I hadn't sent this, because I'd thought I was only getting WARNINGs on my
Virtualbox-tainted kernel, but this happened untainted, so here you go. Hope
it helps!
-Ken
[ 198.113130] wlan0: deauthenticating from 00:27:0d:98:d1:f1 by local choice
(reason=3)
[ 198.113277] ------------[ cut here ]------------
[ 198.113313] WARNING: at net/wireless/mlme.c:309
__cfg80211_auth_remove+0x56/0xa0 [cfg80211]()
[ 198.113317] Hardware name: EC14 Series
[ 198.113320] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat binfmt_misc
ppdev snd_hda_codec_hdmi snd_hda_codec_realtek joydev snd_hda_intel
snd_hda_codec arc4 snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm usb_storage
snd_seq_dummy uvcvideo videodev snd_seq_oss fbcon tileblit snd_seq_midi i915
snd_rawmidi iwlwifi font bitblit snd_seq_midi_event softcursor snd_seq psmouse
snd_timer snd_seq_device serio_raw mac80211 drm_kms_helper acer_wmi drm
sparse_keymap atl1c i2c_algo_bit cfg80211 intel_agp snd intel_gtt agpgart
soundcore video snd_page_alloc lp parport
[ 198.113397] Pid: 44, comm: kworker/u:3 Not tainted 3.1.0+ #1
[ 198.113401] Call Trace:
[ 198.113412] [<c068e057>] ? printk+0x1d/0x1f
[ 198.113423] [<c01562b2>] warn_slowpath_common+0x72/0xa0
[ 198.113439] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
[ 198.113454] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
[ 198.113461] [<c0156302>] warn_slowpath_null+0x22/0x30
[ 198.113480] [<f8cbc1e6>] __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
[ 198.113496] [<f8cbc2ae>] cfg80211_send_auth_timeout+0x5e/0xc0 [cfg80211]
[ 198.113518] [<f868f796>] ieee80211_probe_auth_done+0xe6/0xf0 [mac80211]
[ 198.113525] [<c014f614>] ? wake_up_process+0x14/0x20
[ 198.113532] [<c06976ec>] ? __mutex_unlock_slowpath+0x3c/0x50
[ 198.113552] [<f86929bb>] ieee80211_work_work+0x47b/0x12d0 [mac80211]
[ 198.113559] [<c0134c58>] ? default_spin_lock_flags+0x8/0x10
[ 198.113566] [<c0698701>] ? _raw_spin_trylock_bh+0x1/0x30
[ 198.113575] [<c017043e>] process_one_work+0xfe/0x3a0
[ 198.113580] [<c014f614>] ? wake_up_process+0x14/0x20
[ 198.113586] [<c016dfe5>] ? start_worker+0x25/0x30
[ 198.113605] [<f8692540>] ? free_work+0x20/0x20 [mac80211]
[ 198.113612] [<c0170f74>] worker_thread+0x124/0x2d0
[ 198.113618] [<c0170e50>] ? manage_workers.isra.28+0x1e0/0x1e0
[ 198.113624] [<c0174ced>] kthread+0x6d/0x80
[ 198.113630] [<c0174c80>] ? flush_kthread_worker+0x80/0x80
[ 198.113637] [<c069fb06>] kernel_thread_helper+0x6/0x10
[ 198.113642] ---[ end trace 04bdbdc199f6d75f ]---
Hi. For reasons pertaining to btrfs, I'm running 3.1+ kernels, and the wifi
on my system now flakes out sporadically, but reliably. It can sometimes run
for a couple days, but other days (like, say, yesterday) it'll fail upwards of
30 times. Simply attempting to re-acquire a connection via Network Manager
fails 100%. I need to rmmod and modprobe the iwlwifi module, and then am able
to immediately connect, 100% of the time -- albeit, briefly. Rebooting under
these circumstances seems to have as much affect as reloading the module. (I
wonder if there's something that changes on the WAP side that triggers this?
That would explain the occasional doses of extended uptime, followed by days of
misery, regardless of reboots and module playing.)
While the behavior, sadly, *is* sporadic, when
- it's not a problem on older (distribution-supplied) kernels, and
- reloading -- and only reloading -- the module fixes it, however briefly,
it seems to me it's probably a problem with the module.
Here's some additional information:
* Happens on multiple WAPs (home, hotel, work, etc.)
