wifi stops working intermittently

[Cory Coager]

My wifi stops working intermittently but it seems to happen as often as every day. When it happens, I notice some spam in dmesg. I notice that I am still connected to the wireless access point but no data seems to pass through. I cannot ping or resolve DNS. I make sure power management is off on the wifi device.

This is for Ubuntu 12.04, 3.2.0-36-generic kernel, all packages up-to-date as of 1/22/2013. This hardware is a Dell XPS L702X with an Intel Corporation Centrino Advanced-N 6230 wifi device.

[Cory Coager (ccoager)]

[ 1035.053304] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000.
[ 1035.053307] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1
[ 1035.053406] iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
[ 1035.053408] iwlwifi 0000:03:00.0: Status: 0x0004B2E4, count: 6
[ 1035.053409] iwlwifi 0000:03:00.0: 0x0000198A | ADVANCED_SYSASSERT
[ 1035.053410] iwlwifi 0000:03:00.0: 0x00015920 | uPc
[ 1035.053411] iwlwifi 0000:03:00.0: 0x00015910 | branchlink1
[ 1035.053412] iwlwifi 0000:03:00.0: 0x00015910 | branchlink2
[ 1035.053414] iwlwifi 0000:03:00.0: 0x0000DBEA | interruptlink1
[ 1035.053415] iwlwifi 0000:03:00.0: 0x00000000 | interruptlink2
[ 1035.053416] iwlwifi 0000:03:00.0: 0x00000280 | data1
[ 1035.053417] iwlwifi 0000:03:00.0: 0x00000004 | data2
[ 1035.053418] iwlwifi 0000:03:00.0: 0x000001DC | line
[ 1035.053419] iwlwifi 0000:03:00.0: 0xA880D5A7 | beacon time
[ 1035.053420] iwlwifi 0000:03:00.0: 0x6D3F9A59 | tsf low
[ 1035.053421] iwlwifi 0000:03:00.0: 0x00000357 | tsf hi
[ 1035.053422] iwlwifi 0000:03:00.0: 0x00000000 | time gp1
[ 1035.053423] iwlwifi 0000:03:00.0: 0x3CD29FD7 | time gp2
[ 1035.053424] iwlwifi 0000:03:00.0: 0x00000000 | time gp3
[ 1035.053425] iwlwifi 0000:03:00.0: 0x754312A8 | uCode version
[ 1035.053426] iwlwifi 0000:03:00.0: 0x000000B0 | hw version
[ 1035.053427] iwlwifi 0000:03:00.0: 0x00480303 | board version
[ 1035.053428] iwlwifi 0000:03:00.0: 0x0000001C | hcmd
[ 1035.053429] iwlwifi 0000:03:00.0: CSR values:
[ 1035.053430] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
[ 1035.053458] iwlwifi 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00480303
[ 1035.053483] iwlwifi 0000:03:00.0: CSR_INT_COALESCING: 0X0000ff40
[ 1035.053508] iwlwifi 0000:03:00.0: CSR_INT: 0X00000000
[ 1035.053534] iwlwifi 0000:03:00.0: CSR_INT_MASK: 0X00000000
[ 1035.053560] iwlwifi 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000
[ 1035.053585] iwlwifi 0000:03:00.0: CSR_GPIO_IN: 0X0000003c
[ 1035.053611] iwlwifi 0000:03:00.0: CSR_RESET: 0X00000000
[ 1035.053644] iwlwifi 0000:03:00.0: CSR_GP_CNTRL: 0X080403c5
[ 1035.053671] iwlwifi 0000:03:00.0: CSR_HW_REV: 0X000000b0
[ 1035.053697] iwlwifi 0000:03:00.0: CSR_EEPROM_REG: 0X509c0ffd
[ 1035.053723] iwlwifi 0000:03:00.0: CSR_EEPROM_GP: 0X90000801
[ 1035.053749] iwlwifi 0000:03:00.0: CSR_OTP_GP_REG: 0X00030001
[ 1035.053774] iwlwifi 0000:03:00.0: CSR_GIO_REG: 0X00080042
[ 1035.053799] iwlwifi 0000:03:00.0: CSR_GP_UCODE_REG: 0X0000872c
[ 1035.053825] iwlwifi 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000
[ 1035.053851] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000
[ 1035.053861] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000
[ 1035.053886] iwlwifi 0000:03:00.0: CSR_LED_REG: 0X00000058
[ 1035.053912] iwlwifi 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X88412e54
[ 1035.053937] iwlwifi 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200
[ 1035.053963] iwlwifi 0000:03:00.0: CSR_ANA_PLL_CFG: 0X000000...

