Ubuntu
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Latest kernel 2.6.38-11.48 crashes the iwlagn (wifi) driver

Bug #837819 reported by Juliano Ravasi on 2011-08-31

This bug affects 3 people

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Expired	Undecided	Unassigned

Bug Description

The latest kernel 2.6.38-11.48 pushed a few days ago is causing the iwlagn driver to crash with a "microcode software error" on this wireless network interface (from a Dell XPS L502X):

03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 (rev 34)
        Subsystem: Intel Corporation Centrino Wireless-N 1030 BGN
        Flags: bus master, fast devsel, latency 0, IRQ 49
        Memory at f1b00000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [c8] Power Management version 3
        Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number bc-77-37-ff-ff-37-05-96
        Kernel driver in use: iwlagn
        Kernel modules: iwlagn

The errors are random, but more frequent during heavy usage. This is dumped to the system log:

iwlagn 0000:03:00.0: Microcode SW error detected. Restarting 0x2000000.
iwlagn 0000:03:00.0: Loaded firmware version: 17.168.5.2 build 35905
iwlagn 0000:03:00.0: Start IWL Error Log Dump:
iwlagn 0000:03:00.0: Status: 0x0002B2E4, count: 6
iwlagn 0000:03:00.0: Desc Time data1 data2 line
iwlagn 0000:03:00.0: ADVANCED_SYSASSERT (0x1BD8) 0024444172 0x00000258 0x000000C8 199
iwlagn 0000:03:00.0: pc blink1 blink2 ilink1 ilink2 hcmd
iwlagn 0000:03:00.0: 0x05FBC 0x05F1E 0x05F1E 0x0DC1A 0x00000 0x92D0091
iwlagn 0000:03:00.0: CSR values:
iwlagn 0000:03:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
iwlagn 0000:03:00.0: CSR_HW_IF_CONFIG_REG: 0X00c80303
iwlagn 0000:03:00.0: CSR_INT_COALESCING: 0X0000ff40
iwlagn 0000:03:00.0: CSR_INT: 0X00000000
iwlagn 0000:03:00.0: CSR_INT_MASK: 0X00000000
iwlagn 0000:03:00.0: CSR_FH_INT_STATUS: 0X00000000
iwlagn 0000:03:00.0: CSR_GPIO_IN: 0X0000003c
iwlagn 0000:03:00.0: CSR_RESET: 0X00000000
iwlagn 0000:03:00.0: CSR_GP_CNTRL: 0X080403c5
iwlagn 0000:03:00.0: CSR_HW_REV: 0X000000b0
iwlagn 0000:03:00.0: CSR_EEPROM_REG: 0X27010ffd
iwlagn 0000:03:00.0: CSR_EEPROM_GP: 0X90000801
iwlagn 0000:03:00.0: CSR_OTP_GP_REG: 0X00030001
iwlagn 0000:03:00.0: CSR_GIO_REG: 0X00080042
iwlagn 0000:03:00.0: CSR_GP_UCODE_REG: 0X0000521e
iwlagn 0000:03:00.0: CSR_GP_DRIVER_REG: 0X00000000
iwlagn 0000:03:00.0: CSR_UCODE_DRV_GP1: 0X00000000
iwlagn 0000:03:00.0: CSR_UCODE_DRV_GP2: 0X00000000
iwlagn 0000:03:00.0: CSR_LED_REG: 0X00000058
iwlagn 0000:03:00.0: CSR_DRAM_INT_TBL_REG: 0X8811bea2
iwlagn 0000:03:00.0: CSR_GIO_CHICKEN_BITS: 0X27800200
iwlagn 0000:03:00.0: CSR_ANA_PLL_CFG: 0X00000000
iwlagn 0000:03:00.0: CSR_HW_REV_WA_REG: 0X0001001a
iwlagn 0000:03:00.0: CSR_DBG_HPET_MEM_REG: 0Xffff0000
iwlagn 0000:03:00.0: FH register values:
iwlagn 0000:03:00.0: FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X0a958200
iwlagn 0000:03:00.0: FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X00a97a60
iwlagn 0000:03:00.0: FH_RSCSR_CHNL0_WPTR: 0X000000f8
iwlagn 0000:03:00.0: FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80819104
iwlagn 0000:03:00.0: FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
iwlagn 0000:03:00.0: FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
iwlagn 0000:03:00.0: FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
iwlagn 0000:03:00.0: FH_TSSR_TX_STATUS_REG: 0X07ff0001
iwlagn 0000:03:00.0: FH_TSSR_TX_ERROR_REG: 0X00000000
iwlagn 0000:03:00.0: Start IWL Event Log Dump: display last 20 entries
iwlagn 0000:03:00.0: EVT_LOGT:0025527212:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025527292:0x000000fa:0106
iwlagn 0000:03:00.0: EVT_LOGT:0025527470:0x00002000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025527471:0x00004000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025527655:0x00001000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025528337:0x00000080:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025528338:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025530451:0x000000fa:0106
iwlagn 0000:03:00.0: EVT_LOGT:0025530542:0x00000080:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025530543:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025530549:0x000000fa:0106
iwlagn 0000:03:00.0: EVT_LOGT:0025530803:0x00000080:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025530804:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025531835:0x000000fa:0106
iwlagn 0000:03:00.0: EVT_LOGT:0025531927:0x00000080:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025531928:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025532245:0x000000fa:0106
iwlagn 0000:03:00.0: EVT_LOGT:0025532335:0x00000080:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025532336:0x00040000:1243
iwlagn 0000:03:00.0: EVT_LOGT:0025534328:0x00000000:0125
iwlagn 0000:03:00.0: Attempting to modify non-existing station 2

