iwlwifi Intel Centrino Advanced-N 6230 Wifi disconnects

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.17 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc6-utopic/

Also, was there a prior Ubuntu release that did not have this bug?

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1372616

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

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I updated to the kernel 3.17-rc6. The problem persisted.

Here the dmesg output:
   55.760002] init: gdm main process (2274) killed by TERM signal
[ 438.174854] wlan0: deauthenticated from 00:1f:3f:d0:95:b3 (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
[ 438.200403] cfg80211: Calling CRDA to update world regulatory domain
[ 438.214870] wlan0: authenticate with 00:1f:3f:d0:95:b3
[ 438.218467] wlan0: send auth to 00:1f:3f:d0:95:b3 (try 1/3)
[ 438.220605] wlan0: authenticated
[ 438.220743] cfg80211: World regulatory domain updated:
[ 438.220747] cfg80211: DFS Master region: unset
[ 438.220750] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 438.220754] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 438.220758] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 438.220761] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 438.220764] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 438.220768] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 438.224150] wlan0: associate with 00:1f:3f:d0:95:b3 (try 1/3)
[ 438.228102] wlan0: RX AssocResp from 00:1f:3f:d0:95:b3 (capab=0x431 status=0 aid=1)
[ 438.231393] wlan0: associated
[ 534.965330] wlan0: deauthenticated from 00:1f:3f:d0:95:b3 (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
[ 534.986844] cfg80211: Calling CRDA to update world regulatory domain
[ 535.023047] cfg80211: World regulatory domain updated:
[ 535.023055] cfg80211: DFS Master region: unset
[ 535.023060] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 535.023068] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 535.023075] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 535.023081] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 535.023087] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 535.023093] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)

Joseph Salisbury: Wifi worked well with 13.10. I don't know if it worked with 14.04, I directly updated to 14.10.

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

Also, we can perform a kernel bisect to identify the commit that introduced this regression. Can you install the 3.13 that Trusty uses and see if this bug still exists? It can be downloaded from:

https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/6319857

You would need to install both the linux-image and linux-image-extra .deb packages.

For me, 14.04 works fine. The wifi becomes unstable after my update, upgrade, dist-upgrade yesterday. I tried roll back to previous known working kernel, but issue persist.

Current kernel:
Linux x230 3.16.0-22-generic #29-Ubuntu SMP Thu Oct 9 16:26:18 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

ApportVersion: 2.14.7-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: shang 3560 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.10
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=7290408a-d703-475b-aa38-75ceb1628aa9
InstallationDate: Installed on 2013-08-25 (415 days ago)
InstallationMedia: This
MachineType: LENOVO 2320KBV
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-22-generic root=UUID=41bf11ce-257e-4c13-9ec3-788c9e23b4fa ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-22-generic N/A
 linux-backports-modules-3.16.0-22-generic N/A
 linux-firmware 1.136
Tags: utopic
Uname: Linux 3.16.0-22-generic x86_64
UpgradeStatus: Upgraded to utopic on 2014-09-28 (17 days ago)
UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 12/04/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G2ET99WW (2.59 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2320KBV
dmi.board.vendor: LENOVO
dmi.board.version: Win8 Pro DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG2ET99WW(2.59):bd12/04/2013:svnLENOVO:pn2320KBV:pvrThinkPadX230:rvnLENOVO:rn2320KBV:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2320KBV
dmi.product.version: ThinkPad X230
dmi.sys.vendor: LENOVO

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Kernel OOPS message:

Oct 15 11:37:01 x230 kernel: [ 5719.889746] Call Trace:
Oct 15 11:37:01 x230 kernel: [ 5719.889755] [<ffffffff8177fcbc>] dump_stack+0x45/0x56
Oct 15 11:37:01 x230 kernel: [ 5719.889769] [<ffffffffc071e68f>] iwl_trans_pcie_send_hcmd+0x41f/0x580 [iwlwifi]
Oct 15 11:37:01 x230 kernel: [ 5719.889776] [<ffffffff810b9590>] ? prepare_to_wait_event+0x100/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.889788] [<ffffffffc081b81a>] iwl_dvm_send_cmd+0x5a/0x150 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889798] [<ffffffffc0828ade>] iwl6000_hw_channel_switch+0x15e/0x1e0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889808] [<ffffffffc08269b5>] ? iwl_set_rxon_ht+0x115/0x1a0 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889816] [<ffffffffc0814f77>] iwlagn_mac_channel_switch+0x167/0x210 [iwldvm]
Oct 15 11:37:01 x230 kernel: [ 5719.889839] [<ffffffffc0783bfc>] ieee80211_sta_process_chanswitch+0x27c/0x370 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889859] [<ffffffffc0786223>] ieee80211_rx_mgmt_beacon+0x393/0x1060 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889864] [<ffffffff81175292>] ? write_cache_pages+0x112/0x480
Oct 15 11:37:01 x230 kernel: [ 5719.889868] [<ffffffff810b249c>] ? update_group_capacity+0x19c/0x290
Oct 15 11:37:01 x230 kernel: [ 5719.889890] [<ffffffffc07883f3>] ieee80211_sta_rx_queued_mgmt+0x2f3/0x570 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889893] [<ffffffff810b2fb5>] ? load_balance+0x195/0x8b0
Oct 15 11:37:01 x230 kernel: [ 5719.889899] [<ffffffff8109e178>] ? update_rq_clock.part.73+0x18/0x40
Oct 15 11:37:01 x230 kernel: [ 5719.889904] [<ffffffff8101c88e>] ? native_sched_clock+0x2e/0xa0
Oct 15 11:37:01 x230 kernel: [ 5719.889908] [<ffffffff8101c909>] ? sched_clock+0x9/0x10
Oct 15 11:37:01 x230 kernel: [ 5719.889913] [<ffffffff810a85cd>] ? sched_clock_cpu+0x9d/0xb0
Oct 15 11:37:01 x230 kernel: [ 5719.889916] [<ffffffff810b0601>] ? put_prev_entity+0x31/0x440
Oct 15 11:37:01 x230 kernel: [ 5719.889933] [<ffffffffc075549c>] ieee80211_iface_work+0x25c/0x370 [mac80211]
Oct 15 11:37:01 x230 kernel: [ 5719.889937] [<ffffffff8108d8e2>] process_one_work+0x182/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.889941] [<ffffffff8108dcab>] worker_thread+0x6b/0x6a0
Oct 15 11:37:01 x230 kernel: [ 5719.889944] [<ffffffff8108dc40>] ? process_one_work+0x4e0/0x4e0
Oct 15 11:37:01 x230 kernel: [ 5719.889948] [<ffffffff81094aeb>] kthread+0xdb/0x100
Oct 15 11:37:01 x230 kernel: [ 5719.889953] [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.889958] [<ffffffff81787c3c>] ret_from_fork+0x7c/0xb0
Oct 15 11:37:01 x230 kernel: [ 5719.889962] [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
Oct 15 11:37:01 x230 kernel: [ 5719.889966] wlan0: driver channel switch failed, disconnecting
Oct 15 11:37:01 x230 kernel: [ 5719.890359] iwlwifi 0000:03:00.0: iwl_trans_wait_tx_queue_empty bad state = 0
Oct 15 11:37:01 x230 kernel: [ 5719.890365] ieee80211 phy0: Hardware restart was requested
Oct 15 11:37:01 x230 kernel: [ 5719.890375] iwlwifi 0000:03:00.0: iwl_trans_wait_tx_queue_empty bad state = 0
Oct 15 11:37:01 x230 kernel: [ 5719.890383] iwlwifi 0000:03:00.0: Fw not loaded -...

What I was doing before this happen? Nothing, leave the machine unattended for 20 ~ 30 mins.

See here:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1319630