[Cory Coager (ccoager)]

[ 7156.029730] cfg80211: All devices are disconnected, going to restore regulatory settings
[ 7156.029746] cfg80211: Restoring regulatory settings
[ 7156.029757] cfg80211: Calling CRDA to update world regulatory domain
[ 7156.038194] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[ 7156.038204] cfg80211: World regulatory domain updated:
[ 7156.038208] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 7156.038215] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7156.038221] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7156.038226] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 7156.038232] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7156.038237] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 7159.226055] wlan0: authenticate with 30:85:a9:e7:19:48 (try 1)
[ 7159.228882] wlan0: authenticated
[ 7159.230115] wlan0: associate with 30:85:a9:e7:19:48 (try 1)
[ 7159.233944] wlan0: RX ReassocResp from 30:85:a9:e7:19:48 (capab=0x411 status=0 aid=1)
[ 7159.233954] wlan0: associated
[13506.423300] cfg80211: All devices are disconnected, going to restore regulatory settings
[13506.423313] cfg80211: Restoring regulatory settings
[13506.423321] cfg80211: Calling CRDA to update world regulatory domain
[13506.431642] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
[13506.431652] cfg80211: World regulatory domain updated:
[13506.431656] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[13506.431663] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13506.431669] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[13506.431674] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[13506.431679] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13506.431684] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[13509.584690] wlan0: authenticate with 30:85:a9:e7:19:48 (try 1)
[13509.781987] wlan0: authenticate with 30:85:a9:e7:19:48 (try 2)
[13509.784611] wlan0: authenticated
[13509.785175] wlan0: associate with 30:85:a9:e7:19:48 (try 1)
[13509.789009] wlan0: RX ReassocResp from 30:85:a9:e7:19:48 (capab=0x411 status=0 aid=1)
[13509.789019] wlan0: associated
[13511.101996] iwlwifi 0000:03:00.0: Tx aggregation enabled on ra = 30:85:a9:e7:19:48 tid = 0

[Cory Coager (ccoager)]

lspci:

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
 Subsystem: Dell Device 0570
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- INTx-
 Latency: 0
 Capabilities: <access denied>

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 64 bytes
 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
 I/O behind bridge: 00004000-00004fff
 Memory behind bridge: d4000000-d60fffff
 Prefetchable memory behind bridge: 00000000c0000000-00000000d3ffffff
 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
 BridgeCtl: Parity- SERR- NoISA- VGA+ MAbort- >Reset- FastB2B-
  PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
 Capabilities: <access denied>
 Kernel driver in use: pcieport
 Kernel modules: shpchp

00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
 Subsystem: Dell Device 0570
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 52
 Region 0: Memory at d8005000 (64-bit, non-prefetchable) [size=16]
 Capabilities: <access denied>
 Kernel driver in use: mei
 Kernel modules: mei

00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) (prog-if 20 [EHCI])
 Subsystem: Dell Device 0570
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
 Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0
 Interrupt: pin A routed to IRQ 16
 Region 0: Memory at d800a000 (32-bit, non-prefetchable) [size=1K]
 Capabilities: <access denied>
 Kernel driver in use: ehci_hcd

00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
 Subsystem: Dell Device 0570
 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
 Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
 Latency: 0, Cache Line Size: 64 bytes
 Interrupt: pin A routed to IRQ 54
 Region 0: Memory at d8000000 (64-bit, non-prefetchable) [size=16K]
 Capabilities: <access denied>
 Kernel driver in use: snd_hda_intel
 Kernel modules: snd-hda-intel

00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5) (prog-if 00 [Normal decode])
 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SER...

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1102999/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Cory Coager (ccoager)]

Could someone please request whatever information is needed to work on this bug? I am more than happy to provide whatever is needed. This daily issue is killing my Ubuntu experience.

