kernel-packages team mailing list archive

[Seth Forshee <seth.forshee+lp@xxxxxxxxxxxxx>]

I'm not necessarily implying that the access point is the problem. It
might be, or it might be doing something legitimate that Linux doesn't
handle correctly. But the problem definitely seems to be related to that
specific AP.

I'm going to need some more data. Please download the following script:

http://people.canonical.com/~sforshee/wifi-debug

Open a terminal and navigate to the location where you saved it, then
run "chmod +x wifi-debug" to make it executable. Also run "sudo apt-get
install iw tshark" to make sure you have the programs required by wifi-
debug.

Now run "sudo ./wifi-debug -p". While this is running, click on the
network indicator and then the name of your network to restart the
connection. Wait for the connection to drop, then press Ctrl-C to stop
wifi-debug. When it is finished you should have a file named wifi-debug-
files.tar.gz in the same location. Please attach that file to this bug.

One warning: this is going to capture network activity on your wireless
interface. As long as you're AP is set up to use WPA security all the
data should be encrypted, but if you're concerned about it you should
avoid transmitting any sensitive information while wifi-debug is
running. Or you can remove the -p option to disable collection of
network activity, but without that data it will probably be difficult to
determine what is going on.

Thanks!

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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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:
  Incomplete

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.
  --- 
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  matt       1741 F.... pulseaudio
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=0404fe13-269c-4920-b251-780a13c73d41
  InstallationDate: Installed on 2012-10-25 (447 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.1)
  MachineType: Dell Inc. Dell System XPS L321X
  MarkForUpload: True
  Package: linux (not installed)
  ProcFB:
   0 inteldrmfb
   1 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-15-generic root=UUID=38343316-9ddb-46e9-b4d4-d84629dd20bc ro quiet splash i915.i915_enable_fbc=1 vt.handoff=7
  ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-15-generic N/A
   linux-backports-modules-3.11.0-15-generic  N/A
   linux-firmware                             1.116.1
  Tags:  saucy
  Uname: Linux 3.11.0-15-generic i686
  UpgradeStatus: Upgraded to saucy on 2014-01-14 (1 days ago)
  UserGroups: adm cdrom dip fuse lpadmin plugdev sambashare sudo
  dmi.bios.date: 07/02/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 085X6F
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd07/02/2012:svnDellInc.:pnDellSystemXPSL321X:pvr:rvnDellInc.:rn085X6F:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L321X
  dmi.sys.vendor: Dell Inc.

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