* 02:00.0 Network controller: Intel Corporation WiFi Link 1000 Series
* The system *thinks* everything is fine -- NetworkManager happily shows all
the WAPs, etc. -- but I'm unable to re-acquire them until I reload the module.
* kernel 3.1.0+, untainted (Chris Mason's btrfs git pull from three weeks ago;
also experienced with slightly older, post 3.x kernels)
* Seems to fail most quickly under load (e.g., streaming); can push an hour if
doing relatively little
* I'm unsure which kernel rev. was the tipping point, but Ubuntu 10.04
generally "just worked," and is what I'm booted to now off of USB -- 2.6.32.
I'd give you dmesg messages, but I'm -- catch-22 -- Ubuntu 10.04 won't mount my
btrfs partition, but runs WiFi flawlessly. If you need those messages, just
let me know, and I'll pull them off.
If there's anything else I can help out with, please don't hesitate to let me
know.
Thanks!
-Ken
Second followup: just died again, but with a different dmesg error:
[ 7948.686417] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7948.686544] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7948.686591] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7948.687146] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7948.717489] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7948.717800] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691091] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691229] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691277] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691319] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691359] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.691903] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.739840] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 7977.740126] [drm:i915_gem_mmap_gtt] *ERROR* Attempting to mmap a purgeable
buffer
[ 8662.475775] wlan0: deauthenticated from 18:ef:63:58:a4:c1 (Reason: 1)
[ 8662.483725] iwlwifi 0000:02:00.0: Stopping AGG while state not ON or
starting for 0 on 0 (0)
[ 8662.496485] cfg80211: All devices are disconnected, going to restore
regulatory settings
[ 8662.496493] cfg80211: Restoring regulatory settings
[ 8662.496500] cfg80211: Calling CRDA to update world regulatory domain
[ 8662.500873] cfg80211: Ignoring regulatory request Set by core since the
driver uses its own custom regulatory domain
[ 8662.500880] cfg80211: World regulatory domain updated:
[ 8662.500883] cfg80211: (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp)
[ 8662.500889] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi,
2000 mBm)
[ 8662.500894] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi,
2000 mBm)
[ 8662.500899] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi,
2000 mBm)
[ 8662.500903] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi,
2000 mBm)
[ 8662.500908] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi,
2000 mBm)
[ 8662.900200] wlan0: authenticate with 18:ef:63:58:a4:c1 (try 1)
[ 8662.903621] wlan0: authenticated
[ 8662.903716] wlan0: waiting for beacon from 18:ef:63:58:a4:c1
[ 8662.977778] wlan0: beacon received
[ 8663.025447] wlan0: associate with 18:ef:63:58:a4:c1 (try 1)
[ 8663.028790] wlan0: RX AssocResp from 18:ef:63:58:a4:c1 (capab=0x421
status=17 aid=0)
[ 8663.028796] wlan0: 18:ef:63:58:a4:c1 denied association (code=17)
[ 8663.076089] wlan0: deauthenticating from 18:ef:63:58:a4:c1 by local choice
(reason=3)
[ 8673.259431] wlan0: authenticate with 00:27:0d:98:d1:f1 (try 1)
[ 8673.259472] wlan0: deauthenticating from 00:27:0d:98:d1:f1 by local choice
(reason=3)
[ 8688.305183] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting
0x2000000.