[Cory Coager (ccoager)]

Another issue today:

[ 677.417545] iwlwifi 0000:03:00.0: Microcode SW error detected. Restarting 0x82000000.
[ 677.417558] iwlwifi 0000:03:00.0: Loaded firmware version: 18.168.6.1
[ 677.417666] iwlwifi 0000:03:00.0: Start IWL Error Log Dump:
[ 677.417672] iwlwifi 0000:03:00.0: Status: 0x0004B2E4, count: 6
[ 677.417679] iwlwifi 0000:03:00.0: 0x0000198A | ADVANCED_SYSASSERT
[ 677.417684] iwlwifi 0000:03:00.0: 0x00015920 | uPc
[ 677.417689] iwlwifi 0000:03:00.0: 0x00015910 | branchlink1
[ 677.417693] iwlwifi 0000:03:00.0: 0x00015910 | branchlink2
[ 677.417697] iwlwifi 0000:03:00.0: 0x0000DBEA | interruptlink1
[ 677.417702] iwlwifi 0000:03:00.0: 0x00000000 | interruptlink2
[ 677.417707] iwlwifi 0000:03:00.0: 0x000001EB | data1
[ 677.417711] iwlwifi 0000:03:00.0: 0x00000005 | data2
[ 677.417715] iwlwifi 0000:03:00.0: 0x000001DC | line
[ 677.417719] iwlwifi 0000:03:00.0: 0x3BC06E09 | beacon time
[ 677.417724] iwlwifi 0000:03:00.0: 0x185A21F7 | tsf low
[ 677.417728] iwlwifi 0000:03:00.0: 0x000003E5 | tsf hi
[ 677.417732] iwlwifi 0000:03:00.0: 0x00000000 | time gp1
[ 677.417737] iwlwifi 0000:03:00.0: 0x276B4C22 | time gp2
[ 677.417741] iwlwifi 0000:03:00.0: 0x00000000 | time gp3
[ 677.417745] iwlwifi 0000:03:00.0: 0x754312A8 | uCode version
[ 677.417750] iwlwifi 0000:03:00.0: 0x000000B0 | hw version
[ 677.417755] iwlwifi 0000:03:00.0: 0x00480303 | board version
[ 677.417759] iwlwifi 0000:03:00.0: 0x0000001C | hcmd
[ 677.417763] iwlwifi 0000:03:00.0: CSR values:
[ 677.417767] iwlwifi 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
[ 677.417801] iwlwifi 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00480303
[ 677.417832] iwlwifi 0000:03:00.0: CSR_INT_COALESCING: 0X00000040
[ 677.417861] iwlwifi 0000:03:00.0: CSR_INT: 0X00000000
[ 677.417889] iwlwifi 0000:03:00.0: CSR_INT_MASK: 0X00000000
[ 677.417920] iwlwifi 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000
[ 677.417948] iwlwifi 0000:03:00.0: CSR_GPIO_IN: 0X0000003c
[ 677.417978] iwlwifi 0000:03:00.0: CSR_RESET: 0X00000000
[ 677.418009] iwlwifi 0000:03:00.0: CSR_GP_CNTRL: 0X080403c5
[ 677.418038] iwlwifi 0000:03:00.0: CSR_HW_REV: 0X000000b0
[ 677.418070] iwlwifi 0000:03:00.0: CSR_EEPROM_REG: 0X509c0ffd
[ 677.418098] iwlwifi 0000:03:00.0: CSR_EEPROM_GP: 0X90000801
[ 677.418127] iwlwifi 0000:03:00.0: CSR_OTP_GP_REG: 0X00030001
[ 677.418159] iwlwifi 0000:03:00.0: CSR_GIO_REG: 0X00080042
[ 677.418187] iwlwifi 0000:03:00.0: CSR_GP_UCODE_REG: 0X000058e1
[ 677.418216] iwlwifi 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000
[ 677.418247] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000
[ 677.418275] iwlwifi 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000
[ 677.418305] iwlwifi 0000:03:00.0: CSR_LED_REG: 0X00000058
[ 677.418333] iwlwifi 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X88417a28
[ 677.418361] iwlwifi 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200
[ 677.418392] iwlwifi 0000:03:00.0: C...

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Cory Coager (ccoager)]

This may be a duplicate of bug #1099487.

[penalvch (penalvch)]

Cory Coager, it wouldn't be considered a duplicate at this time as the requested apport-collect in Trusty hasn't occurred. Hence, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Please feel free to mark Confirmed when this has been completed.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]