I do not know how long this has been going on, as of now. But I looked today at /var/log/syslog, it it was pretty much *only* this warning + stacktrace, one after the other, every few seconds. This is the first occurence of it, from a saved syslog: Mar 22 18:29:32 xango3 kernel: [13498.800669] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) Mar 22 18:29:32 xango3 kernel: [13498.800672] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Mar 22 18:29:32 xango3 kernel: [13498.800675] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) Mar 22 18:29:32 xango3 NetworkManager[1649]: (eth1): supplicant interface state: disconnected -> scanning Mar 22 18:29:35 xango3 kernel: [13501.484571] net_ratelimit: 24 callbacks suppressed Mar 22 18:29:36 xango3 wpa_supplicant[1777]: eth1: Trying to associate with 00:7f:28:e9:f9:fb (SSID='beth-el2' freq=2462 MHz) Mar 22 18:29:36 xango3 NetworkManager[1649]: (eth1): supplicant interface state: scanning -> associating Mar 22 18:29:36 xango3 wpa_supplicant[1777]: eth1: CTRL-EVENT-ASSOC-REJECT status_code=16 Mar 22 18:29:37 xango3 NetworkManager[1649]: (eth1): roamed from BSSID 00:7F:28:E9:F9:FB (beth-el2) to (none) ((none)) Mar 22 18:29:41 xango3 kernel: [13507.164978] ------------[ cut here ]------------ Mar 22 18:29:41 xango3 kernel: [13507.165031] WARNING: at /build/buildd/linux-3.8.0/net/wireless/sme.c:642 cfg80211_roamed+0x9a/0xa0 [cfg80211]() Mar 22 18:29:41 xango3 kernel: [13507.165034] Hardware name: Latitude E6410 Mar 22 18:29:41 xango3 kernel: [13507.165036] Modules linked in: usb_storage(F) snd_usb_audio snd_usbmidi_lib hid_generic asix usbnet ebtable_nat(F) ebtables(F) xt_CHECKSUM(F) iptable_mangle(F) pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) ipt_MASQUERADE(F) iptable_nat(F) nf_nat_ipv4(F) bridge(F) stp(F) llc(F) dm_crypt(F) ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) ipt_REJECT(F) xt_LOG(F) bnep xt_limit(F) xt_tcpudp(F) xt_addrtype(F) rfcomm nf_conntrack_ipv4(F) nf_defrag_ipv4(F) uvcvideo xt_state(F) videobuf2_vmalloc videobuf2_memops ip6table_filter(F) ip6_tables(F) videobuf2_core snd_hda_codec_hdmi nf_conntrack_netbios_ns(F) videodev nf_conntrack_broadcast(F) nf_nat_ftp(F) nf_nat(F) joydev(F) lib80211_crypt_tkip nf_conntrack_ftp(F) wl(POF) nf_conntrack(F) snd_hda_codec_idt iptable_filter(F) ip_tables(F) snd_hda_intel x_tables(F) snd_hda_codec binfmt_misc(F) snd_hwdep(F) snd_pcm(F) coretemp snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) kvm_intel snd_rawmidi Mar 22 18:29:41 xango3 kernel: (F) snd_seq(F) lib80211 kvm snd_seq_device(F) snd_timer(F) dell_laptop cfg80211 btusb snd(F) dcdbas bluetooth dell_wmi soundcore(F) psmouse(F) ppdev(F) sparse_keymap microcode(F) mac_hid lpc_ich tpm_tis intel_ips serio_raw(F) parport_pc(F) lp(F) parport(F) hid_logitech_dj usbhid hid nouveau mxm_wmi wmi ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) video(F) i2c_algo_bit ttm drm_kms_helper ahci(F) libahci(F) drm sdhci_pci firewire_ohci firewire_core sdhci e1000e(F) crc_itu_t(F) Mar 22 18:29:41 xango3 kernel: [13507.165164] Pid: 1073, comm: wl_event_handle Tainted: PF O 3.8.0-13-generic #23-Ubuntu Mar 22 18:29:41 xango3 kernel: [13507.165167] Call Trace: Mar 22 18:29:41 xango3 kernel: [13507.165177] [] warn_slowpath_common+0x7f/0xc0 Mar 22 18:29:41 xango3 kernel: [13507.165182] [] warn_slowpath_null+0x1a/0x20 Mar 22 18:29:41 xango3 kernel: [13507.165207] [] cfg80211_roamed+0x9a/0xa0 [cfg80211] Mar 