthread_create_on_node+0x1c0/0x1c0
  Mar 16 20:38:52 aargh kernel: [  571.328507] ---[ end trace 3fbf2d3851265ca8 ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-9-generic 3.19.0-9.9
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  Uname: Linux 3.19.0-9-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.16.2-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  stub       1844 F.... pulseaudio
   /dev/snd/controlC0:  stub       1844 F.... pulseaudio
  CRDA:
   country SG: DFS-UNSET
   	(2402 - 2482 @ 40), (N/A, 20), (N/A)
   	(5170 - 5250 @ 40), (N/A, 20), (N/A)
   	(5250 - 5330 @ 40), (N/A, 20), (0 ms), DFS
   	(5735 - 5835 @ 40), (N/A, 20), (N/A)
  Date: Mon Mar 16 20:52:03 2015
  HibernationDevice: RESUME=UUID=85d38fc2-ada5-4f5e-83ec-ca176c194dab
  InstallationDate: Installed on 2015-03-13 (2 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 0a5c:216c Broadcom Corp. 
   Bus 001 Device 002: ID 064e:c33c Suyin Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Hewlett-Packard HP Pavilion 13 Notebook PC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-9-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-9-generic N/A
   linux-backports-modules-3.19.0-9-generic  N/A
   linux-firmware                            1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-03-16 (0 days ago)
  dmi.bios.date: 11/13/2014
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.23
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 2340
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 07.08
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsyde:bvrF.23:bd11/13/2014:svnHewlett-Packard:pnHPPavilion13NotebookPC:pvr097D120000005F00000400080:rvnHewlett-Packard:rn2340:rvr07.08:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion 13 Notebook PC
  dmi.product.version: 097D120000005F00000400080
  dmi.sys.vendor: Hewlett-Packard

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