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[Matthieu TC <1269441@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

A few times a day, my connection will drop and the network manager
applet is telling me that there is no problem. However, I can no longer
connect to my wifi router or the outside internet.

In the syslog I see the following call trace:

Jan 14 16:34:10 hostname NetworkManager[1530]: <info> (wlan0): supplicant interface state: scanning -> authenticating
Jan 14 16:34:10 hostname NetworkManager[1530]: <info> (wlan0): supplicant interface state: authenticating -> associating
Jan 14 16:34:10 hostname kernel: [ 6589.140154] wlan0: RX AssocResp from a0:ec:80:4f:f5:c8 (capab=0x431 status=0 aid=1)
Jan 14 16:34:10 hostname kernel: [ 6589.143422] ------------[ cut here ]------------
Jan 14 16:34:10 hostname kernel: [ 6589.143463] WARNING: CPU: 2 PID: 26219 at /build/buildd/linux-3.11.0/drivers/net/wireless/iwlwifi/pcie/tx.c:1490 iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]()
Jan 14 16:34:10 hostname kernel: [ 6589.143467] Modules linked in: pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) cuse parport_pc snd_hda_codec_hdmi joydev ppdev snd_hda_codec_realtek x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crc32_pclmul aesni_intel aes_i586 xts lrw gf128mul ablk_helper cryptd dell_wmi sparse_keymap uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev dell_laptop dcdbas btusb microcode arc4 rfcomm iwldvm bnep mac80211 bluetooth psmouse serio_raw iwlwifi snd_hda_intel snd_hda_codec cfg80211 snd_hwdep snd_pcm wmi snd_page_alloc i915 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq video snd_seq_device binfmt_misc drm_kms_helper snd_timer drm snd mei_me i2c_algo_bit soundcore mei lpc_ich mac_hid lp parport ahci libahci
Jan 14 16:34:10 hostname kernel: [ 6589.143594] CPU: 2 PID: 26219 Comm: kworker/u16:1 Tainted: GF          O 3.11.0-15-generic #23-Ubuntu
Jan 14 16:34:10 hostname kernel: [ 6589.143600] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A06 07/02/2012
Jan 14 16:34:10 hostname kernel: [ 6589.143651] Workqueue: phy0 ieee80211_iface_work [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.143659]  00000000 00000000 f64318cc c1627228 00000000 f64318fc c105267e c17f95f0
Jan 14 16:34:10 hostname kernel: [ 6589.143681]  00000002 0000666b f882f210 000005d2 f88218d6 f88218d6 f2c20000 00000077
Jan 14 16:34:10 hostname kernel: [ 6589.143702]  f6431984 f643190c c1052742 00000009 00000000 f6431958 f88218d6 f3761064
Jan 14 16:34:10 hostname kernel: [ 6589.143719] Call Trace:
Jan 14 16:34:10 hostname kernel: [ 6589.143733]  [<c1627228>] dump_stack+0x41/0x52
Jan 14 16:34:10 hostname kernel: [ 6589.143745]  [<c105267e>] warn_slowpath_common+0x7e/0xa0
Jan 14 16:34:10 hostname kernel: [ 6589.143767]  [<f88218d6>] ? iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
Jan 14 16:34:10 hostname kernel: [ 6589.143784]  [<f88218d6>] ? iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
Jan 14 16:34:10 hostname kernel: [ 6589.143792]  [<c1052742>] warn_slowpath_null+0x22/0x30
Jan 14 16:34:10 hostname kernel: [ 6589.143808]  [<f88218d6>] iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