22 18:29:41 xango3 kernel: [13507.165260] [] wl_bss_connect_done.isra.20+0x115/0x1c0 [wl] Mar 22 18:29:41 xango3 kernel: [13507.165305] [] wl_notify_connect_status+0x345/0x460 [wl] Mar 22 18:29:41 xango3 kernel: [13507.165350] [] wl_event_handler+0x55/0x1f0 [wl] Mar 22 18:29:41 xango3 kernel: [13507.165395] [] ? wl_notify_scan_status+0x340/0x340 [wl] Mar 22 18:29:41 xango3 kernel: [13507.165400] [] kthread+0xc0/0xd0 Mar 22 18:29:41 xango3 kernel: [13507.165405] [] ? kthread_create_on_node+0x120/0x120 Mar 22 18:29:41 xango3 kernel: [13507.165411] [] ret_from_fork+0x7c/0xb0 Mar 22 18:29:41 xango3 kernel: [13507.165416] [] ? kthread_create_on_node+0x120/0x120 Mar 22 18:29:41 xango3 kernel: [13507.165419] ---[ end trace 7b2493a9432dccd3 ]--- Mar 22 18:29:41 xango3 kernel: [13507.481641] net_ratelimit: 2 callbacks suppressed Mar 22 18:29:46 xango3 kernel: [13512.534921] ------------[ cut here ]------------ Mar 22 18:29:46 xango3 kernel: [13512.534970] WARNING: at /build/buildd/linux-3.8.0/net/wireless/sme.c:642 cfg80211_roamed+0x9a/0xa0 [cfg80211]() Mar 22 18:29:46 xango3 kernel: [13512.534973] Hardware name: Latitude E6410 Mar 22 18:29:46 xango3 kernel: [13512.534975] Modules linked in: usb_storage(F) snd_usb_audio snd_usbmidi_lib hid_generic asix usbnet ebtable_nat(F) ebtables(F) xt_CHECKSUM(F) iptable_mangle(F) pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) ipt_MASQUERADE(F) iptable_nat(F) nf_nat_ipv4(F) bridge(F) stp(F) llc(F) dm_crypt(F) ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) ipt_REJECT(F) xt_LOG(F) bnep xt_limit(F) xt_tcpudp(F) xt_addrtype(F) rfcomm nf_conntrack_ipv4(F) nf_defrag_ipv4(F) uvcvideo xt_state(F) videobuf2_vmalloc videobuf2_memops ip6table_filter(F) ip6_tables(F) videobuf2_core snd_hda_codec_hdmi nf_conntrack_netbios_ns(F) videodev nf_conntrack_broadcast(F) nf_nat_ftp(F) nf_nat(F) joydev(F) lib80211_crypt_tkip nf_conntrack_ftp(F) wl(POF) nf_conntrack(F) snd_hda_codec_idt iptable_filter(F) ip_tables(F) snd_hda_intel x_tables(F) snd_hda_codec binfmt_misc(F) snd_hwdep(F) snd_pcm(F) coretemp snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) kvm_intel snd_rawmidi Mar 22 18:29:46 xango3 kernel: (F) snd_seq(F) lib80211 kvm snd_seq_device(F) snd_timer(F) dell_laptop cfg80211 btusb snd(F) dcdbas bluetooth dell_wmi soundcore(F) psmouse(F) ppdev(F) sparse_keymap microcode(F) mac_hid lpc_ich tpm_tis intel_ips serio_raw(F) parport_pc(F) lp(F) parport(F) hid_logitech_dj usbhid hid nouveau mxm_wmi wmi ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) video(F) i2c_algo_bit ttm drm_kms_helper ahci(F) libahci(F) drm sdhci_pci firewire_ohci firewire_core sdhci e1000e(F) crc_itu_t(F) Mar 22 18:29:46 xango3 kernel: [13512.535101] Pid: 1073, comm: wl_event_handle Tainted: PF W O 3.8.0-13-generic #23-Ubuntu Mar 22 18:29:46 xango3 kernel: [13512.535104] Call Trace: Mar 22 18:29:46 xango3 kernel: [13512.535114] [] warn_slowpath_common+0x7f/0xc0 Mar 22 18:29:46 xango3 kernel: [13512.535118] [] warn_slowpath_null+0x1a/0x20 Mar 22 18:29:46 xango3 kernel: [13512.535142] [] cfg80211_roamed+0x9a/0xa0 [cfg80211] Mar 22 18:29:46 xango3 kernel: [13512.535193] [] wl_notify_roaming_status+0xb4/0x130 [wl] Mar 22 18:29:46 xango3 kernel: [13512.535238] [] wl_event_handler+0x55/0x1f0 [wl] Mar 22 18:29:46 xango3 kernel: [13512.535283] [] ? wl_notify_scan_status+0x340/0x340 [wl] Mar 22 18:29:46 xango3 kernel: [13512.535289] [] kthread+0xc0/0xd0 Mar 