This error repeats over and over again, until I disconnect. The WiFi led turns off and then on again every time the driver gives this error. Going back to version 2.6.38-10.46 resolves the problem, so this is a regression in the current version.

The changelog of this version mentions:

iwlagn: fix iwl_is_any_associated

Perhaps this fix is the culprit, and it introduced this new problem.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-11-generic 2.6.38-11.48
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC665 Analog [ALC665 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: juliano 2135 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf1c00000 irq 50'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:10ec0665,102804b6,00100003 HDA:80862805,80860101,00100000'
   Controls : 27
   Simple ctrls : 13
Date: Wed Aug 31 00:24:08 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=2dd8520d-df2b-4937-8655-c779de8f152a
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Dell Inc. Dell System XPS L502X
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-11-generic root=UUID=bd6ddeeb-587d-403c-b829-c6f49fbd0796 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-11-generic N/A
linux-backports-modules-2.6.38-11-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0YR8NN
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.:bvrA04:bd03/25/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0YR8NN:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.

Tags:

Revision history for this message

Juliano Ravasi (jravasi) wrote on 2011-08-31:

AcpiTables.txt Edit (244.0 KiB, text/plain; charset="utf-8")
AlsaDevices.txt Edit (585 bytes, text/plain; charset="utf-8")
AplayDevices.txt Edit (379 bytes, text/plain; charset="utf-8")
BootDmesg.txt Edit (58.1 KiB, text/plain; charset="utf-8")
Card0.Amixer.values.txt Edit (2.7 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.0.txt Edit (12.8 KiB, text/plain; charset="utf-8")
Card0.Codecs.codec.3.txt Edit (3.0 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (19.5 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (1.9 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (460 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (11.8 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (503 bytes, text/plain; charset="utf-8")
PciMultimedia.txt Edit (602 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (3.4 KiB, text/plain; charset="utf-8")
ProcCpuinfo_.txt Edit (3.4 KiB, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (2.2 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (5.3 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (240 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (124.8 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (285.2 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (122.5 KiB, text/plain; charset="utf-8")

Brad Figg (brad-figg) on 2011-08-31

Changed in linux (Ubuntu):
status:	New → Confirmed

Revision history for this message

Marius B. Kotsbak (mariusko) wrote on 2011-08-31:

Could you do a bisection?: https://wiki.ubuntu.com/Kernel/KernelBisection

Revision history for this message

Juliano Ravasi (jravasi) wrote on 2011-08-31:

This is the commit reported by bisect:

2b4208383d114d202d38eb3b04ff7b844de8eefa is the first bad commit
commit 2b4208383d114d202d38eb3b04ff7b844de8eefa
Author: Johannes Berg <email address hidden>
Date: Fri May 6 11:11:20 2011 -0700

iwlagn: fix iwl_is_any_associated

BugLink: http://bugs.launchpad.net/bugs/793702

commit 054ec924944912413e4ee927b8cf02f476d08783 upstream.

    The function iwl_is_any_associated() was intended
    to check both contexts, but due to an oversight
    it only checks the BSS context. This leads to a
    problem with scanning since the passive dwell
    time isn't restricted appropriately and a scan
    that includes passive channels will never finish
    if only the PAN context is associated since the
    default dwell time of 120ms won't fit into the
    normal 100 TU DTIM interval.

    Fix the function by using for_each_context() and
    also reorganise the other functions a bit to take
    advantage of each other making the code easier to
    read.