[ 8688.305192] iwlwifi 0000:02:00.0: Loaded firmware version: 128.50.3.1 build
13488
[ 8688.305308] iwlwifi 0000:02:00.0: Start IWL Error Log Dump:
[ 8688.305314] iwlwifi 0000:02:00.0: Status: 0x0004B2E5, count: 5
[ 8688.305321] iwlwifi 0000:02:00.0: 0x00000005 | SYSASSERT
[ 8688.305327] iwlwifi 0000:02:00.0: 0x000133F8 | uPc
[ 8688.305331] iwlwifi 0000:02:00.0: 0x000133D6 | branchlink1
[ 8688.305337] iwlwifi 0000:02:00.0: 0x000133D6 | branchlink2
[ 8688.305342] iwlwifi 0000:02:00.0: 0x00000892 | interruptlink1
[ 8688.305347] iwlwifi 0000:02:00.0: 0x00000000 | interruptlink2
[ 8688.305353] iwlwifi 0000:02:00.0: 0x24020080 | data1
[ 8688.305358] iwlwifi 0000:02:00.0: 0x00000000 | data2
[ 8688.305363] iwlwifi 0000:02:00.0: 0x00000072 | line
[ 8688.305368] iwlwifi 0000:02:00.0: 0x00018C25 | beacon time
[ 8688.305373] iwlwifi 0000:02:00.0: 0x000003DB | tsf low
[ 8688.305378] iwlwifi 0000:02:00.0: 0x00000000 | tsf hi
[ 8688.305383] iwlwifi 0000:02:00.0: 0x00000000 | time gp1
[ 8688.305388] iwlwifi 0000:02:00.0: 0xE09B27CE | time gp2
[ 8688.305394] iwlwifi 0000:02:00.0: 0x00000000 | time gp3
[ 8688.305399] iwlwifi 0000:02:00.0: 0x00018032 | uCode version
[ 8688.305404] iwlwifi 0000:02:00.0: 0x00000000 | hw version
[ 8688.305409] iwlwifi 0000:02:00.0: 0x00880300 | board version
[ 8688.305415] iwlwifi 0000:02:00.0: 0x04670077 | hcmd
[ 8688.305420] iwlwifi 0000:02:00.0: CSR values:
[ 8688.305424] iwlwifi 0000:02:00.0: (2nd byte of CSR_INT_COALESCING is
CSR_INT_PERIODIC_REG)
[ 8688.305453] iwlwifi 0000:02:00.0: CSR_HW_IF_CONFIG_REG: 0X00880300
[ 8688.305480] iwlwifi 0000:02:00.0: CSR_INT_COALESCING: 0X0000ff40
[ 8688.305506] iwlwifi 0000:02:00.0: CSR_INT: 0X00000000
[ 8688.305533] iwlwifi 0000:02:00.0: CSR_INT_MASK: 0X00000000
[ 8688.305559] iwlwifi 0000:02:00.0: CSR_FH_INT_STATUS: 0X00000000
[ 8688.305586] iwlwifi 0000:02:00.0: CSR_GPIO_IN: 0X00000000
[ 8688.305612] iwlwifi 0000:02:00.0: CSR_RESET: 0X00000000
[ 8688.305640] iwlwifi 0000:02:00.0: CSR_GP_CNTRL: 0X080403c5
[ 8688.305666] iwlwifi 0000:02:00.0: CSR_HW_REV: 0X0000006c
[ 8688.305693] iwlwifi 0000:02:00.0: CSR_EEPROM_REG: 0X007708e5
[ 8688.305719] iwlwifi 0000:02:00.0: CSR_EEPROM_GP: 0X90000001
[ 8688.305746] iwlwifi 0000:02:00.0: CSR_OTP_GP_REG: 0X00010001
[ 8688.305773] iwlwifi 0000:02:00.0: CSR_GIO_REG: 0X00080042
[ 8688.305800] iwlwifi 0000:02:00.0: CSR_GP_UCODE_REG: 0X00004467
[ 8688.305826] iwlwifi 0000:02:00.0: CSR_GP_DRIVER_REG: 0X00000000
[ 8688.305773] iwlwifi 0000:02:00.0: CSR_GIO_REG: 0X00080042
[ 8688.305800] iwlwifi 0000:02:00.0: CSR_GP_UCODE_REG: 0X00004467
[ 8688.305826] iwlwifi 0000:02:00.0: CSR_GP_DRIVER_REG: 0X00000000
[ 8688.305852] iwlwifi 0000:02:00.0: CSR_UCODE_DRV_GP1: 0X00000001
[ 8688.305879] iwlwifi 0000:02:00.0: CSR_UCODE_DRV_GP2: 0X00000000
[ 8688.305906] iwlwifi 0000:02:00.0: CSR_LED_REG: 0X00000058
[ 8688.305932] iwlwifi 0000:02:00.0: CSR_DRAM_INT_TBL_REG: 0X88031f98
[ 8688.305959] iwlwifi 0000:02:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200
[ 8688.305985] iwlwifi 0000:02:00.0: CSR_ANA_PLL_CFG: 0X00880300
[ 8688.306012] iwlwifi 0000:02:00.0: CSR_HW_REV_WA_REG: 0X0001001a
