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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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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