22 18:29:46 xango3 kernel: [13512.535293] [] ? kthread_create_on_node+0x120/0x120 Mar 22 18:29:46 xango3 kernel: [13512.535300] [] ret_from_fork+0x7c/0xb0 Mar 22 18:29:46 xango3 kernel: [13512.535304] [] ? kthread_create_on_node+0x120/0x120 Mar 22 18:29:46 xango3 kernel: [13512.535307] ---[ end trace 7b2493a9432dccd4 ]--- Mar 22 18:29:46 xango3 wpa_supplicant[1777]: eth1: Authentication with 00:7f:28:e9:f9:fb timed out. Mar 22 18:29:46 xango3 NetworkManager[1649]: (eth1): supplicant interface state: associating -> disconnected Mar 22 18:29:47 xango3 kernel: [13513.470207] net_ratelimit: 2 callbacks suppressed Mar 22 18:29:47 xango3 NetworkManager[1649]: (eth1): supplicant interface state: disconnected -> scanning Mar 22 18:29:48 xango3 NetworkManager[1649]: (eth1): link timed out. Mar 22 18:29:48 xango3 NetworkManager[1649]: (eth1): device state change: activated -> failed (reason 'supplicant-timeout') [100 120 11] Mar 22 18:29:48 xango3 NetworkManager[1649]: Activation (eth1) failed for connection 'beth-el2' Mar 22 18:29:48 xango3 dbus[1106]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper) Mar 22 18:29:48 xango3 NetworkManager[1649]: (eth1): device state change: failed -> disconnected (reason 'none') [120 30 0] Mar 22 18:29:48 xango3 NetworkManager[1649]: (eth1): deactivating device (reason 'none') [0] Mar 22 18:29:48 xango3 dbus[1106]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher' Mar 22 18:29:48 xango3 NetworkManager[1649]: (eth1): canceled DHCP transaction, DHCP client pid 2411 Mar 22 18:29:48 xango3 avahi-daemon[1177]: Withdrawing address record for fe80::5eac:4cff:fe53:a47f on eth1. Mar 22 18:29:48 xango3 avahi-daemon[1177]: Leaving mDNS multicast group on interface eth1.IPv6 with address fe80::5eac:4cff:fe53:a47f. Mar 22 18:29:48 xango3 avahi-daemon[1177]: Interface eth1.IPv6 no longer relevant for mDNS. Mar 22 18:29:48 xango3 avahi-daemon[1177]: Withdrawing address record for 192.168.1.128 on eth1. Mar 22 18:29:48 xango3 NetworkManager[1649]: Policy set 'Wired connection 1' (eth0) as default for IPv4 routing and DNS. Mar 22 18:29:48 xango3 avahi-daemon[1177]: Leaving mDNS multicast group on interface eth1.IPv4 with address 192.168.1.128. Mar 22 18:29:48 xango3 avahi-daemon[1177]: Interface eth1.IPv4 no longer relevant for mDNS. Mar 22 18:29:48 xango3 NetworkManager[1649]: Writing DNS information to /sbin/resolvconf Mar 22 18:29:48 xango3 dnsmasq[2365]: setting upstream servers from DBus Mar 22 18:29:48 xango3 dnsmasq[2365]: using nameserver 192.168.1.1#53 Mar 22 18:29:48 xango3 NetworkManager[1649]: Couldn't disconnect supplicant interface: This interface is not connected. Mar 22 18:29:49 xango3 ntpd[2827]: Deleting interface #4 eth1, 192.168.1.128#123, interface stats: received=0, sent=0, dropped=0, active_time=13482 secs Mar 22 18:29:49 xango3 ntpd[2827]: peers refreshed Mar 22 18:29:50 xango3 NetworkManager[1649]: (eth1): supplicant interface state: scanning -> inactive Mar 22 18:29:50 xango3 avahi-daemon[1177]: Joining mDNS multicast group on interface eth1.IPv6 with address fe80::5eac:4cff:fe53:a47f. Mar 22 18:29:50 xango3 avahi-daemon[1177]: New relevant interface eth1.IPv6 for mDNS. Mar 22 18:29:50 xango3 avahi-daemon[1177]: Registering new address record for fe80::5eac:4cff:fe53:a47f on eth1.