[ 8688.306039] iwlwifi 0000:02:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0000
[ 8688.306043] iwlwifi 0000:02:00.0: FH register values:
[ 8688.306086] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG:
0X02fbfd00
[ 8688.306124] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG:
0X002cd1e0
[ 8688.306161] iwlwifi 0000:02:00.0: FH_RSCSR_CHNL0_WPTR:
0X000000c8
[ 8688.306197] iwlwifi 0000:02:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG:
0X80819104
[ 8688.306234] iwlwifi 0000:02:00.0: FH_MEM_RSSR_SHARED_CTRL_REG:
0X000000fc
[ 8688.306272] iwlwifi 0000:02:00.0: FH_MEM_RSSR_RX_STATUS_REG:
0X07030000
[ 8688.306307] iwlwifi 0000:02:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV:
0X00000000
[ 8688.306349] iwlwifi 0000:02:00.0: FH_TSSR_TX_STATUS_REG:
0X077f0001
[ 8688.306384] iwlwifi 0000:02:00.0: FH_TSSR_TX_ERROR_REG:
0X00000000
[ 8688.306467] iwlwifi 0000:02:00.0: Start IWL Event Log Dump: nothing in log
[ 8688.306840] iwlwifi 0000:02:00.0: Command REPLY_SCAN_CMD failed: FW Error
[ 8688.309152] iwlwifi 0000:02:00.0: Failing on timeout while stopping DMA
channel 7 [0x077f0001]
[ 8688.312109] ieee80211 phy1: Hardware restart was requested
[ 8688.312189] iwlwifi 0000:02:00.0: L1 Enabled; Disabling L0S
On Tue, 29 Nov 2011 09:18:40 -0500 "Ken D'Ambrosio" <[email protected]> wrote
> I hadn't sent this, because I'd thought I was only getting WARNINGs on my
> Virtualbox-tainted kernel, but this happened untainted, so here you go. Hope
> it helps!
>
> -Ken
>
>
> [ 198.113130] wlan0: deauthenticating from 00:27:0d:98:d1:f1 by local choice
> (reason=3)
> [ 198.113277] ------------[ cut here ]------------
> [ 198.113313] WARNING: at net/wireless/mlme.c:309
> __cfg80211_auth_remove+0x56/0xa0 [cfg80211]()
> [ 198.113317] Hardware name: EC14 Series
> [ 198.113320] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat
> binfmt_misc ppdev snd_hda_codec_hdmi snd_hda_codec_realtek joydev
> snd_hda_intel snd_hda_codec arc4 snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm
> usb_storage snd_seq_dummy uvcvideo videodev snd_seq_oss fbcon tileblit
> snd_seq_midi i915 snd_rawmidi iwlwifi font bitblit snd_seq_midi_event
> softcursor snd_seq psmouse snd_timer snd_seq_device serio_raw mac80211
> drm_kms_helper acer_wmi drm sparse_keymap atl1c i2c_algo_bit cfg80211
> intel_agp snd intel_gtt agpgart soundcore video snd_page_alloc lp parport
> [ 198.113397] Pid: 44, comm: kworker/u:3 Not tainted 3.1.0+ #1
> [ 198.113401] Call Trace:
> [ 198.113412] [<c068e057>] ? printk+0x1d/0x1f
> [ 198.113423] [<c01562b2>] warn_slowpath_common+0x72/0xa0
> [ 198.113439] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113454] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113461] [<c0156302>] warn_slowpath_null+0x22/0x30
> [ 198.113480] [<f8cbc1e6>] __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113496] [<f8cbc2ae>] cfg80211_send_auth_timeout+0x5e/0xc0 [cfg80211]
> [ 198.113518] [<f868f796>] ieee80211_probe_auth_done+0xe6/0xf0 [mac80211]
> [ 198.113525] [<c014f614>] ? wake_up_process+0x14/0x20
> [ 198.113532] [<c06976ec>] ? __mutex_unlock_slowpath+0x3c/0x50
> [ 198.113552] [<f86929bb>] ieee80211_work_work+0x47b/0x12d0 [mac80211]