    Signed-off-by: Johannes Berg <email address hidden>
    Signed-off-by: Wey-Yi Guy <email address hidden>
    Signed-off-by: John W. Linville <email address hidden>
    Signed-off-by: Greg Kroah-Hartman <email address hidden>
    Signed-off-by: Tim Gardner <email address hidden>

:040000 040000 0db112ac8e49c4741150666f49236a5386ecbeb3 7d2640cda3ac0b9b69fae1bdf35ee62e3be310cc M drivers

Revision history for this message

Bert JW Regeer (xistence) wrote on 2011-08-31:

Download full text (5.5 KiB)

I am seeing the same error messages in my log as the OP:

[ 3336.284786] iwlagn 0000:01:00.0: [ 3336.284810] iwlagn 0000:01:00.0: [ 3336.284904] iwlagn 0000:01:00.0: [ 3336.284915] iwlagn 0000:01:00.0: [ 3336.285158] iwlagn 0000:01:00.0: Desc [ 3336.285170] iwlagn 0000:01:00.0: [ 3336.285182] iwlagn 0000:01:00.0: pc [ 3336.285195] iwlagn 0000:01:00.0: [ 3336.285206] iwlagn 0000:01:00.0: [ 3336.285216] iwlagn 0000:01:00.0: [ 3336.285258] iwlagn 0000:01:00.0: [ 3336.285296] iwlagn 0000:01:00.0: [ 3336.285334] iwlagn 0000:01:00.0: [ 3336.285371] iwlagn 0000:01:00.0: [ 3336.285407] iwlagn 0000:01:00.0: [ 3336.285442] iwlagn 0000:01:00.0: [ 3336.285478] iwlagn 0000:01:00.0: [ 3336.285515] iwlagn 0000:01:00.0: [ 3336.285552] iwlagn 0000:01:00.0: [ 3336.285588] iwlagn 0000:01:00.0: [ 3336.285625] iwlagn 0000:01:00.0: [ 3336.285661] iwlagn 0000:01:00.0: [ 3336.285696] iwlagn 0000:01:00.0: [ 3336.285732] iwlagn 0000:01:00.0: [ 3336.285769] iwlagn 0000:01:00.0: [ 3336.285803] iwlagn 0000:01:00.0: [ 3336.285838] iwlagn 0000:01:00.0: [ 3336.285875] iwlagn 0000:01:00.0: [ 3336.285911] iwlagn 0000:01:00.0: [ 3336.285948] iwlagn 0000:01:00.0: [ 3336.285984] iwlagn 0000:01:00.0: [ 3336.286023] iwlagn 0000:01:00.0: [ 3336.286058] iwlagn 0000:01:00.0: [ 3336.286067] iwlagn 0000:01:00.0: [ 3336.286145] iwlagn 0000:01:00.0: [ 3336.286225] iwlagn 0000:01:00.0: [ 3336.286316] iwlagn 0000:01:00.0: [ 3336.286406] iwlagn 0000:01:00.0: [ 3336.286497] iwlagn 0000:01:00.0: [ 3336.286589] iwlagn 0000:01:00.0: Microcode SW error detected. Restarting 0x2000000.
Loaded firmware version: 17.168.5.2 build 35905
Start IWL Error Log Dump:
Status: 0x0002B2E4, count: 6
Time data1 data2 line
ADVANCED_SYSASSERT (0x1BD8) 0299830228 0x00000258 0x000000C8 199
blink1 blink2 ilink1 ilink2 hcmd
0x05FBC 0x05F1E 0x05F1E 0x0DC1A 0x00000 0x9A90091
CSR values:
(2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
CSR_HW_IF_CONFIG_REG: 0X00c80303
CSR_INT_COALESCING: 0X0000ff40
CSR_INT: 0X00000000
CSR_INT_MASK: 0X00000000
CSR_FH_INT_STATUS: 0X00000000
CSR_GPIO_IN: 0X0000003c
CSR_RESET: 0X00000000
CSR_GP_CNTRL: 0X080403c5
CSR_HW_REV: 0X000000b0
CSR_EEPROM_REG: 0X88160ffd
CSR_EEPROM_GP: 0X90000801
CSR_OTP_GP_REG: 0X00030001
CSR_GIO_REG: 0X00080042
CSR_GP_UCODE_REG: 0X000063c1
CSR_GP_DRIVER_REG: 0X00000000
CSR_UCODE_DRV_GP1: 0X00000000
CSR_UCODE_DRV_GP2: 0X00000000
CSR_LED_REG: 0X00000058
CSR_DRAM_INT_TBL_REG: 0X881b20dc
CSR_GIO_CHICKEN_BITS: 0X27800200
CSR_ANA_PLL_CFG: 0X00000000
CSR_HW_REV_WA_REG: 0X0001001a
CSR_DBG_HPET_MEM_REG: 0Xffff0000
FH register values:
FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X1a241f00
FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X01b36ba0
FH_RSCSR_CHNL0_WPTR: 0X00000038
FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80819104
FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
FH_MEM_RSSR_RX_STATUS_REG: 0X0703000...