Jan 14 16:34:10 hostname kernel: [ 6589.143836]  [<f9415af3>] iwl_dvm_send_cmd+0x43/0x130 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143855]  [<f9415edf>] iwl_dvm_send_cmd_pdu+0x3f/0x50 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143875]  [<f941e18a>] iwl_power_set_mode+0x1fa/0x340 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143896]  [<f941e366>] iwl_power_update_mode+0x96/0x150 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143916]  [<f9421dda>] iwlagn_commit_rxon+0xc5a/0xe20 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143936]  [<f942223d>] iwlagn_mac_config+0x24d/0x3a0 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.143976]  [<f94de67d>] ieee80211_hw_config+0x5d/0x2e0 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.143990]  [<c1629fa9>] ? mutex_unlock+0x19/0x20
Jan 14 16:34:10 hostname kernel: [ 6589.144016]  [<f94225c3>] ? iwlagn_bss_info_changed+0x233/0x590 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.144110]  [<f9505d9e>] ieee80211_recalc_smps_chanctx+0x7e/0x2b0 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144139]  [<f9422390>] ? iwlagn_mac_config+0x3a0/0x3a0 [iwldvm]
Jan 14 16:34:10 hostname kernel: [ 6589.144183]  [<f94de902>] ? ieee80211_bss_info_change_notify+0x2/0x1a0 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144244]  [<f95047c4>] ieee80211_recalc_smps+0x34/0x60 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144309]  [<f9516efe>] ieee80211_assoc_success+0x5fe/0xac0 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144329]  [<c162387d>] ? printk+0x50/0x52
Jan 14 16:34:10 hostname kernel: [ 6589.144392]  [<f951750a>] ieee80211_rx_mgmt_assoc_resp+0x14a/0x280 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144459]  [<f9517d70>] ieee80211_sta_rx_queued_mgmt+0x340/0x5e0 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144478]  [<c100e840>] ? __switch_to+0xb0/0x330
Jan 14 16:34:10 hostname kernel: [ 6589.144489]  [<c107be71>] ? finish_task_switch+0x41/0xc0
Jan 14 16:34:10 hostname kernel: [ 6589.144502]  [<c1045128>] ? default_spin_lock_flags+0x8/0x10
Jan 14 16:34:10 hostname kernel: [ 6589.144553]  [<f94ed052>] ieee80211_iface_work+0x222/0x310 [mac80211]
Jan 14 16:34:10 hostname kernel: [ 6589.144569]  [<c1069ed8>] process_one_work+0x118/0x380
Jan 14 16:34:10 hostname kernel: [ 6589.144582]  [<c106a9e1>] worker_thread+0x101/0x340
Jan 14 16:34:10 hostname kernel: [ 6589.144595]  [<c106a8e0>] ? manage_workers.isra.27+0x250/0x250
Jan 14 16:34:10 hostname kernel: [ 6589.144606]  [<c10700b4>] kthread+0x94/0xa0
Jan 14 16:34:10 hostname kernel: [ 6589.144617]  [<c1070000>] ? kthread_create_on_node+0xa0/0xc0
Jan 14 16:34:10 hostname kernel: [ 6589.144633]  [<c1634937>] ret_from_kernel_thread+0x1b/0x28
Jan 14 16:34:10 hostname kernel: [ 6589.144643]  [<c1070020>] ? kthread_create_on_node+0xc0/0xc0
Jan 14 16:34:10 hostname kernel: [ 6589.144653] ---[ end trace 3d9a5f6a5d7e4198 ]---
Jan 14 16:34:10 hostname kernel: [ 6589.144665] iwlwifi 0000:02:00.0: Command POWER_TABLE_CMD: a command is already active!
Jan 14 16:34:10 hostname kernel: [ 6589.144676] iwlwifi 0000:02:00.0: set power fail, ret = -5
Jan 14 16:34:10 hostname kernel: [ 6589.144693] wlan0: associated