> [ 198.113559] [<c0134c58>] ? default_spin_lock_flags+0x8/0x10
> [ 198.113566] [<c0698701>] ? _raw_spin_trylock_bh+0x1/0x30
> [ 198.113575] [<c017043e>] process_one_work+0xfe/0x3a0
> [ 198.113580] [<c014f614>] ? wake_up_process+0x14/0x20
> [ 198.113586] [<c016dfe5>] ? start_worker+0x25/0x30
> [ 198.113605] [<f8692540>] ? free_work+0x20/0x20 [mac80211]
> [ 198.113612] [<c0170f74>] worker_thread+0x124/0x2d0
> [ 198.113618] [<c0170e50>] ? manage_workers.isra.28+0x1e0/0x1e0
> [ 198.113624] [<c0174ced>] kthread+0x6d/0x80
> [ 198.113630] [<c0174c80>] ? flush_kthread_worker+0x80/0x80
> [ 198.113637] [<c069fb06>] kernel_thread_helper+0x6/0x10
> [ 198.113642] ---[ end trace 04bdbdc199f6d75f ]---
>
>
>
> Hi. For reasons pertaining to btrfs, I'm running 3.1+ kernels, and the wifi
> on my system now flakes out sporadically, but reliably. It can sometimes run
> for a couple days, but other days (like, say, yesterday) it'll fail upwards
> of 30 times. Simply attempting to re-acquire a connection via Network Manager
> fails 100%. I need to rmmod and modprobe the iwlwifi module, and then am
> able to immediately connect, 100% of the time -- albeit, briefly. Rebooting
> under these circumstances seems to have as much affect as reloading the
> module. (I wonder if there's something that changes on the WAP side that
> triggers this? That would explain the occasional doses of extended uptime,
> followed by days of misery, regardless of reboots and module playing.)
>
> While the behavior, sadly, *is* sporadic, when
>
> - it's not a problem on older (distribution-supplied) kernels, and
> - reloading -- and only reloading -- the module fixes it, however briefly,
>
> it seems to me it's probably a problem with the module.
>
>
> Here's some additional information:
>
> * Happens on multiple WAPs (home, hotel, work, etc.)
>
> * 02:00.0 Network controller: Intel Corporation WiFi Link 1000 Series
>
> * The system *thinks* everything is fine -- NetworkManager happily shows all
> the WAPs, etc. -- but I'm unable to re-acquire them until I reload the
> module.
>
> * kernel 3.1.0+, untainted (Chris Mason's btrfs git pull from three weeks
> ago; also experienced with slightly older, post 3.x kernels)
>
> * Seems to fail most quickly under load (e.g., streaming); can push an hour
> if doing relatively little
>
> * I'm unsure which kernel rev. was the tipping point, but Ubuntu 10.04
> generally "just worked," and is what I'm booted to now off of USB -- 2.6.32.
>
> I'd give you dmesg messages, but I'm -- catch-22 -- Ubuntu 10.04 won't mount
> my btrfs partition, but runs WiFi flawlessly. If you need those messages,
> just let me know, and I'll pull them off.
>
> If there's anything else I can help out with, please don't hesitate to let me
> know.
>
> Thanks!
>
> -Ken
no sure, there are some mac80211 race condition problem found and being
address now. maybe you can try the patch from Nikolay and see if help.
Wey
On Tue, 2011-11-29 at 06:18 -0800, Ken D'Ambrosio wrote:
> I hadn't sent this, because I'd thought I was only getting WARNINGs on my
> Virtualbox-tainted kernel, but this happened untainted, so here you go. Hope
> it helps!