I am seeing the same error messages in my log as the OP:

[ 3336.284786] iwlagn 0000:01:00.0: Microcode SW error detected.  Restarting 0x2000000.
[ 3336.284810] iwlagn 0000:01:00.0: Loaded firmware version: 17.168.5.2 build 35905
[ 3336.284904] iwlagn 0000:01:00.0: Start IWL Error Log Dump:
[ 3336.284915] iwlagn 0000:01:00.0: Status: 0x0002B2E4, count: 6
[ 3336.285158] iwlagn 0000:01:00.0: Desc                                  Time       data1      data2      line
[ 3336.285170] iwlagn 0000:01:00.0: ADVANCED_SYSASSERT           (0x1BD8) 0299830228 0x00000258 0x000000C8 199
[ 3336.285182] iwlagn 0000:01:00.0: pc      blink1  blink2  ilink1  ilink2  hcmd
[ 3336.285195] iwlagn 0000:01:00.0: 0x05FBC 0x05F1E 0x05F1E 0x0DC1A 0x00000 0x9A90091
[ 3336.285206] iwlagn 0000:01:00.0: CSR values:
[ 3336.285216] iwlagn 0000:01:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
[ 3336.285258] iwlagn 0000:01:00.0:        CSR_HW_IF_CONFIG_REG: 0X00c80303
[ 3336.285296] iwlagn 0000:01:00.0:          CSR_INT_COALESCING: 0X0000ff40
[ 3336.285334] iwlagn 0000:01:00.0:                     CSR_INT: 0X00000000
[ 3336.285371] iwlagn 0000:01:00.0:                CSR_INT_MASK: 0X00000000
[ 3336.285407] iwlagn 0000:01:00.0:           CSR_FH_INT_STATUS: 0X00000000
[ 3336.285442] iwlagn 0000:01:00.0:                 CSR_GPIO_IN: 0X0000003c
[ 3336.285478] iwlagn 0000:01:00.0:                   CSR_RESET: 0X00000000
[ 3336.285515] iwlagn 0000:01:00.0:                CSR_GP_CNTRL: 0X080403c5
[ 3336.285552] iwlagn 0000:01:00.0:                  CSR_HW_REV: 0X000000b0
[ 3336.285588] iwlagn 0000:01:00.0:              CSR_EEPROM_REG: 0X88160ffd
[ 3336.285625] iwlagn 0000:01:00.0:               CSR_EEPROM_GP: 0X90000801
[ 3336.285661] iwlagn 0000:01:00.0:              CSR_OTP_GP_REG: 0X00030001
[ 3336.285696] iwlagn 0000:01:00.0:                 CSR_GIO_REG: 0X00080042
[ 3336.285732] iwlagn 0000:01:00.0:            CSR_GP_UCODE_REG: 0X000063c1
[ 3336.285769] iwlagn 0000:01:00.0:           CSR_GP_DRIVER_REG: 0X00000000
[ 3336.285803] iwlagn 0000:01:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
[ 3336.285838] iwlagn 0000:01:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
[ 3336.285875] iwlagn 0000:01:00.0:                 CSR_LED_REG: 0X00000058
[ 3336.285911] iwlagn 0000:01:00.0:        CSR_DRAM_INT_TBL_REG: 0X881b20dc
[ 3336.285948] iwlagn 0000:01:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
[ 3336.285984] iwlagn 0000:01:00.0:             CSR_ANA_PLL_CFG: 0X00000000
[ 3336.286023] iwlagn 0000:01:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
[ 3336.286058] iwlagn 0000:01:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
[ 3336.286067] iwlagn 0000:01:00.0: FH register values:
[ 3336.286145] iwlagn 0000:01:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X1a241f00
[ 3336.286225] iwlagn 0000:01:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X01b36ba0
[ 3336.286316] iwlagn 0000:01:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X00000038
[ 3336.286406] iwlagn 0000:01:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80819104
[ 3336.286497] iwlagn 0000:01:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
[ 3336.286589] iwlagn 0000:01:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
[ 3336.286685] iwlagn 0000:01:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
[ 3336.286775] iwlagn 0000:01:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
[ 3336.286867] iwlagn 0000:01:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
[ 3336.286988] iwlagn 0000:01:00.0: Start IWL Event Log Dump: display last 20 entries
[ 3336.287085] iwlagn 0000:01:00.0: EVT_LOGT:0300183642:0x00000080:1243
[ 3336.287158] iwlagn 0000:01:00.0: EVT_LOGT:0300183642:0x00040000:1243
[ 3336.287227] iwlagn 0000:01:00.0: EVT_LOGT:0300184009:0x000000fa:0106
[ 3336.287294] iwlagn 0000:01:00.0: EVT_LOGT:0300184046:0x00000080:1243
[ 3336.287362] iwlagn 0000:01:00.0: EVT_LOGT:0300184047:0x00040000:1243
[ 3336.287428] iwlagn 0000:01:00.0: EVT_LOGT:0300184053:0x000000fa:0106
[ 3336.287497] iwlagn 0000:01:00.0: EVT_LOGT:0300184082:0x00002000:1243
[ 3336.287565] iwlagn 0000:01:00.0: EVT_LOGT:0300184083:0x00004000:1243
[ 3336.287631] iwlagn 0000:01:00.0: EVT_LOGT:0300184139:0x00000080:1243
[ 3336.287697] iwlagn 0000:01:00.0: EVT_LOGT:0300184140:0x00040000:1243
[ 3336.287763] iwlagn 0000:01:00.0: EVT_LOGT:0300184446:0x000000fa:0106
[ 3336.287831] iwlagn 0000:01:00.0: EVT_LOGT:0300184486:0x00000080:1243
[ 3336.287897] iwlagn 0000:01:00.0: EVT_LOGT:0300184487:0x00040000:1243
[ 3336.287965] iwlagn 0000:01:00.0: EVT_LOGT:0300184493:0x000000fa:0106
[ 3336.288031] iwlagn 0000:01:00.0: EVT_LOGT:0300184522:0x00002000:1243
[ 3336.288097] iwlagn 0000:01:00.0: EVT_LOGT:0300184522:0x00004000:1243
[ 3336.288164] iwlagn 0000:01:00.0: EVT_LOGT:0300184525:0x00001000:1243
[ 3336.288232] iwlagn 0000:01:00.0: EVT_LOGT:0300184733:0x00000080:1243
[ 3336.288298] iwlagn 0000:01:00.0: EVT_LOGT:0300184734:0x00040000:1243
[ 3336.288364] iwlagn 0000:01:00.0: EVT_LOGT:0300189360:0x00000000:0125