Rebooting the router and the computer allows me to connect again to the
wifi.

I'm on Ubuntu 13.10.

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

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https://bugs.launchpad.net/bugs/1269441

Title:
  Connection drops though network manager reports everything as OK

Status in “linux” package in Ubuntu:
  New

Bug description:
  A few times a day, my connection will drop and the network manager
  applet is telling me that there is no problem. However, I can no
  longer connect to my wifi router or the outside internet.

  In the syslog I see the following call trace:

  Jan 14 16:34:10 hostname NetworkManager[1530]: <info> (wlan0): supplicant interface state: scanning -> authenticating
  Jan 14 16:34:10 hostname NetworkManager[1530]: <info> (wlan0): supplicant interface state: authenticating -> associating
  Jan 14 16:34:10 hostname kernel: [ 6589.140154] wlan0: RX AssocResp from a0:ec:80:4f:f5:c8 (capab=0x431 status=0 aid=1)
  Jan 14 16:34:10 hostname kernel: [ 6589.143422] ------------[ cut here ]------------
  Jan 14 16:34:10 hostname kernel: [ 6589.143463] WARNING: CPU: 2 PID: 26219 at /build/buildd/linux-3.11.0/drivers/net/wireless/iwlwifi/pcie/tx.c:1490 iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]()
  Jan 14 16:34:10 hostname kernel: [ 6589.143467] Modules linked in: pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) cuse parport_pc snd_hda_codec_hdmi joydev ppdev snd_hda_codec_realtek x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crc32_pclmul aesni_intel aes_i586 xts lrw gf128mul ablk_helper cryptd dell_wmi sparse_keymap uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev dell_laptop dcdbas btusb microcode arc4 rfcomm iwldvm bnep mac80211 bluetooth psmouse serio_raw iwlwifi snd_hda_intel snd_hda_codec cfg80211 snd_hwdep snd_pcm wmi snd_page_alloc i915 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq video snd_seq_device binfmt_misc drm_kms_helper snd_timer drm snd mei_me i2c_algo_bit soundcore mei lpc_ich mac_hid lp parport ahci libahci
  Jan 14 16:34:10 hostname kernel: [ 6589.143594] CPU: 2 PID: 26219 Comm: kworker/u16:1 Tainted: GF          O 3.11.0-15-generic #23-Ubuntu
  Jan 14 16:34:10 hostname kernel: [ 6589.143600] Hardware name: Dell Inc.          Dell System XPS L321X/085X6F, BIOS A06 07/02/2012
  Jan 14 16:34:10 hostname kernel: [ 6589.143651] Workqueue: phy0 ieee80211_iface_work [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.143659]  00000000 00000000 f64318cc c1627228 00000000 f64318fc c105267e c17f95f0
  Jan 14 16:34:10 hostname kernel: [ 6589.143681]  00000002 0000666b f882f210 000005d2 f88218d6 f88218d6 f2c20000 00000077
  Jan 14 16:34:10 hostname kernel: [ 6589.143702]  f6431984 f643190c c1052742 00000009 00000000 f6431958 f88218d6 f3761064
  Jan 14 16:34:10 hostname kernel: [ 6589.143719] Call Trace:
  Jan 14 16:34:10 hostname kernel: [ 6589.143733]  [<c1627228>] dump_stack+0x41/0x52
  Jan 14 16:34:10 hostname kernel: [ 6589.143745]  [<c105267e>] warn_slowpath_common+0x7e/0xa0
  Jan 14 16:34:10 hostname kernel: [ 6589.143767]  [<f88218d6>] ? iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
  Jan 14 16:34:10 hostname kernel: [ 6589.143784]  [<f88218d6>] ? iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
  Jan 14 16:34:10 hostname kernel: [ 6589.143792]  [<c1052742>] warn_slowpath_null+0x22/0x30
  Jan 14 16:34:10 hostname kernel: [ 6589.143808]  [<f88218d6>] iwl_trans_pcie_send_hcmd+0x586/0x5f0 [iwlwifi]