>
> -Ken
>
>
> [ 198.113130] wlan0: deauthenticating from 00:27:0d:98:d1:f1 by local choice
> (reason=3)
> [ 198.113277] ------------[ cut here ]------------
> [ 198.113313] WARNING: at net/wireless/mlme.c:309
> __cfg80211_auth_remove+0x56/0xa0 [cfg80211]()
> [ 198.113317] Hardware name: EC14 Series
> [ 198.113320] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat binfmt_misc
> ppdev snd_hda_codec_hdmi snd_hda_codec_realtek joydev snd_hda_intel
> snd_hda_codec arc4 snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm usb_storage
> snd_seq_dummy uvcvideo videodev snd_seq_oss fbcon tileblit snd_seq_midi i915
> snd_rawmidi iwlwifi font bitblit snd_seq_midi_event softcursor snd_seq psmouse
> snd_timer snd_seq_device serio_raw mac80211 drm_kms_helper acer_wmi drm
> sparse_keymap atl1c i2c_algo_bit cfg80211 intel_agp snd intel_gtt agpgart
> soundcore video snd_page_alloc lp parport
> [ 198.113397] Pid: 44, comm: kworker/u:3 Not tainted 3.1.0+ #1
> [ 198.113401] Call Trace:
> [ 198.113412] [<c068e057>] ? printk+0x1d/0x1f
> [ 198.113423] [<c01562b2>] warn_slowpath_common+0x72/0xa0
> [ 198.113439] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113454] [<f8cbc1e6>] ? __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113461] [<c0156302>] warn_slowpath_null+0x22/0x30
> [ 198.113480] [<f8cbc1e6>] __cfg80211_auth_remove+0x56/0xa0 [cfg80211]
> [ 198.113496] [<f8cbc2ae>] cfg80211_send_auth_timeout+0x5e/0xc0 [cfg80211]
> [ 198.113518] [<f868f796>] ieee80211_probe_auth_done+0xe6/0xf0 [mac80211]
> [ 198.113525] [<c014f614>] ? wake_up_process+0x14/0x20
> [ 198.113532] [<c06976ec>] ? __mutex_unlock_slowpath+0x3c/0x50
> [ 198.113552] [<f86929bb>] ieee80211_work_work+0x47b/0x12d0 [mac80211]
> [ 198.113559] [<c0134c58>] ? default_spin_lock_flags+0x8/0x10
> [ 198.113566] [<c0698701>] ? _raw_spin_trylock_bh+0x1/0x30
> [ 198.113575] [<c017043e>] process_one_work+0xfe/0x3a0
> [ 198.113580] [<c014f614>] ? wake_up_process+0x14/0x20
> [ 198.113586] [<c016dfe5>] ? start_worker+0x25/0x30
> [ 198.113605] [<f8692540>] ? free_work+0x20/0x20 [mac80211]
> [ 198.113612] [<c0170f74>] worker_thread+0x124/0x2d0
> [ 198.113618] [<c0170e50>] ? manage_workers.isra.28+0x1e0/0x1e0
> [ 198.113624] [<c0174ced>] kthread+0x6d/0x80
> [ 198.113630] [<c0174c80>] ? flush_kthread_worker+0x80/0x80
> [ 198.113637] [<c069fb06>] kernel_thread_helper+0x6/0x10
> [ 198.113642] ---[ end trace 04bdbdc199f6d75f ]---
>
>
>
> Hi. For reasons pertaining to btrfs, I'm running 3.1+ kernels, and the wifi
> on my system now flakes out sporadically, but reliably. It can sometimes run
> for a couple days, but other days (like, say, yesterday) it'll fail upwards of
> 30 times. Simply attempting to re-acquire a connection via Network Manager
> fails 100%. I need to rmmod and modprobe the iwlwifi module, and then am able
> to immediately connect, 100% of the time -- albeit, briefly. Rebooting under
> these circumstances seems to have as much affect as reloading the module. (I
> wonder if there's something that changes on the WAP side that triggers this?
> That would explain the occasional doses of extended uptime, followed by days of
> misery, regardless of reboots and module playing.)
>
> While the behavior, sadly, *is* sporadic, when
>
> - it's not a problem on older (distribution-supplied) kernels, and
> - reloading -- and only reloading -- the module fixes it, however briefly,
>
> it seems to me it's probably a problem with the module.
>
>
> Here's some additional information:
>
> * Happens on multiple WAPs (home, hotel, work, etc.)
>
> * 02:00.0 Network controller: Intel Corporation WiFi Link 1000 Series
>
> * The system *thinks* everything is fine -- NetworkManager happily shows all
> the WAPs, etc. -- but I'm unable to re-acquire them until I reload the module.
>
> * kernel 3.1.0+, untainted (Chris Mason's btrfs git pull from three weeks ago;
> also experienced with slightly older, post 3.x kernels)
>
> * Seems to fail most quickly under load (e.g., streaming); can push an hour if
> doing relatively little
>
> * I'm unsure which kernel rev. was the tipping point, but Ubuntu 10.04
> generally "just worked," and is what I'm booted to now off of USB -- 2.6.32.
>
> I'd give you dmesg messages, but I'm -- catch-22 -- Ubuntu 10.04 won't mount my
> btrfs partition, but runs WiFi flawlessly. If you need those messages, just
> let me know, and I'll pull them off.
>
> If there's anything else I can help out with, please don't hesitate to let me
> know.
>
> Thanks!
>
> -Ken
>
>
>
>
>
> --
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