This repeats itself every couple of seconds. I am running it as a wireless access point using hostapd though, and I am not losing connection to it (I am connected to it with several Android phones, and a MacBook pro).

Throughout the day of it just sitting with phones connecting and disconnecting it has started kernel panic'ing. I have set up a netconsole to another machine on the network, but it has not happened again. All I have is pictures taken with my iPhone, unfortunately, I wish it was logged to disk someplace so I could give actual text output.

Images available at:

http://imgur.com/a/9eWbk

I can also attach them to this bug report if desired.

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Juliano Ravasi (jravasi) wrote on 2011-08-31:

Just to reconfirm, after I found the bad commit, I git checkout Ubuntu-2.6.38-11.48 and then git revert 2b420838. The resulting kernel does not show the problem, as expected. The commit 2b420838 is bad.

And just like Bert, I too use hostap in this system to connect with my phone and my other laptop. All my tests were done with the interface in "Master" mode, acting as an Access Point using hostap.

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Bert JW Regeer (xistence) wrote on 2011-08-31:

Are you seeing the same kernel panics that I am seeing Juliano?

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Juliano Ravasi (jravasi) wrote on 2011-09-01:

No crashes, but perhaps because I didn't let it run long enough in that configuration. As soon as I noticed the driver crashing, I reported the bug and reverted back to the previous kernel.

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penalvch (penalvch) wrote on 2012-03-24:

Juliano Ravasi, thank you for reporting this bug and helping make Ubuntu better. This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

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

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

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

tags:	added: needs-upstream-testing regression-release
Changed in linux (Ubuntu):
status:	Confirmed → Incomplete

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-05-24:

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

Changed in linux (Ubuntu):
status:	Incomplete → Expired

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Ubuntulinux package

Latest kernel 2.6.38-11.48 crashes the iwlagn (wifi) driver

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