  Jan 14 16:34:10 hostname kernel: [ 6589.143836]  [<f9415af3>] iwl_dvm_send_cmd+0x43/0x130 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143855]  [<f9415edf>] iwl_dvm_send_cmd_pdu+0x3f/0x50 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143875]  [<f941e18a>] iwl_power_set_mode+0x1fa/0x340 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143896]  [<f941e366>] iwl_power_update_mode+0x96/0x150 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143916]  [<f9421dda>] iwlagn_commit_rxon+0xc5a/0xe20 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143936]  [<f942223d>] iwlagn_mac_config+0x24d/0x3a0 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.143976]  [<f94de67d>] ieee80211_hw_config+0x5d/0x2e0 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.143990]  [<c1629fa9>] ? mutex_unlock+0x19/0x20
  Jan 14 16:34:10 hostname kernel: [ 6589.144016]  [<f94225c3>] ? iwlagn_bss_info_changed+0x233/0x590 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.144110]  [<f9505d9e>] ieee80211_recalc_smps_chanctx+0x7e/0x2b0 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144139]  [<f9422390>] ? iwlagn_mac_config+0x3a0/0x3a0 [iwldvm]
  Jan 14 16:34:10 hostname kernel: [ 6589.144183]  [<f94de902>] ? ieee80211_bss_info_change_notify+0x2/0x1a0 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144244]  [<f95047c4>] ieee80211_recalc_smps+0x34/0x60 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144309]  [<f9516efe>] ieee80211_assoc_success+0x5fe/0xac0 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144329]  [<c162387d>] ? printk+0x50/0x52
  Jan 14 16:34:10 hostname kernel: [ 6589.144392]  [<f951750a>] ieee80211_rx_mgmt_assoc_resp+0x14a/0x280 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144459]  [<f9517d70>] ieee80211_sta_rx_queued_mgmt+0x340/0x5e0 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144478]  [<c100e840>] ? __switch_to+0xb0/0x330
  Jan 14 16:34:10 hostname kernel: [ 6589.144489]  [<c107be71>] ? finish_task_switch+0x41/0xc0
  Jan 14 16:34:10 hostname kernel: [ 6589.144502]  [<c1045128>] ? default_spin_lock_flags+0x8/0x10
  Jan 14 16:34:10 hostname kernel: [ 6589.144553]  [<f94ed052>] ieee80211_iface_work+0x222/0x310 [mac80211]
  Jan 14 16:34:10 hostname kernel: [ 6589.144569]  [<c1069ed8>] process_one_work+0x118/0x380
  Jan 14 16:34:10 hostname kernel: [ 6589.144582]  [<c106a9e1>] worker_thread+0x101/0x340
  Jan 14 16:34:10 hostname kernel: [ 6589.144595]  [<c106a8e0>] ? manage_workers.isra.27+0x250/0x250
  Jan 14 16:34:10 hostname kernel: [ 6589.144606]  [<c10700b4>] kthread+0x94/0xa0
  Jan 14 16:34:10 hostname kernel: [ 6589.144617]  [<c1070000>] ? kthread_create_on_node+0xa0/0xc0
  Jan 14 16:34:10 hostname kernel: [ 6589.144633]  [<c1634937>] ret_from_kernel_thread+0x1b/0x28
  Jan 14 16:34:10 hostname kernel: [ 6589.144643]  [<c1070020>] ? kthread_create_on_node+0xc0/0xc0
  Jan 14 16:34:10 hostname kernel: [ 6589.144653] ---[ end trace 3d9a5f6a5d7e4198 ]---
  Jan 14 16:34:10 hostname kernel: [ 6589.144665] iwlwifi 0000:02:00.0: Command POWER_TABLE_CMD: a command is already active!
  Jan 14 16:34:10 hostname kernel: [ 6589.144676] iwlwifi 0000:02:00.0: set power fail, ret = -5
  Jan 14 16:34:10 hostname kernel: [ 6589.144693] wlan0: associated

  Rebooting the router and the computer allows me to connect again to
  the wifi.

  I'm on Ubuntu 13.10.

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