*. Mar 22 18:29:58 xango3 kernel: [13524.458283] net_ratelimit: 2 callbacks suppressed Mar 22 18:29:59 xango3 kernel: [13525.030862] ------------[ cut here ]------------ Mar 22 18:29:59 xango3 kernel: [13525.030915] WARNING: at /build/buildd/linux-3.8.0/net/wireless/sme.c:642 cfg80211_roamed+0x9a/0xa0 [cfg80211]() Mar 22 18:29:59 xango3 kernel: [13525.030919] Hardware name: Latitude E6410 Mar 22 18:29:59 xango3 kernel: [13525.030921] Modules linked in: usb_storage(F) snd_usb_audio snd_usbmidi_lib hid_generic asix usbnet ebtable_nat(F) ebtables(F) xt_CHECKSUM(F) iptable_mangle(F) pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) ipt_MASQUERADE(F) iptable_nat(F) nf_nat_ipv4(F) bridge(F) stp(F) llc(F) dm_crypt(F) ip6t_REJECT(F) xt_hl(F) ip6t_rt(F) nf_conntrack_ipv6(F) nf_defrag_ipv6(F) ipt_REJECT(F) xt_LOG(F) bnep xt_limit(F) xt_tcpudp(F) xt_addrtype(F) rfcomm nf_conntrack_ipv4(F) nf_defrag_ipv4(F) uvcvideo xt_state(F) videobuf2_vmalloc videobuf2_memops ip6table_filter(F) ip6_tables(F) videobuf2_core snd_hda_codec_hdmi nf_conntrack_netbios_ns(F) videodev nf_conntrack_broadcast(F) nf_nat_ftp(F) nf_nat(F) joydev(F) lib80211_crypt_tkip nf_conntrack_ftp(F) wl(POF) nf_conntrack(F) snd_hda_codec_idt iptable_filter(F) ip_tables(F) snd_hda_intel x_tables(F) snd_hda_codec binfmt_misc(F) snd_hwdep(F) snd_pcm(F) coretemp snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) kvm_intel snd_rawmidi Mar 22 18:29:59 xango3 kernel: (F) snd_seq(F) lib80211 kvm snd_seq_device(F) snd_timer(F) dell_laptop cfg80211 btusb snd(F) dcdbas bluetooth dell_wmi soundcore(F) psmouse(F) ppdev(F) sparse_keymap microcode(F) mac_hid lpc_ich tpm_tis intel_ips serio_raw(F) parport_pc(F) lp(F) parport(F) hid_logitech_dj usbhid hid nouveau mxm_wmi wmi ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) xts(F) lrw(F) gf128mul(F) ablk_helper(F) cryptd(F) video(F) i2c_algo_bit ttm drm_kms_helper ahci(F) libahci(F) drm sdhci_pci firewire_ohci firewire_core sdhci e1000e(F) crc_itu_t(F) Mar 22 18:29:59 xango3 kernel: [13525.031048] Pid: 1073, comm: wl_event_handle Tainted: PF W O 3.8.0-13-generic #23-Ubuntu Mar 22 18:29:59 xango3 kernel: [13525.031051] Call Trace: Mar 22 18:29:59 xango3 kernel: [13525.031060] [] warn_slowpath_common+0x7f/0xc0 Mar 22 18:29:59 xango3 kernel: [13525.031065] [] warn_slowpath_null+0x1a/0x20 Mar 22 18:29:59 xango3 kernel: [13525.031089] [] cfg80211_roamed+0x9a/0xa0 [cfg80211] Mar 22 18:29:59 xango3 kernel: [13525.031138] [] wl_bss_connect_done.isra.20+0x115/0x1c0 [wl] Mar 22 18:29:59 xango3 kernel: [13525.031183] [] wl_notify_connect_status+0x345/0x460 [wl] Mar 22 18:29:59 xango3 kernel: [13525.031228] [] wl_event_handler+0x55/0x1f0 [wl] Mar 22 18:29:59 xango3 kernel: [13525.031344] [] ? wl_notify_scan_status+0x340/0x340 [wl] Mar 22 18:29:59 xango3 kernel: [13525.031364] [] kthread+0xc0/0xd0 Mar 22 18:29:59 xango3 kernel: [13525.031380] [] ? kthread_create_on_node+0x120/0x120 Mar 22 18:29:59 xango3 kernel: [13525.031387] [] ret_from_fork+0x7c/0xb0 Mar 22 18:29:59 xango3 kernel: [13525.031392] [] ? kthread_create_on_node+0x120/0x120 ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6 ProcVersionSignature: Ubuntu 3.8.0-14.24-generic 3.8.4 Uname: Linux 3.8.0-14-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.9.2-0ubuntu2 Architecture: amd64 Date: Sat Mar 23 20:57:22 2013 EcryptfsInUse: Yes InstallationDate: Installed on 2013-02-10 (41 days ago) InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130209) MarkForUpload: True SourcePackage: bcmwl UpgradeStatus: No upgrade log present (probably fresh install)